Recurring series

2026 Fall Flat 5-K Greenbelt Trail Race

Fall Flat takes you along the White Trail and around Willowbrook Lake; it is flat and well suited for novice runners and walkers as well as more competitive athletes. The trails wind and turn, and you must follow course markers to ensure you head in the right direction You will encounter uneven surfaces, gullies, tree roots, logs, rocks, foot bridges and mud - it's a trail race! The course is clearly marked with overhead ribbons. Course marshals are in place to provide assistance. Go here to view a map of the entire Greenbelt trail system. Timing and Race Day InformationRegistration: Online registration is preferred and available through 5 pm the day prior to the event. Race day registration will begin at 8 am. Arrival: Come early to stretch, hydrate, and soak in the atmosphere starting at 8 am. Spectactors are welcome to cheer you on! Race Day Pick-Up: Bibs and swag will be distributed on race day starting at 8 am - please attach your bib to the front of your shirt or shorts.