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.

FOSC at Parkside Plaza Rain Gardens Opening Ceremony

Saturday, August 15, from 10:00am – 12:00pm
9039 Sligo Creek Parkway at Three Oaks Drive (entrance on Three Oaks Drive)

FOSC will be a part of the opening festivities for Parkside Plaza’s newest rain gardens. Parkside created three additional large rain gardens to capture and filter runoff from the parking area. The gardens enhance the building’s grounds and reduce the speed of stormwater entering Sligo Creek, just down the hill, which will help control erosion of the creek banks.

All are welcome at this event. The Chesapeake Bay Alliance, funders, and dignitaries will be attending.

Intimate Waterscapes: Intepreting the Poetry of Nature with a Camera with Julius Kassovic

Tuesday, August 18, from 7:00pm – 8:30pm
Zoom link to be provided to registrants. Register here.

An exploration of Sligo Creek through the lens of Julius Kassovic, long-time resident of the watershed and internationally exhibited photographer.

“There are many different ways to use a camera, from portraiture to story-telling. I have tried most of them and found them all challenging and rewarding. Shortly after moving to a home near Sligo Creek in 2004, I discovered what was for me a completely new way to see through a lens. It is little bit of both portraiture and story-telling.

For more than 20 years, I have been going down to the creek at all times of day and in all seasons, walking up and down in waterproof boots, often sitting in the water on a shower stool. I usually spend three hours at a time looking and trying to see what the creek has to show me that day.

Over time it has developed into something like meditation, allowing me to become absorbed by the light, reflections, movement and colors. I try to make photographs that are themselves reflections of what I saw and what I felt. My aim is to convey emotion with images that can be contemplated. I have been captivated by Sligo Creek and try to depict its beauty as beautifully in a photograph as the creek does on water.”

~ Julius

News & Updates

Volunteer Stewards Needed!

FOSC is looking for volunteers to become Stewards in Sligo Creek, Long Branch, Wheaton Branch, and Takoma Branch. For more about what being a Steward means, visit the Sligo Stewards page.

Clean up at Indian Spring Terrace Local Park

More than 30 volunteers cleaned up the entire length of this long narrow park on Sunday, March 8. They wrestled a sofa, mattress, various chairs, fencing, many bags of plastic and glass bottles, cans, fencing, and a plastic castle playset – good for many years if not decades or more of decomposing plastic. After removing well over 1,200 pounds of trash from the park, it is looking a lot better. We also had some Weed Warriors who started freeing trees from English ivy!

Some the volunteers who cleaned up more than 1,000 pounds of trash at Indian Spring local park and restoration site on March 8, 2026.

March 8 cleanup at Indian Spring Restoration site at Flower and Granville by Ed Murtagh

Thanks to everyone who came out and helped us get this park and restoration site, the headwaters of Long Branch, poised for spring growth without the trash and pollutants that would have been carried downstream into the rest of Long Branch. The restoration area, which has 5 stone stormwater retention ponds and hundreds of native plants installed by the Parks Dept, is worth a visit to see the investment the County is making in our watershed.

FOSC volunteers honor Dr. Martin Luther King, Jr. with service in Sligo and Long Branch

Despite the chilly weather, we had good turnouts at our three cleanup and three Weed Warrior events. They were a big success! There were 20 volunteers at Monday’s Weed Warrior event in Sligo Creek Park near Forest Grove, and 50 throughout the weekend.

At the cleanups, over 90 volunteers joined FOSC leaders, collecting over 40 large bags or approx. 1,305 pounds of litter.

During the events, I (along with others) spoke to many people in the park about stewardship. It was a great way to start 2026 and to honor Martin Luther King’s commitment to service. Our next big event will be in February when we shift our efforts to the PG County portion of our watershed.

A big thank you everyone who came out to protect our creeks and parklands!

~ Ed Murtagh, FOSC Vice President and Litter and Stewards coordinator

Join FOSC

FOSC logo

Sligo Creek connects us. Become a FOSC member and help protect and restore the Creek for everyone in our community. It’s simple to do and can be free if you wish. Membership gives you early notice of events and the monthly FOSC newsletter.

You can make a donation, either online here or using the button below (both are 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

See Water Pollution in Sligo? 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 find and fine the pollutors.

In the spring of 2025, a major water main break poured thousands of gallons of chlorinated water, mud and debris into Sligo Creek. As the following video shows, water main breaks are a major threat to Sligo’s water quality and the flora and fauna who depend on it.

Summer 2026 Top Invasives

Check out the Invasives page to see the other side of this postcard, and learn more about invasive plants that are going into the park from yards around the watershed.

FOSC Videos

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

FOSC on Facebook

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