﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2024v5.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2025-06-03T12:58:45-05:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>831445511</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>SMITH MARION &amp; CO</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>PO BOX 943/28200 HWY 189 O1-240</AddressLine1Txt>
        <CityNm>LAKE ARROWHEAD</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>923520943</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>953711135</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>MOUNTAINS HUMANE SOCIETY</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>MOUN</BusinessNameControlTxt>
      <PhoneNum>9093378428</PhoneNum>
      <USAddress>
        <AddressLine1Txt>PO BOX 452</AddressLine1Txt>
        <CityNm>LAKE ARROWHEAD</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>92352</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>GINA JENSEN</PersonNm>
      <PersonTitleTxt>TREASURER</PersonTitleTxt>
      <PhoneNum>9093378428</PhoneNum>
      <SignatureDt>2025-06-03</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>1</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>CARLOS CARAZO</PreparerPersonNm>
      <PTIN>P02046597</PTIN>
      <PhoneNum>9093378428</PhoneNum>
      <PreparationDt>2025-06-03</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="RetDoc1234200001" referenceDocumentId="RetDoc1051800001 RetDoc2278000001">
      <MethodOfAccountingOtherDesc>MODIFIED CASH BASIS</MethodOfAccountingOtherDesc>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>MOUNTAINSHUMANESOCIETY.COM</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="RetDoc1039100001">X</Organization501c3Ind>
      <TypeOfOrganizationOtherInd>X</TypeOfOrganizationOtherInd>
      <GrossReceiptsAmt>109321</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>109303</ContributionsGiftsGrantsEtcAmt>
      <InvestmentIncomeAmt>18</InvestmentIncomeAmt>
      <TotalRevenueAmt>109321</TotalRevenueAmt>
      <SalariesOtherCompEmplBnftAmt>33655</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>3730</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>4805</OccupancyRentUtltsAndMaintAmt>
      <PrintingPublicationsPostageAmt>240</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>60807</OtherExpensesTotalAmt>
      <TotalExpensesAmt>103237</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>6084</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>43511</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>49595</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>43511</BOYAmt>
        <EOYAmt>49595</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>43511</BOYAmt>
        <EOYAmt>49595</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>43511</BOYAmt>
        <EOYAmt>49595</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>WE ARE A NON-PROFIT GROUP OF VOLUNTEERS DOING OUR BEST TO BETTER THE LIVES OF THE DOMESTIC ANIMALS ON OUR MOUNTAIN RANGE SINCE 1975.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>PROVIDES AID TO DOMESTIC ANIMALS ON THE MOUNTAIN RANGE FROM CEDAR PINES PARK TO FOREST FALLS. WE OFFER SPAY/NEUTER ASSISTANCE, EMERGENCY MEDICAL ASSISTANCE, LOST AND FOUND INFORMATION, INFORMATION ON ANIMALS AVAILABLE FOR ADOPTION AND MUCH MORE.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>82205</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>82205</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>KARIN HOLZER</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>20.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>33655</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>BRENDA UTAH</PersonNm>
        <TitleTxt>VICE PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>GINA JENSEN</PersonNm>
        <TitleTxt>SECRETARY AND TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>CA</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>SMITH MARION &amp; CO LLP'S</BusinessNameLine1Txt>
        </BusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 943</AddressLine1Txt>
          <CityNm>LAKE ARROWHEAD</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>92352</ZIPCd>
        </USAddress>
        <PhoneNum>9093378428</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>1</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>61174</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>78424</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>97487</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>99466</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>109303</CurrentTaxYearAmt>
        <TotalAmt>445854</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>61174</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>78424</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>97487</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>99466</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>109303</CurrentTaxYearAmt>
        <TotalAmt>445854</TotalAmt>
      </TotalCalendarYear170Grp>
      <PublicSupportTotal170Amt>445854</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>25</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>19</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>31</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>58</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>18</CurrentTaxYearAmt>
        <TotalAmt>151</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <OtherIncome170Grp>
        <CurrentTaxYearMinus3YearsAmt>149</CurrentTaxYearMinus3YearsAmt>
        <TotalAmt>149</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>446154</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>1475</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.99930</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.99930</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleO documentId="RetDoc1051800001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 4 - OTHER INVESTMENT INCOME</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: INTEREST INCOME. AMOUNT: 18.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16 - OTHER EXPENSES</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: AUTO/TRAILER. AMOUNT: 918. DESCRIPTION: INSURANCE. AMOUNT: 5,458. DESCRIPTION: INTERNET/TELEPHONE. AMOUNT: 3,153. DESCRIPTION: LICENSES/FEES. AMOUNT: 50. DESCRIPTION: OFFICE EXPENSES. AMOUNT: 559. DESCRIPTION: PAYROLL TAXES. AMOUNT: 2,687. DESCRIPTION: PROGRAM EXPENSES. AMOUNT: 47,580. DESCRIPTION: WEBSITE. AMOUNT: 96. DESCRIPTION: GIFTS GIVEN. AMOUNT: 306. TOTAL TO FORM 990-EZ, LINE 16: 60,807.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <TransferPrsnlBnftContractsDecl documentId="RetDoc2278000001">
      <DeclarationDesc>THE ORGANIZATION DID NOT, DURING THE YEAR, RECEIVE ANY FUNDS, DIRECTLY,OR INDIRECTLY, TO PAY PREMIUMS ON A PERSONAL BENEFIT CONTRACT.THE ORGANIZATION, DID NOT, DURING THE YEAR, PAY ANY PREMIUMS, DIRECTLY,OR INDIRECTLY, ON A PERSONAL BENEFIT CONTRACT.</DeclarationDesc>
    </TransferPrsnlBnftContractsDecl>
  </ReturnData>
</Return>