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The Watershed

Cabin John Creek Watershed


The Cabin John Creek Watershed is located in southern Montgomery County, Maryland, just northwest of Washington, DC.  The headwaters of Cabin John Creek originate in the City of Rockville. The creek flows south about 10 miles, passing under Interstate 270, through Cabin John Regional Park, under the Capital Beltway (I-495), and the historic Cabin John Bridge, to its confluence with the Potomac River near the towns of Cabin John and Glen Echo.


The major tributaries of the creek are:

Bogley Branch

Booze Creek

Buck Branch

Congressional Branch

Ken Branch

Old Farm Branch

Snakeden Branch

Thomas Branch (also called Beltway Branch)


The watershed is in Maryland's Piedmont Plateau geologic province, with an area of about 16,022 acres (25 square miles), and has been significantly affected by high-density residential and commercial development.  There are parks, trails and natural areas throughout the watershed.  In addition to the Regional Park, there are wooded park lands and buffer areas along several miles of the creek mainstem and tributaries.  At least 30 species of fish have been identified in the Cabin John Creek mainstem and tributaries.


Zip code boundaries do not align with watershed boundaries, but the Cabin John Creek Watershed extends into:

20854 - Potomac

20852 - North Bethesda

20850 - Rockville

20818 - Cabin John

20812 - Glen Echo

20817 - Bethesda

20814 - Bethesda (small portion)


Land-Use Planning


FoCJC has collected CJC Watershed-related information and websites.



FoCJC has compiled links to useful watershed-related websites.

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