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Home2023-02-03T15:30:12-05:00

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 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.

The Sat, Feb 4th litter clean-up at Sligo Mill Park is postponed due to the very cold weather forecasted. We’ll post the rescheduled date here and on the FOSC Calendar of Events page.

SaltWatch Alerts

Thanks to all the testers who submitted results Tues/Wed/Thurs.

Salt tester Allan Rogers shows how it's done!

SaltWatch tester Allan Rogers shows how it's done!

FOSC held 5 events over the MLK, Jr. holiday weekend. Send in your photos to see them here and on the FOSC photo archive pages.

Long Branch Weed Warriors

Long Branch crew Jan 13 2023

Before and After photos of the weed warriors in front of the area they cleared on MLK, Jr. Day Jan 16, 2023.

Long Branch Weed Warriors MLK Day 2023

Events in honor of MLK, Jr are continuing this week: see the FOSC Calendar of Events for details and sign up links.

Wed Jan 18 Weed Warriors9am to 11am, Kemp Mill Shopping Center at 1150-1132 Arcola Ave, Silver Spring, 20902. We will remove bush honeysuckle, multiflora rose and barberry.

Fri Jan 20th Weed Warrior Workday (open to the public) 9am to 11am, Long Branch Community Recreation Center parking lot at 8700 Piney Branch Rd. To ensure you can find the worksite, we’ll walk together to the back of the park, next to the walking path. Register here.

News & Updates

Congrats to Ed Gertler, Sligo Watershed Weed Warrior

Congrats, Ed Gertler, from all of us at FOSC!

Long-time FOSC member Ed Gertler has wracked up the highest number of volunteer hours of any Weed Warrior for 2022 in Montgomery County. Ed is out rain or shine most days of the week. In 2022, he logged 728 hours, mostly […]

MLK, Jr. Weekend – 3 Sweep the Creek events and 2 Weed Warrior events

Over the long MLK, Jr. holiday weekend, FOSC is hosting several events in conjunction with Montgomery Parks & Recreation, DEP, and CHEER. For […]

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 can be free if you wish.

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!

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.

Last winter’s results and our interpretation of them are on the Water Quality Salt Monitoring page.

It’s not too late to volunteer this winter. Let the Water Quality Committee know if you’re interested: [email protected]

The proposed Royal Farms gas station site at Sligo Creek and Riggs Road. FOSC contributed to a formal appeal, by members of the Carole Highlands Neighborhood Assn, of the Prince George’s County Zoning Hearing Examiner’s recent approval of a 16-pump gas station adjacent to Sligo Creek Park at Riggs Rd. The appeal was drafted with pro-bono legal help from the Chesapeake Bay Foundation and participation by faculty and students in the Environment Law Clinic at the University of Maryland Carey School of Law. Read the appeal on the Letters and Testimony 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 April 28 Planning Commission hearing, the Coalition and many groups and individuals testified or submited written testimony arguing for stronger protections than the Commission’s proposed amendments to the existing Forest Conservation law would provide.

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

MoCo Councilmembers hold signs saying 'Electrify everything now' at the annoucement of the bill. The Council will consider the bill on Tues, July 26.Consider signing the petition asking MoCo Council members to support Bill 13-22, the Comprehensive Building Decarbonization Bill. The hearing for this bill is coming up in a few days, on Tuesday, July 26, 2022.

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.

Recent Videos

Out now: Skunk Cabbage

See many more on the FOSC Youtube Channel

 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
  • 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
  • Tell us about your experience at a FOSC event
  • Suggest an activity
  • Voice your concern about an environmental issue
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