<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2020v4.0" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2022-01-10T08:40:05-08:00</ReturnTs>
    <TaxPeriodEndDt>2021-04-30</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>760269860</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Blazek &amp; Vetterling</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>2900 Weslayan Suite 200</AddressLine1Txt>
        <CityNm>Houston</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>77027</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2020-05-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>020785117</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Houston Marathon Foundation</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>HOUS</BusinessNameControlTxt>
      <PhoneNum>2818886515</PhoneNum>
      <USAddress>
        <AddressLine1Txt>720 N Post Oak Rd 200</AddressLine1Txt>
        <CityNm>Houston</CityNm>
        <StateAbbreviationCd>TX</StateAbbreviationCd>
        <ZIPCd>77024</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Chris Gerow</PersonNm>
      <PersonTitleTxt>President</PersonTitleTxt>
      <SignatureDt>2022-01-10</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>Chris</PersonFirstNm>
        <PersonLastNm>Gerow</PersonLastNm>
      </PersonFullName>
      <SSN>999009999</SSN>
    </SigningOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>Barbara Murphy</PreparerPersonNm>
      <PTIN>P01386215</PTIN>
      <PhoneNum>7134395739</PhoneNum>
    </PreparerPersonGrp>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>2</TrustedCustomerCd>
        <AuthenticationAssuranceLevelCd>AAL1</AuthenticationAssuranceLevelCd>
        <IdentityAssuranceLevelCd>IAL1</IdentityAssuranceLevelCd>
        <FederatedAssuranceLevelCd>FAL1</FederatedAssuranceLevelCd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2020</TaxYr>
    <BuildTS>2022-09-23 18:48:47Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="IRS990EZ" referenceDocumentId="IRS990ScheduleO TransfersPersonalBenefitsContr" softwareId="20011551" softwareVersionNum="2020v4.0">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <WebsiteAddressTxt>www.houstonmarathonfoundation.com</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>122979</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>121343</ContributionsGiftsGrantsEtcAmt>
      <InvestmentIncomeAmt>1636</InvestmentIncomeAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <FundraisingGrossIncomeAmt>0</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>0</SpecialEventsDirectExpensesAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <TotalRevenueAmt>122979</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>130127</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>2000</FeesAndOtherPymtToIndCntrctAmt>
      <PrintingPublicationsPostageAmt>1404</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>7642</OtherExpensesTotalAmt>
      <TotalExpensesAmt>141173</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-18194</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>137827</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>7091</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>126724</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>137827</BOYAmt>
        <EOYAmt>126724</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>137827</BOYAmt>
        <EOYAmt>126724</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>137827</BOYAmt>
        <EOYAmt>126724</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>Houston Marathon Foundation supports the advancement of running as an element of a balanced, healthy life in the Houston community and nationally. We support people, projects and ideas that promote an understanding of, access to, and/or participation in running as part of a physical fitness regimen. We also provide grants for innovative thinking and research in the creation of running-related programs.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Families with children of all abilities are invited to participate in the Texas Children's Hospital and Houston Marathon Foundation Family Fun Run each year. The Fun Run is conducted to educate and encourage Houston-area children and their families to adopt active, healthy lifestyles. Over 5,000 individuals typically participate in these events annually.Due to the COVID-19 pandemic, the Texas Children's Hospital and Houston Marathon Foundation Family Fun Run were canceled.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>6339</GrantsAndAllocationsAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Youth Initiatives of the Houston Marathon Foundation makes grants for running related programs and initiatives including, after-school running programs, We Run Houston, college scholarships for high school students, and support of health and wellness activities.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>54257</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>54257</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Community Support and Athletes with Disabilities the Houston Marathon Foundation is committed to making running accessible to athletes of all abilities for participation in races and other physical activity.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>75870</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>75870</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>136466</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Chris Gerow</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Townes Pressler</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Robert Sawchuk</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Doug Suell</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Charlie Bass</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Madeline Bunch</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Brant Kotch</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Ryan Kudlacek</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Wade Morehead</PersonNm>
        <TitleTxt>Executive Dir.</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>10.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>Wade Morehead</PersonNm>
        <USAddress>
          <AddressLine1Txt>720 N Post Oak Rd Ste 200</AddressLine1Txt>
          <CityNm>Houston</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>77024</ZIPCd>
        </USAddress>
        <PhoneNum>7139573453</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="IRS990ScheduleA" softwareId="20011551" softwareVersionNum="2020v4.0">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>215261</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>524652</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>387062</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>282191</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>121343</CurrentTaxYearAmt>
        <TotalAmt>1530509</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TaxRevLeviedOrgnztnlBnft170Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft170Grp>
      <GovtFurnSrvcFcltsVl170Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>215261</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>524652</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>387062</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>282191</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>121343</CurrentTaxYearAmt>
        <TotalAmt>1530509</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>583870</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>946639</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>2084</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>1854</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>1492</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>2017</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1636</CurrentTaxYearAmt>
        <TotalAmt>9083</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <UnrelatedBusinessNetIncm170Grp>
        <TotalAmt>0</TotalAmt>
      </UnrelatedBusinessNetIncm170Grp>
      <OtherIncome170Grp>
        <TotalAmt>0</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>1539592</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>101658</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.61490</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.62440</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB" softwareId="20011551" softwareVersionNum="2020v4.0">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="20011551" softwareVersionNum="2020v4.0">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Grants and Similar Amounts Paid In Excess of $5,000.1</FormAndLineReferenceDesc>
        <ExplanationTxt>Class of Activity: Chevron Charity Winner | Donee's Name: The Arbor School | Donee's Address: 1919 Knoll St Houston TX 77080 | Relationship of Donee: N/A | Cash Amount Given: $25000</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Grants and Similar Amounts Paid In Excess of $5,000.2</FormAndLineReferenceDesc>
        <ExplanationTxt>Class of Activity: Chevron Charity Winner | Donee's Name: Bo's Place | Donee's Address: 10050 Buffalo Speedway Houston TX 77054 | Relationship of Donee: N/A | Cash Amount Given: $25000</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Grants and Similar Amounts Paid In Excess of $5,000.3</FormAndLineReferenceDesc>
        <ExplanationTxt>Class of Activity: Chevron Charity Winner | Donee's Name: Living Water International | Donee's Address: 4001 Greenbriar Dr Stafford TX 77477 | Relationship of Donee: N/A | Cash Amount Given: $25000</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1001</FormAndLineReferenceDesc>
        <ExplanationTxt>Advertising and Promotion $2939</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1002</FormAndLineReferenceDesc>
        <ExplanationTxt>Office Expenses $840</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1005</FormAndLineReferenceDesc>
        <ExplanationTxt>Travel $463</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1</FormAndLineReferenceDesc>
        <ExplanationTxt>Texas Children's Fun Run $3400</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
