Trail Running calendar near Potomac 2026-2027

Trail races at Glenroy Preserve on October 4, 2026 offering 5 mile, 25K, and 50K loops with mixed and technical terrain, multiple creek crossings, four aid stations, chip timing, and post-race refreshments.

Trail races at the Workhouse Arts Center in Lorton VA on October 4, 2026. Options of 5.4 or 10 miles on mostly singletrack through forest and meadow across the former prison grounds.

A trail-based event at Pohick Bay Regional Park on October 4, 2026, offering in-person 5K and 10K races plus virtual options with different medal and shirt choices.

Experience a unique trail event at Milkhouse Brewery in Mount Airy featuring a 5 mile race and timed ultra challenges. Complete as many loops as possible over four or eight hours on this scenic farm course.

A trail-based community event on October 11, 2026 at Bretton Woods Recreation Center featuring a 5K run and 1 mile walk to support the Michael Long Memorial Fund and addiction prevention and recovery services.

A natural-surface 10K at Black Hill Regional Park with rocky, root-strewn trails and varied terrain. Part of MCRRC's low-key series with free entry for members and paid registration for non-members.

Running event at Pinesburg Quarry in Williamsport, MD on October 17, 2026 offering a one mile fun run, a 5K, and a 5 mile race. The course runs in and around the quarry which will be closed for the event.

Timed trail event at Shenandoah River State Park where runners complete as many 3.48 mile loops as possible in 3, 6, 12, or 24 hour options. Supported aid, a hoodie, finisher awards, and a special 100 mile award are included.

A scenic, flat 5K and 10K at Bluemont Park in Arlington on October 17, 2026, with in-person and virtual entry options. Walkers and strollers welcome and tiered registration pricing applies.

A trail run at Lake Fairfax Park in Reston, VA offering **5.1 mile** and **10 mile** singletrack courses with lake views, short technical sections, on-site bathrooms, a kids program, race swag, and optional finish medals.

A trail ultradistance event in Patapsco Valley State Park near Baltimore on October 24, 2026, offering 50k and 25k distances plus virtual options through November 24. Race headquarters is at CCBC Catonsville, with aid stations and finishers..

A marked trail competition in Prince William Forest Park offering a 25 km one loop and a 50 km two loop option with on course aid stations. Entry opens September 15, 2026 and the field is limited to 110 runners.

Trail races at Conway Robinson State Forest on October 25, 2026, offering 5K, 10K and several virtual options with medal and shirt choices; walkers are welcome.

Scenic 5K through vineyard and farm at Rocklands Farm Winery with chip timing, age group awards, and a post-race wine tasting with live music. Walkers and children are welcome and a one hour course time limit applies.

Fire on the Mountain on November 1, 2026 in Green Ridge State Forest offers two trail distances, about 32.8 miles and 16.3 miles, on red and green trails with technical sections, several aid stations, and a midpoint oasis.

Trail races at Button Farm in Germantown, MD on November 7, 2026 feature twisty singletrack and open farm fields, with distances of 13.5, 6.7 and 3.2 miles. The event includes aid stations, portajons, finisher medals and post-race food.

Experience a 50 mile trail race through the scenic Seneca Greenway and Muddy Branch trails in Maryland. This event features forested single track terrain and small stream crossings for dedicated distance runners.

Run Through the Grapevine is an 8K cross country race at Linganore Winery in Mount Airy, Maryland on November 8, 2026. The course runs through vineyard rows and adjacent hop yards, and all finishers receive one free winery tasting.

Trail races of **50K** and **20K** loop Rosaryville State Park single track in Upper Marlboro, MD, with two aid stations, a drop bag area, participant limit, and post race food and festivities.

Trail races at Hemlock Overlook in Clifton, VA offer two loop options, 5.2 miles or 9.5 miles. The course follows hiking trails, dirt roads and fields along Bull Run and includes designated spectator areas and park facilities.