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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001343072-10-000003.txt : 20100909
<SEC-HEADER>0001343072-10-000003.hdr.sgml : 20100909
<ACCEPTANCE-DATETIME>20100909163242
ACCESSION NUMBER:		0001343072-10-000003
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
ITEM INFORMATION:		Investment Company Act Section 3(c)
ITEM INFORMATION:		Section 3(c)(7)
FILED AS OF DATE:		20100909
DATE AS OF CHANGE:		20100909
EFFECTIVENESS DATE:		20100909

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LARCH LANE ABSOLUTE RETURN I LP
		CENTRAL INDEX KEY:			0001343072
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-82816
		FILM NUMBER:		101064669

	BUSINESS ADDRESS:	
		STREET 1:		800 WESTCHESTER AVENUE S-618
		CITY:			RYE BROOK
		STATE:			NY
		ZIP:			10573
		BUSINESS PHONE:		9147987600

	MAIL ADDRESS:	
		STREET 1:		800 WESTCHESTER AVENUE S-618
		CITY:			RYE BROOK
		STATE:			NY
		ZIP:			10573

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Upstream Capital Fund I L P
		DATE OF NAME CHANGE:	20051101
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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<edgarSubmission>

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001343072</cik>
        <entityName>LARCH LANE ABSOLUTE RETURN I LP</entityName>
        <issuerAddress>
            <street1>800 WESTCHESTER AVENUE S-618</street1>
            <city>RYE BROOK</city>
            <stateOrCountry>NY</stateOrCountry>
            <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
            <zipCode>10573</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>9147987600</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <edgarPreviousNameList>
            <previousName>Upstream Capital Fund I L P</previousName>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <middleName>A.</middleName>
                <lastName>Jurish</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>800 Westchester Avenue</street1>
                <street2>S-618</street2>
                <city>Rye Brook</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10573</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer and Director of Larch Lane Advisors LLC, the Issuer's General Partner and Investment Manager.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kenneth</firstName>
                <middleName>W.</middleName>
                <lastName>Stemme</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>800 Westchester Avenue</street1>
                <street2>S-618</street2>
                <city>Rye Brook</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10573</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of the General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kevin</firstName>
                <lastName>Mirabile</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>800 Westchester Avenue</street1>
                <street2>S-618</street2>
                <city>Rye Brook</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10573</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of the General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ross</firstName>
                <lastName>Weissman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>800 Westchester Avenue</street1>
                <street2>S-618</street2>
                <city>Rye Brook</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10573</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of the General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Stephen</firstName>
                <lastName>McShea</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>800 Westchester Avenue</street1>
                <street2>S-618</street2>
                <city>Rye Brook</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10573</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of the General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <middleName>M.</middleName>
                <lastName>Turpin</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>200 Clarendon Street</street1>
                <street2>53rd Floor</street2>
                <city>Boston</city>
                <stateOrCountry>MA</stateOrCountry>
                <stateOrCountryDescription>MASSACHUSETTS</stateOrCountryDescription>
                <zipCode>02116</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of the General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Linda</firstName>
                <middleName>Tilton</middleName>
                <lastName>Gibson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>200 Clarendon Street</street1>
                <street2>53rd Floor</street2>
                <city>Boston</city>
                <stateOrCountry>MA</stateOrCountry>
                <stateOrCountryDescription>MASSACHUSETTS</stateOrCountryDescription>
                <zipCode>021160573</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of the general Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Stephen</firstName>
                <lastName>Clarke</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>200 Clarendon Street</street1>
                <street2>53rd Floor</street2>
                <city>Boston</city>
                <stateOrCountry>MA</stateOrCountry>
                <stateOrCountryDescription>MASSACHUSETTS</stateOrCountryDescription>
                <zipCode>02116</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of the General Partner</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Hedge Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <aggregateNetAssetValueRange>Decline to Disclose</aggregateNetAssetValueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0001343072-09-000001</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>1999-10-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>59867296</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse>Represents current size of fund at July 31, 2010.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>75</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>Larch Lane Advisors LLC, the General Partner of the Issuer, is entitled to receive an economic benefit for its services on behalf of the Issuer. The Issuer's confidential offering materials set forth detailed discussions of the General Partner allocation.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>LARCH LANE ABSOLUTE RETURN I LP</issuerName>
                <signatureName>Stephen McShea</signatureName>
                <nameOfSigner>Stephen McShea</nameOfSigner>
                <signatureTitle>General Counsel of General Partner</signatureTitle>
                <signatureDate>2010-09-09</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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