<?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="2023v5.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-05-30T12:58:37-00:00</ReturnTs>
    <TaxPeriodEndDt>2023-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>204042761</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Roller &amp; Associates CPAs</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>10704 31st Street</AddressLine1Txt>
        <CityNm>Westchester</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60154</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>264162510</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Chicago Area Mountain Bikers Inc</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>CHIC</BusinessNameControlTxt>
      <PhoneNum>7083655715</PhoneNum>
      <USAddress>
        <AddressLine1Txt>336 Patricia Lane</AddressLine1Txt>
        <CityNm>Bartlett</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60103</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Tom Varvaro</PersonNm>
      <PersonTitleTxt>Treas</PersonTitleTxt>
      <PhoneNum>7083655715</PhoneNum>
      <SignatureDt>2024-05-30</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>Tom</PersonFirstNm>
        <PersonLastNm>Varvaro</PersonLastNm>
      </PersonFullName>
      <SSN>XXX-XX-XXXX</SSN>
    </SigningOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>Dusan Roller</PreparerPersonNm>
      <PTIN>P00535897</PTIN>
      <PhoneNum>7083566270</PhoneNum>
      <PreparationDt>2024-05-30</PreparationDt>
    </PreparerPersonGrp>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>2</TrustedCustomerCd>
        <AuthenticationAssuranceLevelCd>AAL1</AuthenticationAssuranceLevelCd>
        <IdentityAssuranceLevelCd>IAL1</IdentityAssuranceLevelCd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2023</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="5">
    <IRS990EZ documentId="990EZ" softwareId="23017659" softwareVersionNum="23.1.0.0">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <Organization501c3Ind referenceDocumentId="990A">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>199163</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>79398</ContributionsGiftsGrantsEtcAmt>
      <GamingGrossIncomeAmt referenceDocumentId="990G">40688</GamingGrossIncomeAmt>
      <FundraisingGrossIncomeAmt referenceDocumentId="990G">79077</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>66473</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>53292</SpecialEventsNetIncomeLossAmt>
      <TotalRevenueAmt>132690</TotalRevenueAmt>
      <PrintingPublicationsPostageAmt>160</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>108101</OtherExpensesTotalAmt>
      <TotalExpensesAmt>108261</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>24429</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>184686</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>209115</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>184686</BOYAmt>
        <EOYAmt>197615</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <OtherAssetsTotalDetail>
        <EOYAmt>11500</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>184686</BOYAmt>
        <EOYAmt>209115</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>184686</BOYAmt>
        <EOYAmt>209115</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>Build and maintain trails on public land</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Trail building and maintenance of public recreation trails, education of bycyclists, fostering public recreation and liaison with public land managers. Thousands of trail users benefit from the organizationss activities.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>108261</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>108261</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Michael Angus</PersonNm>
        <TitleTxt>Executive Director</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>008.00</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>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <PersonNm>Tom Varvaro</PersonNm>
        <USAddress>
          <AddressLine1Txt>363 Hillside</AddressLine1Txt>
          <CityNm>Glen Ellyn</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60137</ZIPCd>
        </USAddress>
        <PhoneNum>6302488692</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <Form720FiledInd>false</Form720FiledInd>
      <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="990A" softwareId="23017659" softwareVersionNum="23.1.0.0">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>40023</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>42730</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>79592</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>90350</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>79398</CurrentTaxYearAmt>
        <TotalAmt>332093</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>40336</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus1YearAmt>52515</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>79077</CurrentTaxYearAmt>
        <TotalAmt>171928</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <GrossReceiptsNonUnrltBusGrp>
        <CurrentTaxYearMinus4YearsAmt>36751</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>27756</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>30579</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>33979</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>42688</CurrentTaxYearAmt>
        <TotalAmt>171753</TotalAmt>
      </GrossReceiptsNonUnrltBusGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>117110</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>70486</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>110171</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>176844</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>201163</CurrentTaxYearAmt>
        <TotalAmt>675774</TotalAmt>
      </Total509Grp>
      <SubstantialContributorsAmtGrp>
        <CurrentTaxYearMinus2YearsAmt>10000</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>20000</CurrentTaxYearMinus1YearAmt>
        <TotalAmt>30000</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp>
        <CurrentTaxYearMinus2YearsAmt>10000</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>20000</CurrentTaxYearMinus1YearAmt>
        <TotalAmt>30000</TotalAmt>
      </SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>645774</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <TotalAmt>0</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <Post1975UBTIGrp>
        <TotalAmt>0</TotalAmt>
      </Post1975UBTIGrp>
      <NetIncomeFromOtherUBIGrp>
        <TotalAmt>0</TotalAmt>
      </NetIncomeFromOtherUBIGrp>
      <OtherIncome509Grp>
        <TotalAmt>0</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>117110</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>70486</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>110171</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>176844</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>201163</CurrentTaxYearAmt>
        <TotalAmt>675774</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.95560</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.94820</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00000</InvestmentIncomeCYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="990B" softwareId="23017659" softwareVersionNum="23.1.0.0">
      <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>
    <IRS990ScheduleG documentId="990G" softwareId="23017659" softwareVersionNum="23.1.0.0">
      <SpecialFundraisingEventsInd>X</SpecialFundraisingEventsInd>
      <AgrmtProfFundraisingActyInd>false</AgrmtProfFundraisingActyInd>
      <LicensedStatesCd>IL</LicensedStatesCd>
      <FundraisingEventInformationGrp>
        <Event1Nm>Raffle</Event1Nm>
        <GrossReceiptsEvent1Amt>40688</GrossReceiptsEvent1Amt>
        <GrossRevenueEvent1Amt>40688</GrossRevenueEvent1Amt>
        <CashPrizesEvent1Amt>4000</CashPrizesEvent1Amt>
        <Event2Nm>Bike Races</Event2Nm>
        <GrossReceiptsEvent2Amt>79077</GrossReceiptsEvent2Amt>
        <GrossRevenueEvent2Amt>79077</GrossRevenueEvent2Amt>
        <CashPrizesEvent2Amt>62473</CashPrizesEvent2Amt>
        <GrossReceiptsTotalAmt>119765</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>119765</GrossRevenueTotalEventsAmt>
        <CashPrizesTotalEventsAmt>66473</CashPrizesTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>66473</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>53292</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
      <GamingInformationGrp>
        <GrossRevenueOtherGamingAmt>42688</GrossRevenueOtherGamingAmt>
        <CashPrizesOtherGamingAmt>6000</CashPrizesOtherGamingAmt>
        <GrossRevenueTotalGamingAmt>42688</GrossRevenueTotalGamingAmt>
        <CashPrizesTotalGamingAmt>6000</CashPrizesTotalGamingAmt>
        <DirectExpenseSummaryGamingAmt>6000</DirectExpenseSummaryGamingAmt>
        <NetGamingIncomeSummaryAmt>36688</NetGamingIncomeSummaryAmt>
      </GamingInformationGrp>
      <StatesWhereGamingConductedCd>IL</StatesWhereGamingConductedCd>
      <GamingWithNonmembersInd>true</GamingWithNonmembersInd>
      <MemberOfOtherEntityInd>false</MemberOfOtherEntityInd>
      <GamingOtherFacilityPct>1.00000</GamingOtherFacilityPct>
      <IndividualWithBooksNm>Michael Angus Executive Director</IndividualWithBooksNm>
      <PersonsWithBooksUSAddress>
        <AddressLine1Txt>36 Patricia Lane</AddressLine1Txt>
        <CityNm>Bartlett</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60103</ZIPCd>
      </PersonsWithBooksUSAddress>
      <CntrctWith3rdPrtyForGameRevInd>false</CntrctWith3rdPrtyForGameRevInd>
      <CharitableDistributionRqrInd>false</CharitableDistributionRqrInd>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="990O" softwareId="23017659" softwareVersionNum="23.1.0.0">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Program Expense Tools and Equipment 31,367</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Program Expense volunteer accomodation 35,196</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Program Expense Bike Trail Materials 9,091</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Insurance 18,922</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Websirte 4,291</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Softaware Expense 1,045</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Bank Fees 2,913</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Advertising/marketing/public relationbs 3,262</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Miscellaneous Taxes 115</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part I, Line 16, Other Expenses</FormAndLineReferenceDesc>
        <ExplanationTxt>Travel 1,899</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990-EZ, Part II, Line 24, Other Assets</FormAndLineReferenceDesc>
        <ExplanationTxt>Other Assets Beginning of year 0, End of year 11,500</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
