About Us

Friends of Cabin John Creek, Inc. (FOCJC) is a volunteer citizen group dedicated to the restoration, preservation and stewardship of the Cabin John Creek watershed, which stretches eleven miles (from the Rockville Metro station down to the Potomac River). Scientific studies have confirmed that the Creek and its eight tributaries are not in good shape. Substantial storm water runoff gushes through the Creek, causing unnatural erosion and sedimentation. The runoff destroys aquatic habitat and flushes away the fish that would otherwise live there. Litter is also a major problem, e.g., posing risks to resident wildlife. The all-volunteer FoCJC organizes cleanups and other activities to improve management of stormwater.

FOCJC regularly collaborates with local organizations including Montgomery County Department of Environmental Protection, City of Rockville, Maryland National Capital Park and Planning Commission, The Potomac Conservancy, Audubon Naturalist Society, Alice Ferguson Foundation, and Izaak Walton League of America.

To Join

Please join the FOCJC. Membership is free and we welcome new members. To join, simply sign up for our newsletter.


Funding for FOCJC is provided by donations from the community, homeowner assocations, and fundraisers. We are very thankful for these donations. Send contributions to: PO Box 267, Cabin John, MD 20818. Checks should be made payable to Friends of Cabin John Creek. For additional information, contact info@cabinjohncreek.org.


The Cabin John Watershed is located in an densely-developed portion of Montgomery County, Maryland, just northwest of Washington, DC. The main-stem headwaters of Cabin John Creek originate in the city of Rockville and the mouth flows into the Potomac River between the towns of Cabin John and Glen Echo, shortly after passing under the historic one-lane Cabin John Bridge on MacArthur Boulevard in Cabin John, Maryland. The Cabin John Creek Watershed is the entire drainage basin that encompasses not only Cabin John Creek, but also such tributaries as Bogley Branch, Old Farm Branch (Upper and Lower), Snakeden Branch, Buck Branch, Beltway Branch, Ken Branch, Congressional Country Club Tributary, and Booze Creek (Upper and Lower). The watershed extends north into the City of Rockville, and is bordered (roughly) on the west by Falls Road, and on the east by Rockville Pike and Old Georgetown Road.


The scenic Cabin John Trail maintained by the Potomac Appalachian Trail Club runs for nine miles through Cabin John Regional Park along Cabin John Creek. To the untrained eye, Cabin John Creek appears to be in a relatively natural or pristine state; but in reality the influence of man has adversely impacted this watershed. The Cabin John Watershed is highly impacted by dense urban development. Impervious surfaces such as buildings and roads (for example, the Beltway and I-270) cover the watershed's soil, causing substantial storm-water runoff to gush through these creeks, causing problems such as unnatural erosion, sedimentation, habitat destruction, and flushing away the fish and smaller organisms that would otherwise live in these waters. (See, for example, the Montgomery County Government Watershed Report ). This, in turn, can adversely impact the quality of the Potomac River and the Chesapeake Bay.

Goals & Activities

The fundamental objective of FOCJC is stewardship to promote the overall long-term health and beauty of the Cabin John Creek Watershed. This, in turn, promotes the health of the Potomac River and Chesapeake Bay watersheds. A major supporting goal is to help educate our members and other watershed residents about water quality issues and possible solutions. To achieve these main objectives, FOCJC is pursuing a variety of activities, including quarterly monitoring; annual trash removal days; a Weed Warriors program to remove invasive exotic weeds; commenting on Montgomery County Department of Environmental Protection (DEP) Cabin John Creek Watershed Restoration Study.

Monitoring Program

One of FOCJC's most successful programs involved monitoring the biological health of the streams in the watershed. FOCJC's quarterly monitoring at eight sites throughout the watershed focused on benthic macro-invertebrates and habitat assessment. The monitoring data collected by FOCJC was submitted to Montgomery County DEP and posted here on our website. Analysis of the results of the data will influence what comments FOCJC submits to DEP on watershed restoration plans and future efforts of FOCJC.


FOCJC has chosen the Cabin John Bridge as a symbol in the FOCJC logo, because the historic Cabin John Bridge (built in 1863) is located at the geographic point where all the water of the Cabin John Creek Watershed flows into the Potomac River.


Friends of Cabin John Creek (FOCJC) began informally in 1999 by members of the Cabin John Citizens Association in Cabin John, Maryland. FOCJC has since incorporated as a 501c3 non-profit and has grown to include members of other citizens associations and interested citizens within and outside the watershed, including residents of Glen Echo, Bethesda, Potomac and Rockville.


The Board meets at least four times per year. All board members are volunteers from the community. (We have no paid staff.)

More Info

If you have further questions or want to let the FOCJC know about something, email info@cabinjohncreek.org.