﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2024v5.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2025-06-18T11:06:31-04:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>832899074</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>CENTENNIAL TAX &amp; ACCOUNTING INC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>100 E KIMBERLY RD STE 500</AddressLine1Txt>
        <CityNm>DAVENPORT</CityNm>
        <StateAbbreviationCd>IA</StateAbbreviationCd>
        <ZIPCd>52806</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>364451044</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>ROCK ISLAND GRAND PRIX ATHLETIC</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>ROCK</BusinessNameControlTxt>
      <PhoneNum>5633554289</PhoneNum>
      <USAddress>
        <AddressLine1Txt>1401 32ND AVE</AddressLine1Txt>
        <CityNm>ROCK ISLAND</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>612016128</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>DEBBIE DUFFY</PersonNm>
      <PersonTitleTxt>TREASURER</PersonTitleTxt>
      <PhoneNum>5633554289</PhoneNum>
      <SignatureDt>2025-05-31</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>RICK OELERICH LPA EA</PreparerPersonNm>
      <PTIN>P00029511</PTIN>
      <PhoneNum>5639005900</PhoneNum>
      <PreparationDt>2025-06-12</PreparationDt>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="RetDoc2" referenceDocumentId="RetDoc3">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <WebsiteAddressTxt>WWW.ROCKISLANDGRANDPRIX.COM</WebsiteAddressTxt>
      <Organization501cInd organization501cTypeTxt="4">X</Organization501cInd>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>79463</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>32650</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>36115</ProgramServiceRevenueAmt>
      <InvestmentIncomeAmt>48</InvestmentIncomeAmt>
      <GrossSalesOfInventoryAmt>10650</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>4745</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>5905</GrossProfitLossSlsOfInvntryAmt>
      <TotalRevenueAmt>74718</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>1300</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>645</FeesAndOtherPymtToIndCntrctAmt>
      <PrintingPublicationsPostageAmt>275</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>69551</OtherExpensesTotalAmt>
      <TotalExpensesAmt>71771</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>2947</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>11947</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>14894</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>11947</BOYAmt>
        <EOYAmt>14894</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>11947</BOYAmt>
        <EOYAmt>14894</EOYAmt>
      </Form990TotalAssetsGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>11947</BOYAmt>
        <EOYAmt>14894</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>TO PROVIDE A POSTIVE ENVIROMENT OF COMMUNITY SUPPORT AMONG THE DOWNTOWN ROCK ISLAND RETAIL COMMUNITY, THE CITIZENS OF ROCK ISLAND COUNTY, ILLINOIS AND SCOTT COUNTY, IOWA, AND THE REHABILITATION PROGRAMS OF LAW ENFORCEMENT AGENCIES LOCATED IN THE COMMUNITY WHILE HOSTING A WORLD CLASS EVENT.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>THE SUPPORT OF THE DOWNTOWN ROCK ISLAND DISTRICT DEVELOPMENT ORGANIZATION</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>1300</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>71067</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>71067</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ROGER A RUTHHART</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>10.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>DEBBIE DUFFY</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>10.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOSEPH RAPP</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>10.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>TYLER SCHURR</PersonNm>
        <TitleTxt>VICE PRESIDE</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>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>IL</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>DEBBIE DUFFY</PersonNm>
        <USAddress>
          <AddressLine1Txt>1401 32ND AVE</AddressLine1Txt>
          <CityNm>ROCK ISLAND</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>61201</ZIPCd>
        </USAddress>
        <PhoneNum>5633554289</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>
    </IRS990EZ>
    <IRS990ScheduleB documentId="RetDoc1">
      <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="RetDoc3">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16</FormAndLineReferenceDesc>
        <ExplanationTxt>EXPENSES TV/RADIO/MUGS 1,183 PROMOTER/ OPERATIONS 6,474 BANNERS 888 OFFICE SUPPLIES 59 WEB MAINTENANCE 177 INSURANCE 5,000 GAS/PROPANE 187 CABLE TIES/GLOVES/D TAPE 378 AMBULANCE 1,000 ANNOUNCER 1,000 BARRICADES 1,000 CATERING 1,005 VENDORS/FEED VOLUNTEERS 1,084 MUSIC/PARK RENTAL 1,200 MISCELLANEOUS 1,280 GOLF CARTS 1,440 RENTALS 1,745 HOTEL EXPENSES 2,112 SOUND SYSTEM 2,266 PLAQUES/ROCKS 2,270 PORTA POTTIES 2,362 PRIZE MONEY 3,500 BARRIERS-RENT/TRANSPORT 6,050 DRIVERS 7,225 TRASH/TRACK LABOR 8,192 POLICE/CROSSING GUARDS 10,474 TOTAL 69,551</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART II, LINE 24</FormAndLineReferenceDesc>
        <ExplanationTxt>EQUIP. 2,000 2,000 LESS ACCUMULATED DEPRECIATION 2,000 2,000 TOTAL 0 0</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART III</FormAndLineReferenceDesc>
        <ExplanationTxt>TO PROVIDE A POSTIVE ENVIROMENT OF COMMUNITY SUPPORT AMONG THE DOWNTOWN ROCK ISLAND RETAIL COMMUNITY, THE CITIZENS OF ROCK ISLAND COUNTY, ILLINOIS AND SCOTT COUNTY, IOWA, AND THE REHABILITATION PROGRAMS OF LAW ENFORCEMENT AGENCIES LOCATED IN THE COMMUNITY WHILE HOSTING A WORLD CLASS EVENT.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>