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.

    Urban Forestry in Parks
    Colter Burkes, Senior Urban Forester at Parks, led a presentation and discussion of tree management in Moco Parks. View the video of the Oct 27th presentation.

    Fall Sweep the Creek

    Thanks to everyone who participated in the Fall Sweep. Send in photos of your “favorite” finds for the Sweep the Creek photos page.


    Join FOSC

    FOSC logo

    Sligo Creek connects us. Join FOSC and help protect and restore the Creek for everyone in our community. Make a donation too, either online (easy and secure) or by check to FOSC, P.O. Box 11572, Takoma Park, MD 20913. Thank you!

    FOSC Listservs on

    Friends of Sligo Creek Main Listserv

    FOSC-Litter Listserv

    FOSC-Stewards Listserv (for Section Stewards only)

    FOSC-WeedWarriors (for certified Weed Warriors only)

    News & Updates

    Oct 2021 Newsletter

    October Event Why are trees being cut down along Sligo Creek and in the Park? Will they be left to decompose? Will their absence affect the Creek ecology? Will they be replaced? Join FOSC on Wed Oct 27 at 7pm to learn [...]

    FOSC wins grant to print Spanish language brochure

    FOSC won a Community Champion grant from Constellation Energy, an Exelon Company, which will fund a new [...]

    FOSC Listserv

    FOSC Listserv

    Groups.io clickable icon

    FOSC Action Hub

    Sligo Creek Water WatchDog mascot

    Report it 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.

    A beneficial native vine sometimes mistaken for an invasive plant.

    Unless you are a MoCo certified Weed Warrior, please don’t cut or remove plants in Sligo Creek park. Recently someone mistakenly cut a native grape vine. If you have a question about a vine, please contact [email protected]. To become a Weed Warrior, email [email protected] montgomeryparks.org

    Anacostia river watershedTake the Anacostia River survey! The Metropolitan Washington Council of Governments (COG), in support of the environmental offices of Prince George’s County, Montgomery County and the District of Columbia, want to understand how much their residents know about the Anacostia River, including their beliefs and opinions about how healthy the river is, and who or what influences the river’s health.
    English: https://www.surveymonkey.com/r/Z6K93CY
    En Español: https://www.surveymonkey.com/r/Z62NGWL

    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.

    Graphic of proposed downtown Silver Spring redesign of Ellsworth DriveFind 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.

    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 is expected to be reintroduced to House of Delegates, Environment & Transportation Committee. 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 more on the FOSC Youtube Channel

    Remove Invasives from Your Yard & Keep Them Out of Sligo

    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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