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        <Desc>Equipment</Desc>
        <TotalAmt>1990</TotalAmt>
        <ProgramServicesAmt>1990</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Athletic Events</Desc>
        <TotalAmt>12472</TotalAmt>
        <ProgramServicesAmt>12472</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Athletic Event Supplies</Desc>
        <TotalAmt>8361</TotalAmt>
        <ProgramServicesAmt>8361</ProgramServicesAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>26643</TotalAmt>
        <ProgramServicesAmt>26643</ProgramServicesAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>546054</TotalAmt>
        <ProgramServicesAmt>421063</ProgramServicesAmt>
        <ManagementAndGeneralAmt>66858</ManagementAndGeneralAmt>
        <FundraisingAmt>58133</FundraisingAmt>
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      <CashNonInterestBearingGrp>
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        <EOYAmt>302071</EOYAmt>
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      <AccountsPayableAccrExpnssGrp>
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        <EOYAmt>25000</EOYAmt>
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      <OtherLiabilitiesGrp>
        <BOYAmt>2889</BOYAmt>
        <EOYAmt>5519</EOYAmt>
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      <TotalLiabilitiesGrp>
        <BOYAmt>114529</BOYAmt>
        <EOYAmt>305797</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
      <UnrestrictedNetAssetsGrp>
        <BOYAmt>724810</BOYAmt>
        <EOYAmt>1056155</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>724810</BOYAmt>
        <EOYAmt>1056155</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>839339</BOYAmt>
        <EOYAmt>1361952</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>331345</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>false</FSAuditedInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
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        <CurrentTaxYearMinus2YearsAmt>869965</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>682450</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>758215</CurrentTaxYearAmt>
        <TotalAmt>3875856</TotalAmt>
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        <CurrentTaxYearMinus3YearsAmt>711481</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>667329</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>713223</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>630045</CurrentTaxYearAmt>
        <TotalAmt>3439355</TotalAmt>
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      <Total509Grp>
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        <CurrentTaxYearMinus3YearsAmt>1621307</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1537294</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1395673</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1388260</CurrentTaxYearAmt>
        <TotalAmt>7315211</TotalAmt>
      </Total509Grp>
      <PublicSupportTotal509Amt>7315211</PublicSupportTotal509Amt>
      <TotalSupportCalendarYearGrp>
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        <CurrentTaxYearMinus3YearsAmt>1621307</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1537294</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1395673</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1388260</CurrentTaxYearAmt>
        <TotalAmt>7315211</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>1.00000</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.00000</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00000</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00000</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="990B" />
    <IRS990ScheduleD documentId="990D">
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>39403</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>24038</DepreciationAmt>
        <BookValueAmt>15365</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>4981</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>3765</DepreciationAmt>
        <BookValueAmt>1216</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>16581</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Accrued Expenses</Desc>
        <Amt>2800</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>Sales Tax Payable</Desc>
        <Amt>1302</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>Payroll Taxes Payable</Desc>
        <Amt>1417</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>5519</TotalLiabilityAmt>
    </IRS990ScheduleD>
    <IRS990ScheduleG documentId="990G">
      <MailSolicitationsInd>X</MailSolicitationsInd>
      <EmailSolicitationsInd>X</EmailSolicitationsInd>
      <PhoneSolicitationsInd>X</PhoneSolicitationsInd>
      <InPersonSolicitationsInd>X</InPersonSolicitationsInd>
      <SolicitationOfNonGovtGrantsInd>X</SolicitationOfNonGovtGrantsInd>
      <SolicitationOfGovtGrantsInd>X</SolicitationOfGovtGrantsInd>
      <SpecialFundraisingEventsInd>X</SpecialFundraisingEventsInd>
      <AgrmtProfFundraisingActyInd>true</AgrmtProfFundraisingActyInd>
      <FundraiserActivityInfoGrp>
        <PersonNm>Mammoth Mountain Ski Area LLC</PersonNm>
        <USAddress>
          <AddressLine1Txt>PO Box 24</AddressLine1Txt>
          <CityNm>Mammoth Lakes</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>93546</ZIPCd>
        </USAddress>
        <ActivityTxt>Event Management</ActivityTxt>
        <FundraiserControlOfFundsInd>true</FundraiserControlOfFundsInd>
        <GrossReceiptsAmt>1182283</GrossReceiptsAmt>
        <RetainedByContractorAmt>149137</RetainedByContractorAmt>
        <NetToOrganizationAmt>1033146</NetToOrganizationAmt>
      </FundraiserActivityInfoGrp>
      <FundraiserActivityInfoGrp>
        <PersonNm>Green Fox Events</PersonNm>
        <USAddress>
          <AddressLine1Txt>PO Box 8651</AddressLine1Txt>
          <CityNm>Mammoth Lakes</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>93546</ZIPCd>
        </USAddress>
        <ActivityTxt>Event Planner</ActivityTxt>
        <FundraiserControlOfFundsInd>false</FundraiserControlOfFundsInd>
        <GrossReceiptsAmt>390908</GrossReceiptsAmt>
        <RetainedByContractorAmt>22299</RetainedByContractorAmt>
        <NetToOrganizationAmt>368609</NetToOrganizationAmt>
      </FundraiserActivityInfoGrp>
      <TotalGrossReceiptsAmt>1573191</TotalGrossReceiptsAmt>
      <TotalRetainedByContractorsAmt>171436</TotalRetainedByContractorsAmt>
      <TotalNetToOrganizationAmt>1401755</TotalNetToOrganizationAmt>
      <FundraisingEventInformationGrp>
        <Event1Nm>Mammoth Invi</Event1Nm>
        <GrossReceiptsEvent1Amt>899100</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>305997</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>593103</GrossRevenueEvent1Amt>
        <NonCashPrizesEvent1Amt>88247</NonCashPrizesEvent1Amt>
        <FoodAndBeverageEvent1Amt>87452</FoodAndBeverageEvent1Amt>
        <EntertainmentEvent1Amt>400</EntertainmentEvent1Amt>
        <OtherDirectExpensesEvent1Amt>444850</OtherDirectExpensesEvent1Amt>
        <Event2Nm>Bike Games</Event2Nm>
        <GrossReceiptsEvent2Amt>310465</GrossReceiptsEvent2Amt>
        <GrossRevenueEvent2Amt>310465</GrossRevenueEvent2Amt>
        <NonCashPrizesEvent2Amt>49111</NonCashPrizesEvent2Amt>
        <OtherDirectExpensesEvent2Amt>315154</OtherDirectExpensesEvent2Amt>
        <OtherEventsTotalCnt>1</OtherEventsTotalCnt>
        <GrossReceiptsOtherEventsAmt>35761</GrossReceiptsOtherEventsAmt>
        <GrossRevenueOtherEventsAmt>35761</GrossRevenueOtherEventsAmt>
        <RentFcltyCostsOtherEventsAmt>100</RentFcltyCostsOtherEventsAmt>
        <OthDirectExpnssOtherEventsAmt>4636</OthDirectExpnssOtherEventsAmt>
        <GrossReceiptsTotalAmt>1245326</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>305997</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>939329</GrossRevenueTotalEventsAmt>
        <NonCashPrizesTotalEventsAmt>137358</NonCashPrizesTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>100</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>87452</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>400</EntertainmentTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>764640</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>989950</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>-50621</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Fundraiser custody or control of funds (Part I, line 2b (iii))</FormAndLineReferenceDesc>
        <ExplanationTxt>Board Member and Officer, Mark Brownlie, is Chief Operating Officer for Mammoth Mountain Ski Area (MMSA). Pete Korfiatis is an MMCF Board Member and Director of Mammoth Mountain Ski Team a part of the same company (MMSA). Mammoth Mountain Ski Area is the Foundations largest vendor and contributor. It also owns the Ski Team where the majority of students and athletes served by the Foundation are members.The Foundation contracts with Mammoth Mountain Ski Area for a variety of services including fundraising, event food and labor, housinf, entertainment, coaching services and travel. The Foundation also leases its office and program space from MMSA. Board Members with conflicts are asked to recuse themselves from voting on business transactions with entites they are related to.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>General Explanation Attachment</FormAndLineReferenceDesc>
        <ExplanationTxt>The Foundation using MMSAs caterinf services and is charges the market rate for products and services. Thes rates are approved through a Banquet Event Order process. The final invoice is sent to their Corporate Administrative Office who pays 30% of the invoice as a donation to the Foundation. THe remaining 70% is then forwarded to the FOundation for payment.MMSA donates money that is board restricted to provide funding to local education (Mammoth Unified School District). The Foundation requires MUSD to prepare a 5-5 year plan on how funding is needed, how it is used, and the impact generated through the donation.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleG>
    <IRS990ScheduleI documentId="990I">
      <GrantRecordsMaintainedInd>true</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>Mammoth Unified School District</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO Box 3509</AddressLine1Txt>
          <CityNm>Mammoth Lakes</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>93546</ZIPCd>
        </USAddress>
        <RecipientEIN>770109661</RecipientEIN>
        <CashGrantAmt>179700</CashGrantAmt>
        <ValuationMethodUsedDesc>Cash</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>Educational Programs</PurposeOfGrantTxt>
      </RecipientTable>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Educational Scholarships</GrantTypeTxt>
        <RecipientCnt>32</RecipientCnt>
        <CashGrantAmt>17250</CashGrantAmt>
        <ValuationMethodUsedDesc>Cash</ValuationMethodUsedDesc>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Sports Travel and Training</GrantTypeTxt>
        <RecipientCnt>61</RecipientCnt>
        <CashGrantAmt>69702</CashGrantAmt>
        <ValuationMethodUsedDesc>Cash</ValuationMethodUsedDesc>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Monitoring procedures (Part I, line 2)</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization insures funds are utilized for their intended purpose as follows: 1) Local knowledge ad input from parents and students in the rural community; 2) a periodic report will be required by recipients that demonstrates how support was used and presents an acounting of funds disbursed; 3) Receipts are required for reimbursement assistance. Support misused is required to be repaid to the organization.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Additional Information for Schedule I</FormAndLineReferenceDesc>
        <ExplanationTxt>Part IV - Small academic scholarships, book allowances, and sports travel assistance are awarded to applicants based on academic and athletic performance. Grants were given to 32 student athletes for scholarships for college and 61 students received grants for athletic event travel.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleM documentId="990M">
      <WorksOfArtGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <NoncashContributionsRptF990Amt>3710</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </WorksOfArtGrp>
      <ClothingAndHouseholdGoodsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <NoncashContributionsRptF990Amt>8075</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </ClothingAndHouseholdGoodsGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>Jewelry</Desc>
        <NoncashContributionsRptF990Amt>3585</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>Technology</Desc>
        <NoncashContributionsRptF990Amt>1900</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>Professional Services</Desc>
        <NoncashContributionsRptF990Amt>40405</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>See Part II</Desc>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>false</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>true</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Third party arrangements (Part I, line 32b)</FormAndLineReferenceDesc>
        <ExplanationTxt>Noncash contributions for the Mammoth Invitational charity auction are solicited, processed, received by ans presented for sale by the organizations event planners and fund raising contractors.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Additional Information for Schedule M</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization reports number of contributions. Noncash contributions for the year in gross receipts were $493,728 including donated professional services of $22,000 for the Foundation and $18,405 in coupons/auction items of professional services sold in the auction fundraiser. Sch M, Part 1, Lines 25-28Other Non-Cash ContributionsAccommodations: $17,110 FMVEvents: $21,660 FMVTravel Experiences: $61,240 FMVFood and Beverages: $37,268 FMVMemorabilia: $5,190 FMVSports Apparel: $13,040 FMVSports Equipment: $35,430 FMVTravel: $125,907 FMVGift Bags: $78,188 FMVSupplies: $41,020 FMV</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="990O">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990 governing body review Part VI line 11</FormAndLineReferenceDesc>
        <ExplanationTxt>Mammoth Mountain Community Foundation govering Board reviews the return 990 before filing. Stacey Cook the Treasurer will be the Board Member signing the return after Board approval.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Conflict of interest policy compliance Part VI line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Mammoth Mountain Community Foundation and the Board of Directors must comply and sign a disclosure of Actual or Potient Conflicts of Interest as they arise and agree to comply fully with its terms and conditions at all times during service as a Foundation Board member. Board member and officer. Mark Brownlie is Chief Operating Officer for Mammoth Mountain Ski Area (MMSA). Pete Korfiatis is an MMCF Board Member and Director of MMMSA Ski Team. Mammoth Mountain Ski Area is the Foundations largestvendor and contributor. It also owns the Ski Team where a majority of students and athletes served by the foundation are members. The Foundation contracts with Mammoth Mountain Ski Area for a variety of services including fundraising, etc. and leases its office space from MMSA. Board Members with conflicts are asked to recuse themselves from voting on business transactions with entities they are related to. The Foundation is attempting to create written aggreements and evaluate current oral agreements to assure fees and costs are reasonable.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>CEO executive director top management comp Part VI line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Directors meets annually in Executive Session to review and set the annual salary and benefits of the Executive Director using comparable data that is updated every other year.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other officer or key employee compensation Part VI line 15b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Directors meet annually in Executive Session to review and set the annual salary and benefits of key employees using comparable data of similar key staff at similar organizations that is updated every other year.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Governing documents etc available to public Part VI line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Mammoth Mountain Community Foundation makes its public records available to anyone by request of the Executive Director or Board of Directors. Tax forms and financial statements can be requested by the public and either mailed to them or a PDF copy e-mailed. Govering documents (meeting minutes, policies, by Laws, etc.) Can be viewed by the public at the organizations office on a as-requested basis.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Balance Sheet Part X</FormAndLineReferenceDesc>
        <ExplanationTxt>The prepaid rent balance is overstated at the begining of the year because the asset was being reduced by $924 monthly instead of considering the 3% per a year increase. The prepaid asset balance has been adjusted in 2018 to show a lower balance based on the amortization schedule. The adjustment was made for $11,143. The 2018 Form 990 now shows the correct asset balance at year-end of $301,375.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>