What FOSC does

Friends of Sligo Creek (FOSC) offers events year round in support and appreciation of Sligo Creek and adjacent parkland. Litter clean-up and invasive plant clear-out events are among the most popular FOSC activities in the spring, summer and fall. FOSC also sponsors guided outdoor explorations of different sections and aspects of Sligo Creek flora and fauna. A wide variety of other programs throughout the year educate neighbors and users of the park about Sligo Creek’s strengths and challenges. FOSC also monitors the creek, advocating for civic policies that will support a healthier Sligo.

FOSC invites you to visit the creek, volunteer at an upcoming event, attend a program, advocate for the Creek, and join FOSC.

    Mon July 4th: Celebrate 20 years of FOSC and 246 years of America

    March with FOSC in the Takoma Park 4th of July parade! Bring a sign with your favorite Sligo watershed animal or plant. All are welcome. Arrive by 9:30am at Carroll and Ethan Allen Aves (“Takoma Junction”). The parade starts at 10am.

    Poster in the kiosks, with photos of animals and plants, asking people to join the Takoma Park 4th of July parade with FOSC.
    Birders: Send in your photos from either of the two recent FOSC birding outings to [email protected] We’ll feature them on this site and add them to the Natural History pages.

    FOSC co-sponsored the Takoma Stormwater Solutions Webinar in May. Watch the video on FOSC YouTube to hear Takoma Park stormwater and other experts discuss the many challenges in controlling rainfall runoff and preventing household flooding.


    Join FOSC

    FOSC logo

    Sligo Creek connects us. Please Join FOSC and help protect and restore the Creek for everyone in our community. It’s simple to do and free.

    You can make a donation
    too, either online (simple and secure) or by check to FOSC, P.O. Box 11572, Takoma Park, MD 20913.
    Thank you!

    News & Updates

    County Council to include 35% green cover req’mt for optional development in DTSS Plan

    This report comes from longtime FOSC member Kathleen Samiy, creator of the Tree Canopy Fact Sheet / Action Plan:   Something really great happened on [...]

    Farewell to Dan McCann!

    The FOSC Water Quality team would like to extend our thanks and great appreciation to Dan McCann, Environmental Health Specialist at the County's Department of [...]

    Vols Needed: Summer ’22 Water Quality Testing

    The Summer '22 Water Quality testing program is getting underway this May! Friends of Sligo Creek (FOSC) is a partner for the third summer with [...]

    FOSC Listserv

    FOSC Listserv

    Groups.io clickable icon

    FOSC Action Hub

    Sligo Creek Water WatchDog mascot

    Report water pollution ASAP!
    Send an email to:

    [email protected]

    You play an important role protecting Sligo. Please report any pollution you see in the creek or heading into a storm drain ASAP, with photos which help County investigators.

    The Road Salt Initiative pilot volunteer programs are concluded for the season. A huge shout out to all the volunteers who braved the winter weather to take water samples from the Creek.

    We’re crunching the numbers and will post the results of the testing and our interpretation on the Water Quality Road Salt page.

    Autumn forest of tall trees with leaves turning yellow, orange, and brown.FOSC Advocacy has been an active partner with the MoCo Forest Conservation Coalition to advocate for strong protection of MoCo’s remaining forests. In an upcoming April 28 Planning Commission hearing, the Coalition and many groups and individuals will testify or submit written testimony arguing for stronger protections than the Commission’s proposed amendments to the existing Forest Conservation law would provide. Sign up to testify in person or virtually, or submit your written testimony to [email protected] by noon, April 27.

    For more information about the issue and the bill, and to get sufficient information to write your own testimony, go to the Audubon Naturalist Society blog. You can use FOSC’s own written testimony as a guide for yours.

    Graphic of proposed downtown Silver Spring redesign of Ellsworth DriveStill pending! Find out why FOSC opposes synthetic turf on Ellsworth Drive in DTSS. Write the County Executive to oppose abandonment of Ellsworth Drive unless healthy alternatives are used. Write to Marc Elrich, Montgomery County Executive.

    Photo of 495 (Beltway) trafficAt their July 21st meeting, the Hogan administration successfully pressured the Transportation Planning Board (TPB) to reverse their June decision to remove the I-495/I-270 Beltway Highway expansion project from the region’s long term transportation plans.

    FOSC Supports the MD Plastic Bag Reduction Act

    FOSC supported the Plastic Bag Reduction Act (HB 314/SB223) which would ban single use bags in MD. It was reintroduced to House of Delegates, Environment & Transportation Committee in Spring 2022 and lost by one vote. We expect the sponsors to reintroduce it in the next session. Write to your delegate or Kumar Barve, Committee Chair, to express your support for a ban on single use plastic bags.

    Map of Wheaton Branch Flood Mitigation Project - issues

    The FOSC Stormwater Committee suggested to DEP and DOT that the Wheaton Branch Flood mitigation project incorporate more green strategies and extend the project to Bucknell Drive. Find out more on the Stormwater page and add your voice to the conversation with DEP/DOT. The FOSC Stormwater Committee meeting schedule is posted on the Calendar of Events page.

    Recent Videos

    See many more on the FOSC Youtube Channel

    Remove Invasives from Your Yard & Keep Them Out of Sligo

    Video of Jim Anderson on invasive non-native plants (click on the image)

    Jim Anderson, Weed Warrior

     FOSC on iNaturalist

    Pine Siskins at Wheaton Branch Ponds by Stephen Davies

    Heard about FOSC on iNaturalist.org but uncertain how to navigate the site or contribute your own observations? Expert birder and iNaturalist… Read more

    FOSC on YouTube

    Support FOSC

    Donate to Friends of Sligo Creek

    Get Involved

    • Participate in your community
    • Meet your neighbors
    • Improve your surroundings
    • Enhance your skill set
    • Advocate for the Creek
    • Arrange a group activity for your club or group
    Join FOSC
    • Receive the monthly eNewsletter
    • Get early notice of events and special opportunities
    • Have your name forwarded to your Section Steward for hands-on events
    • Contribute to special projects
    • Fund outdoor events, expert talks, equipment for invasive plant/litter removal, the kiosks in the park, water quality testing, and more
    • Support FOSC’s outreach to schools, civic groups, and all communities
    We’re listening
    • Tell us about your experience at a FOSC event
    • Suggest an activity
    • Voice your concern about an environmental issue
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