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.


    Check back for Aug/Sept events!

    Migratory Fish in Sligo Creek? Tuesday July 20 at 7:00pm via Zoom. What are the prospects for migratory fish like shad and herring in Sligo Creek? Phong Trieu of the Metropolitan Washington Council of Governments Anacostia Program described his findings and observations about the migratory fish entering Anacostia watershed tributaries in recent years. The video of the talk is posted on the Calendar of Events page.

    The ARK/FOSC/NNB Summer Water Quality Monitoring Program is underway and reporting results. Find out the latest on the Water Quality page.

    A cicada hitching a ride on a girl's sunhat

    A girl and a cicada at the Cicada Party in early June.

    Sligo Creek connects us. We organize neighbors like you to:

    • remove non-native, invasive plants;
    • monitor water quality and report illegal pollution through Water WatchDogs;
    • present Zoom programs on Sligo’s natural history and challenges;
    • conduct stream litter clean-ups such Sweep the Creek;
    • manage local stormwater projects and educate our community about stormwater management;
    • advocate for Sligo-friendly practices with local, state and other officials; and more.

    Please help support Friends of Sligo Creek for everyone in our community. Join FOSC, and make a donation today. Donating online is easy and secure. Or donate via check to: FOSC, P.O. Box 11572, Takoma Park, MD 20913.

    Many volunteer efforts are underway now. Find out about them and plan to be a part of protecting Sligo Creek and park.

    Thank you very much.

    -Mike Smith, President of FOSC

    News & Updates

    July 2021 Newsletter

    A Stone Ridge volunteer work crew from 2019 after removing invasives from Sligo led by Jim Anderson. Read more about Jim's work [...]

    FOSC Listserv

    FOSC Listserv

    Link to the FOSC ListServ

    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 experts investigate.


    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 any questions, please contact [email protected]. If you’d like to become a Weed Warrior, email [email protected] montgomeryparks.org

    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 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

    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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