<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2022v5.0" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-03-20T10:36:30-07:00</ReturnTs>
    <TaxPeriodEndDt>2023-10-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>472433079</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>MTA Accounting PA</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>71 High St</AddressLine1Txt>
        <CityNm>Belfast</CityNm>
        <StateAbbreviationCd>ME</StateAbbreviationCd>
        <ZIPCd>04915</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2022-11-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>833459645</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Atlantic Challenge USA</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>ATLA</BusinessNameControlTxt>
      <PhoneNum>4012892521</PhoneNum>
      <USAddress>
        <AddressLine1Txt>181 Back Belmont Rd</AddressLine1Txt>
        <CityNm>Belfast</CityNm>
        <StateAbbreviationCd>ME</StateAbbreviationCd>
        <ZIPCd>04915</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Mary Evans</PersonNm>
      <PersonTitleTxt>President</PersonTitleTxt>
      <SignatureDt>2024-03-20</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>Mary</PersonFirstNm>
        <PersonLastNm>Evans</PersonLastNm>
      </PersonFullName>
      <SSN>999009999</SSN>
    </SigningOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>Kali T McCarthy CPA</PreparerPersonNm>
      <PTIN>P01069497</PTIN>
      <PhoneNum>2073385012</PhoneNum>
    </PreparerPersonGrp>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>2</TrustedCustomerCd>
        <AuthenticationAssuranceLevelCd>AAL1</AuthenticationAssuranceLevelCd>
        <IdentityAssuranceLevelCd>IAL1</IdentityAssuranceLevelCd>
        <FederatedAssuranceLevelCd>FAL1</FederatedAssuranceLevelCd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2022</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="IRS990EZ" referenceDocumentId="IRS990ScheduleO TransfersPersonalBenefitsContr" softwareId="22015553" softwareVersionNum="2022v5.0">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="IRS990ScheduleA">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>68999</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>32586</ContributionsGiftsGrantsEtcAmt>
      <ProgramServiceRevenueAmt>35202</ProgramServiceRevenueAmt>
      <CostOrOtherBasisExpenseSaleAmt>0</CostOrOtherBasisExpenseSaleAmt>
      <FundraisingGrossIncomeAmt>666</FundraisingGrossIncomeAmt>
      <SpecialEventsDirectExpensesAmt>800</SpecialEventsDirectExpensesAmt>
      <SpecialEventsNetIncomeLossAmt>-134</SpecialEventsNetIncomeLossAmt>
      <CostOfGoodsSoldAmt>0</CostOfGoodsSoldAmt>
      <OtherRevenueTotalAmt>545</OtherRevenueTotalAmt>
      <TotalRevenueAmt>68199</TotalRevenueAmt>
      <SalariesOtherCompEmplBnftAmt>37677</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>550</FeesAndOtherPymtToIndCntrctAmt>
      <OccupancyRentUtltsAndMaintAmt>2491</OccupancyRentUtltsAndMaintAmt>
      <OtherExpensesTotalAmt>41830</OtherExpensesTotalAmt>
      <TotalExpensesAmt>82548</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-14349</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>69777</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>55428</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>59597</BOYAmt>
        <EOYAmt>34151</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>10180</BOYAmt>
        <EOYAmt>21553</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>69777</BOYAmt>
        <EOYAmt>55704</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <EOYAmt>276</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>69777</BOYAmt>
        <EOYAmt>55428</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <PrimaryExemptPurposeTxt>Atlantic Challenge USA provides experiences for personal development, youth empowerment, local and international community building, seamanship skills and connection to maritime heritage through rowing and sailing traditional boats.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>For the Summer of 2023 we had 4, week-long programs serving a total of 45 participants who honed their sailing and rowing skills while camping on Greens Island.</DescriptionProgramSrvcAccomTxt>
        <ProgramServiceExpensesAmt>28975</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>28975</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Mary Evans</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Erin Ferree</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Laura Boehm</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Arista Holden</PersonNm>
        <TitleTxt>Executive Dir.</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>40.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>35000</CompensationAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Christopher Rheault</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</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>Arista Holden</PersonNm>
        <USAddress>
          <AddressLine1Txt>181 Back Belmont Rd</AddressLine1Txt>
          <CityNm>Belfast</CityNm>
          <StateAbbreviationCd>ME</StateAbbreviationCd>
          <ZIPCd>04915</ZIPCd>
        </USAddress>
        <PhoneNum>2085148055</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="22015553" softwareVersionNum="2022v5.0">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus2YearsAmt>48188</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>46875</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>32586</CurrentTaxYearAmt>
        <TotalAmt>127649</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus2YearsAmt>8582</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>2853</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>1211</CurrentTaxYearAmt>
        <TotalAmt>12646</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <GrossReceiptsNonUnrltBusGrp>
        <TotalAmt>0</TotalAmt>
      </GrossReceiptsNonUnrltBusGrp>
      <TaxRevLeviedOrgnztnlBnft509Grp>
        <TotalAmt>0</TotalAmt>
      </TaxRevLeviedOrgnztnlBnft509Grp>
      <GovtFurnSrvcFcltsVl509Grp>
        <TotalAmt>0</TotalAmt>
      </GovtFurnSrvcFcltsVl509Grp>
      <Total509Grp>
        <CurrentTaxYearMinus2YearsAmt>56770</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>49728</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>33797</CurrentTaxYearAmt>
        <TotalAmt>140295</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <TotalAmt>0</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <TotalAmt>0</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <PublicSupportTotal509Amt>140295</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <TotalAmt>0</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <Post1975UBTIGrp>
        <TotalAmt>0</TotalAmt>
      </Post1975UBTIGrp>
      <NetIncomeFromOtherUBIGrp>
        <TotalAmt>0</TotalAmt>
      </NetIncomeFromOtherUBIGrp>
      <OtherIncome509Grp>
        <TotalAmt>0</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus2YearsAmt>56770</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>49728</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>33797</CurrentTaxYearAmt>
        <TotalAmt>140295</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <First5Years509Ind>X</First5Years509Ind>
      <PublicSupportCY509Pct>0.00000</PublicSupportCY509Pct>
      <InvestmentIncomeCYPct>0.00000</InvestmentIncomeCYPct>
    </IRS990ScheduleA>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="22015553" softwareVersionNum="2022v5.0">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Revenue.1</FormAndLineReferenceDesc>
        <ExplanationTxt>Merchandise Sales $545</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1001</FormAndLineReferenceDesc>
        <ExplanationTxt>Advertising and Promotion $354</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1009</FormAndLineReferenceDesc>
        <ExplanationTxt>Depreciation $4452</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.1</FormAndLineReferenceDesc>
        <ExplanationTxt>Community Week $15322</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.2</FormAndLineReferenceDesc>
        <ExplanationTxt>Contest Training $6191</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.3</FormAndLineReferenceDesc>
        <ExplanationTxt>Expeditions $4925</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.4</FormAndLineReferenceDesc>
        <ExplanationTxt>Administration $3302</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.5</FormAndLineReferenceDesc>
        <ExplanationTxt>Repairs &amp; Maintenance $1889</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.6</FormAndLineReferenceDesc>
        <ExplanationTxt>Merchandise Expenses $1821</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.7</FormAndLineReferenceDesc>
        <ExplanationTxt>Small Tools $1526</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.8</FormAndLineReferenceDesc>
        <ExplanationTxt>Boat Program Supplies $1011</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.9</FormAndLineReferenceDesc>
        <ExplanationTxt>Bank /Credit Card Fees $739</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Expenses.10</FormAndLineReferenceDesc>
        <ExplanationTxt>Payroll Processing Fee $298</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other Assets.1</FormAndLineReferenceDesc>
        <ExplanationTxt>Boat Equipment - Beginning $10180 Boat Equipment - Ending $0</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Total Liabilities.1001</FormAndLineReferenceDesc>
        <ExplanationTxt>Accounts Payable and Accrued Expenses - Beginning $0 Accounts Payable and Accrued Expenses - Ending $276</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
