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      <MissionDesc>Since 1876, the Appalachian Mountain Club has promoted the protection, enjoyment, and understanding of the mountains, forests, waters, and trails of the Appalachian region. We are the nation's oldest outdoor recreation and conservation organization.</MissionDesc>
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      <Desc>Outdoor Program Centers - The Appalachian Mountain Club (The AMC) manages more than 40 outdoor program centers and backcountry facilities, including lodges, mountain huts, full-service camps, cabins, shelters and campgrounds. These AMC facilities serve as a base for 4-season recreational activities, nature and environmental education courses, programs, scientific research, outdoor artistic pursuits, and other conservation-related activities. Visitors and overnight guests enjoy a broad range of walk-on programs, guided naturalist activities, outdoor recreational safety and skill building workshops, and backcountry activities to choose from. AMC facilities *Refer to Schedule O, Page 45 for Continuation*Outdoor Program Centers (Continued):are managed to reduce environmental impact by providing environmentally sensitive septic systems, composting, public drinking water, and overnight accommodations (some near treeline and in sensitive alpine areas) in areas where camping would have severe effects on the alpine plant life. The AMC facilities provide information and education on the local environment, recreational opportunities, outdoor safety, trails, and emergency shelter. The AMC staff also participates in search-and-rescue efforts throughout the White Mountains of NH and other regions. In 2017, The AMC provided 185,418 overnight guest accommodations at its facilities and information and other services to more than 2 million visitors.</Desc>
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        <Desc>Membership - The Appalachian Mountain Club (The AMC) members provide the grassroots network through which the AMC delivers its programming on a local level throughout our 12 state and district regions. The more than 285,000 members, advocates and supporters of The AMC provide a base of volunteers for trail projects, local clean-up and conservation projects, outdoor education and safety instruction. These members and volunteers organize and lead thousands of recreational outings and provide the local governance structure for the 12 local AMC chapters. Member dues and participation in the above mentioned activities provide a critical base of support for carrying out The AMC mission.</Desc>
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        <Desc>Conservation Research and Policy - The AMC actively promotes the protection, enjoyment and understanding of the mountains, forests, waters and trails of the Appalachian region including critical areas of the four-state Northern Forest, the Mid-Atlantic Highlands of PA, NJ, NY, and CT, and Maine's 100-Mile Wilderness region. The AMC's Research and Policy Program conducts analyses of natural ecosystems to guide its efforts to protect these areas. This includes studying changes in land cover and land use and the impact on ecological and recreational resources; monitoring air quality and climate change impacts on Northeastern mountain ecosystems; analyzing in-stream flow criteria and hydroelectric dam operation impacts on river ecosystems and*Refer to Schedule O, Pages 45-46 for Continuation*Conservation Research and Policy (Continued):recreational resources; developing methods to reduce recreational user impacts on the region's mountains; and studying the benefits and impacts of different transportation options and energy sources, including renewable energy, on the ecosystems of concern to the AMC. Achievements are exemplified by the development and successful implementation of the recovery plan for an alpine plant formerly listed on the federal endangered species list, publication of a national award winning "Ecological Atlas of the Upper Androscoggin Watershed", adoption by states of elements of AMC's wind power siting guidelines and AMC's successful citizen science mountain monitoring program, Mountain Watch.The AMC's Research and Policy program also works with conservation partners and local communities to build grassroots support for priority conservation projects. The Research and Policy Program participates in and comments on formal resource management programs and decisions at the local, state, and federal level; consults with industry and land owners to find equitable solutions to environmental problems; advocates for state and federal land protection, clean air and energy policies, and trails funding, and facilitates member and public participation in local, state and federal environmental issues and policy.</Desc>
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        <Desc>1. Education Program - The Appalachian Mountain Club (The AMC) works with approximately 80,000 young people each year through guided and self-guided programs designed to make the outdoors and the environment accessible and meaningful to youth from all socioeconomic backgrounds. The programs serve youth and adults from Maine to New Jersey and range from day and overnight school programs (grades K-12); walk on activities offered to families coming through The AMC's huts and lodges, weekend long skill-based trainings, to one to three-week outdoor summer adventures for teens. Staff-led programs include our long-standing A Mountain Classroom, Teen Wilderness Adventures, Youth Opportunities Program, Mountain Leadership School, Family Adventure Camps, and destination-based naturalist programs. The AMC has recently launched a new program called Outdoors Rx in four Metro-Boston communities in which healthcare professionals receive training to prescribe regular outdoor physical activity to children. The AMC fills the prescription by providing free, local activities for families to get them active and introduce them to rewarding outdoor activities. Through The AMC's hands-on experiences participants learn how to enjoy the outdoors through skills and improved understanding of the natural world as well as how to minimize their impact on the environment. The AMC is a national provider of Master Educator training in Leave No Trace principles. The AMC serves young people in urban areas through its Youth Opportunities Program by training teachers and youth workers to lead their own outdoor experiences with youth. The AMC also serves rural youth through programming offered in community settings in New Hampshire and Maine. The AMC's regional chapters run outdoor skills programming, recreational hikes and family programs.2. Trails Program - The AMC staff and over 4,000 volunteers are engaged in on-the-ground recreation management and trail maintenance on 1,823 miles of trails, including over 300 miles of the Appalachian National Scenic Trail (AT) in five states. Many of these trails are on public lands, including the White Mountain National Forest, Delaware Water Gap National Recreation Area, Acadia National Park and state parks throughout the region. The AMC offers a broad range of trail volunteer opportunities, including an adopt-a-trail program, teen trail crew programs, and Volunteer Vacations for adults interested in giving back through trail stewardship. The AMC Alpine Stewards educate hikers on how to care for fragile alpine areas. The AMC is collaboratively planning a trail network that will protect and connect the ecological, historic and recreational assets of the Pennsylvania Highlands and create "close-to-home" outdoor recreational opportunities. The Pennsylvania Highlands Trail Network will extend the Highlands Trail (currently 130 miles in New York and New Jersey) along the length of the Pennsylvania Highlands, from the Delaware River at Rieglesville, PA south to the Maryland border in south-central PA. Encompassing roughly 1.9 million acres, the Pennsylvania Highlands includes portions of 13 counties. The AMC is leading the Bay Circuit Alliance in the completion, enhancement, and long-term care of the 230-mile Bay Circuit Trail and Greenway. Our goal is to promote the trail as a vital resource for running, walking, hiking, skiing, and biking for the 4 million people who live in the Greater Boston area. The Bay Circuit Alliance is a collaboration of more than 50 cities, towns, and land trusts, as well as hundreds of dedicated volunteers, working in support of the Bay Circuit Trail and Greenway. As Congressionally designated stewards of the New England National Scenic Trail (NET), which runs from the New Hampshire border to Long Island Sound, The AMC and the Connecticut Forest and Parks Association collaborate on protecting and enhancing recreational opportunities on the NET. The AMC is leading an effort to the complete the Connecticut River Paddlers Trail by developing primitive campsites on the river in Massachusetts and Connecticut. This trail will provide paddlers the opportunity to paddle and camp along the entire 410-mile Connecticut River from New Hampshire to the Long Island Sound. 3. Publications/Communications - Through a variety of publications, The AMC encourages safe and responsible outdoor recreation and stewardship of the region's natural resources. The AMC's member magazine, journal, books, and maps seek to inspire the public to get outdoors in all four seasons. Each publication also stresses safety and stewardship and encourages volunteerism. The AMC's magazine, AMC Outdoors, features recreation and conservation news around the Northeast and Mid-Atlantic, and offers departments on outdoor skills, gear, kids, the environment, first-person perspectives, and history, as well as features on issues such as climate change, ecology, and the challenges of getting young people outdoors. The AMC's website (www.outdoors.org) is an online resource for members and non-members seeking the latest information on local outdoor trips, trip ideas, lodging and program opportunities, backcountry conditions, volunteer opportunities, and web-exclusive narrative stories and how-to videos. The AMC's Appalachia, published biannually since 1876, is the nation's longest running journal on mountaineering and conservation, frequently covering climate change and natural and social history, in addition to international mountaineering news and safety-oriented accident trip reports. The AMC Books publishes a variety of narrative books and guides for hiking, backpacking, biking, paddling, skiing, and more, including the White Mountain Guide, the premier hiking guide for New Hampshire's White Mountains for 110 years. The AMC also publishes field guides and outdoor how-to books on outdoor leadership, trail building, outdoor skills and safety, and outdoor photography.</Desc>
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        <PersonNm>Ed Belove</PersonNm>
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        <PersonNm>Peter Bergh</PersonNm>
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        <PersonNm>Thomas Eagan</PersonNm>
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        <PersonNm>Michael Feldberg</PersonNm>
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        <PersonNm>Moses Feldman</PersonNm>
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        <PersonNm>Sharon Foster</PersonNm>
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        <PersonNm>Rob Hecht</PersonNm>
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        <PersonNm>Jody Inglis</PersonNm>
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        <PersonNm>Scott Livingston</PersonNm>
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        <PersonNm>P Andrews McLane</PersonNm>
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        <PersonNm>John Mullens</PersonNm>
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        <PersonNm>Elizabeth Munro</PersonNm>
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        <PersonNm>Diane Nordin</PersonNm>
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        <PersonNm>Imari Paris-Jeffries</PersonNm>
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        <PersonNm>Dana Pope</PersonNm>
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        <PersonNm>Stephen Rushmore Jr</PersonNm>
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        <PersonNm>Stephen Smith</PersonNm>
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        <PersonNm>Yvette Austin Smith</PersonNm>
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        <PersonNm>John Judge</PersonNm>
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        <PersonNm>Walter Graff</PersonNm>
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        <PersonNm>Bruce Glabe</PersonNm>
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        <PersonNm>Charles W Johnston Jr</PersonNm>
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        <PersonNm>Paul Cunha</PersonNm>
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        <PersonNm>Susan Arnold</PersonNm>
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        <PersonNm>Stefanie Brochu</PersonNm>
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        <PersonNm>Jennifer Norris</PersonNm>
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        <PersonNm>Rebecca Rollins</PersonNm>
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        <PersonNm>Jacqueline Albrecht</PersonNm>
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        <PersonNm>Kenneth Kimball</PersonNm>
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        <PersonNm>Roger Foisy</PersonNm>
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        <PersonNm>Margaret McNamara</PersonNm>
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        <PersonNm>Michelle Murphy</PersonNm>
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          <BusinessName>
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          <BusinessName>
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      <OtherExpensesGrp>
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      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
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      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
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        <CurrentYearAmt>1000000</CurrentYearAmt>
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        <CurrentYearAmt>164360</CurrentYearAmt>
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        <CurrentYearAmt>250000</CurrentYearAmt>
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        <TotalAmt>407013</TotalAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I-A, Line 1:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization has not participated in any political campaign activity, either directly or indirectly.</ExplanationTxt>
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      <CollectionUsedPreservationInd>X</CollectionUsedPreservationInd>
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        <AdministrativeExpensesAmt>155000</AdministrativeExpensesAmt>
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        <MethodValuationCd>F</MethodValuationCd>
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      <OtherSecuritiesGrp>
        <Desc>Split Interest Agreements</Desc>
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        <MethodValuationCd>F</MethodValuationCd>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueNotReportedFinclStmtAmt>-1834242</RevenueNotReportedFinclStmtAmt>
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      <ExpensesNotRptFinclStmtAmt>220236</ExpensesNotRptFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III, Line 1a:</FormAndLineReferenceDesc>
        <ExplanationTxt>AMC Library &amp; Archive Collection: Collection items are primary and secondary source documents, institutional records, and artifacts related to the historical programs of the AMC, which are catalogued and preserved for educational and research purposes. No collection items were capitalized as of December 31, 2017 and 2016.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>The AMC Library &amp; Archives have been an integral part of the AMC since the Club's founding year. They anchor a remarkable landscape in which the past lies alongside the present and future of the Club and the Northeast outdoors. The Library's collection consists of over 2,500 monograph and serial titles. It represents one of the most extensive outdoor recreation book collections in the Northeast and counts among its holdings works on the history of mountaineering, early climbing expeditions, and early explorations. The book collection also contains a vast amount of background information on environmental issues and outdoor activities. At the center of the historical book collection is the Kilbourne Collection of over 500 books on the White Mountains of New Hampshire. Other mountain areas of the Northeast are also well documented. The library has no less than 22 titles on Mount Katahdin alone! The Archive's collection consists of meeting minutes, annual reports, AMC bulletins and journals, scrapbooks, climbing journals, manuscripts, summit registers, photographic works, films, memorabilia, and maps. Logbooks that are no longer sound enough to reside in AMC's historic White Mountain huts can be found here, recording the thoughts and feelings of mountain travelers from decades past. The Archives are particularly rich in visual images, with well over 20,000 images covering the 1870's to the present. The library owns an extensive collection of lantern slides documenting the AMC's early history, and hundreds of postcards and stereograph cards with views of the mountains of the Northeast. The Frederick Endicott and Ralph C. Larrabee photo collections contain hundreds of photographs by these two local photographers of the White Mountains and Adirondacks taken between 1895 and 1935. The historic map collection consists of cartographer Edward G. Chamberlain's detailed maps and itineraries documenting AMC outings from 1876 to 1935. Other maps include contemporary and historic maps of the Northeast, and those published in conjunction with our many guidebooks. The Library &amp; Archives are strongly linked to the AMC's mission. They help to build awareness of AMC using the club's images and information in a wide range of publications, educational programming, and display materials. The Library &amp; Archives support the all departments in their historical documentation needs from preserving their departmental records to providing materials for AMC's magazine, journal, website, marketing campaigns, development efforts, programming, lodging, and the like. The long history of the organization that is housed by the Library &amp; Archives lends credibility and understanding to the Club's current organization and its initiatives.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>The purpose of the AMC's endowment funds is to serve as a perpetual source of financial support for the Club's programs and activities. The financial goal of these funds is to preserve their purchasing power by investing in a diverse portfolio of equity and fixed income securities while, at the same time, providing a reasonable level of annual cash flow to the Club. Permanently restricted endowment funds are subject to donor stipulations requiring such gifts be invested in perpetuity and only the income earned on the invested gifts can be expended. Use of term endowments proceeds are limited to either specific program activities or designated periods of time as stipulated by the donor. Board designated endowment funds, commonly known as unrestricted endowments, can only be expended pursuant to approval of AMC's Board of Directors.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>In determining the recognition of uncertain tax positions, the AMC recognizes the financial statement impact of a tax position when it is more likely than not that the position will be sustained upon examination by a taxing authority. As of December 31, 2017, the AMC has no uncertain tax positions that qualify for either recognition or disclosure in the consolidated financial statements.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Cost of Merchandise Sold -1,190,827. Rental Expenses -643,415.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Part XII, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Cost of Merchandise Sold 1,190,827. Rental Expenses 643,415.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Huber Depreciation and Depletion 220,236.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>AMC has approximately 105,000 members, primarily in the Northeast.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>The members elected the Board of Directors at the AMC Annual Meeting held on January 27, 2017.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7b</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A special committee comprised of board members of AMC's Audit Committee and Finance Committee plus AMC's Chief Financial Officer and President is responsible for overseeing the preparation of IRS Form 990 (990). The 990 and its supporting schedules was prepared by the public accounting firm, Tonneson + Co (Tonneson), responsible for auditing the AMC's financial statements. Tonneson's work was based on information provided to them during the course of the audit by AMC's Finance Department staff, plus additional work requested specific to the 990. The special committee performed a detailed review of the completed 990 and reported the results of its review to the Board of Directors. Subsequent to this review, each member of AMC's Board of Directors received a copy of the 990 prior to filing the form with the IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Pursuant to the AMC's Bylaws, each Board of Director is responsible for disclosing any possible conflict of interest at the earliest practicable time. Additionally, each board member receives a "Conflict of Interest Disclosure Statement and is requested to disclose any potential conflicts of interest on an annual basis.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Directors has appointed a Compensation Committee comprised of three board members who are not employees of AMC or related to any employee of AMC. The Compensation Committee meets annually and is responsible for reviewing and making recommendations to the Board on the compensation of AMC officers, such as the President, key employees and specific highly compensated employees. As part of its review, the Compensation Committee evaluates various criteria including, but not limited to, the organization's goals and objectives, the performance of the staff, and comparative third-party compensation data.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>AMC makes its governing documents, conflict of interest policy, financial statements and Form 990 available to the public upon request. Also, the Form 990 and financial statements are available through the Massachusetts Attorney General's office/website and Guidestar. In addition, AMC's audited financial statements and Form 990 are available on our website, www.outdoors.org.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c:</FormAndLineReferenceDesc>
        <ExplanationTxt>The AMC has an Audit Committee of four members appointed by the Board of Directors, one of whom is a member of the Finance Committee and none of whom are officers of AMC. The Audit Committee is charged with annually recommending the designation of an independent auditor to prepare and submit an audited set of financial statements of the Club to the Board of Directors; meeting with the auditors and any officers, employees or committee members they require to report on and respond to any questions they have on the financial conditions or operations of the Club; and periodically assessing the financial controls and accounting system of the Club and recommending any changes deemed appropriate.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part I, Line 1</FormAndLineReferenceDesc>
        <ExplanationTxt>Founded in 1876, The Appalachian Mountain Club (The AMC) is the nation's oldest outdoor recreation and conservation organization. The AMC has nearly 105,000 members and 16,000 volunteers in twelve chapters from Maine to Washington D.C. We offer over 8,000 outdoor oriented trips each year from hiking and climbing to paddling, snowshoeing and skiing. We serve over 180,000 guests each year at our AMC Outdoor Program Centers, Huts, Camps, Cabins, and Shelters - The AMC destinations are a model for environmental education and stewardship. We teach people the skills to be safe outdoors and care for the natural world around us through outdoor education programs for children, adults, and families as well as outdoor leadership training. We maintain 1,823 miles of trails throughout the Northeast including 300 miles of the Appalachian Trail in five states. We advocate for land and river way conservation, monitor air quality and work to protect alpine and forest ecosystems through the Northern Forest and Atlantic Highlands regions. Through The AMC's Maine Woods Initiative, we own and manage 75,000 acres of working forest as part of an innovative approach to conservation combining outdoor recreation, natural resource protection, sustainable forestry and community partnership. We seek to educate and inform our members, volunteers and conservation partners through our books, magazines, White Mountain visitor centers, The AMC destinations and website. Lastly, The AMC offers thousands of events and activities every year, encouraging members and volunteers to get out, get active and get involved.</ExplanationTxt>
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        <FormAndLineReferenceDesc>Form 990, Schedule R, Parts I(B) and III(B), Primary Activity</FormAndLineReferenceDesc>
        <ExplanationTxt>for AMC Maine Woods Funding, LLC (MWF) and AMC Maine Woods Initiative, LLC (MW Initiative): AMC Maine Woods Funding, LLC (MWF) and AMC Maine Woods Initiative, LLC (MW Initiative) are related organizations created and controlled by the AMC to secure long-term financing to carry out the AMC's Maine Woods Initiative program. The Maine Woods Initiative is the AMC's strategy for land conservation in the 100-Mile Wilderness region in Maine - addressing regional ecological and economic needs through outdoor recreation, resource protection, sustainable forestry and community partnerships. In August 2015, AMC Maine Woods Initiative, LLC, a wholly owned subsidiary of the Appalachian Mountain Club and a disregarded entity for tax purposes, was formed for the purpose of facilitating a $12.6 million financing structured under the New Markets Tax Credit ("NMTC") program of the U.S. Treasury Department. In conjunction with the NMTC financings, which occurred in September and October 2015, the assets of AMC Maine Woods, Inc. and AMC Maine Woods II, LLC, were transferred to AMC Maine Woods Initiative, LLC, and these entities were dissolved in December 2015. A note receivable was created as part of the financing structured under the New Markets Tax Credit ("NMTC") program of the U.S. Treasury Department and will be paid concurrent with the settlement of the corresponding loans payable mentioned below. In connection with these notes, AMC and an outside organization made contributions to AMC Maine Woods Funding, LLC, treated as a partnership under tax law, resulting in a 5% minority ownership by the outside organization. The above referenced loans payable are also part of a financing structure under the NMTC program of the U.S. Treasury Department. Loan proceeds are to be used for specified project expenses in Piscataquis County, Maine by the AMC's wholly owned subsidiary AMC Maine Woods Initiative, LLC. The loans are secured by certain assets. The loan and related agreements specify debt forgiveness provisions at maturity, and require the AMC to comply with certain covenants. In conjunction with the Loans Payable, single purpose lending entities were established by the lenders whose sole activities are the loans to the AMC Maine Woods Initiative, LLC. The AMC has entered into a put and call agreement with the lenders whereby the AMC may acquire the lending entities from the bank in 2022 or thereafter. It is expected that the AMC will acquire the entities in 2022 and will repay all amounts outstanding, less debt forgiveness amounts, at that time.</ExplanationTxt>
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      <ReimbursementPaidToOtherOrgInd>1</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AMC Maine Woods Initiative LLC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>P</TransactionTypeTxt>
        <InvolvedAmt>3416440</InvolvedAmt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>