Trail Running calendar near Fort Belvoir 2026-2027

Trail event at Agricultural History Farm Park in Derwood, Maryland offering marathon, 25K and timed 3 hour, 6 hour and 10 hour challenges on five mile laps with on course aid options.

A community 5K and 10K in Rock Creek Park on May 2, 2026, organized by Rock Creek Conservancy. The event blends trail and road running with guided tours, awards, and activities while supporting park restoration and future improvements.

A trail run on May 2, 2026 at 10709 Gunston Rd in Lorton offering a Fun Run, 5K, 10K and virtual options. Proceeds support no-cost enrichment programs at Gunston Elementary School.

Trail half marathon and an about 11K course at Fountainhead Regional Park near Washington DC, featuring rocky, rooty singletrack, stream crossings, notable elevation, and multiple aid stations with water and Gatorade.

The 10th annual cross country style event at Spencerville Adventist Academy features a 5K, 1 Mile, and a kids 1K. Participants receive a T shirt and finisher medal, with awards for class standings, age groups and best costume.

A fundraising 5K run/walk through My Lady's Manor in Monkton, Maryland, supporting The Harford Land Trust and The Manor Conservancy. Includes awards by overall and age groups and a post race happy hour with finger foods.

A four-date series of 10K trail runs in the Pickall Area of Patapsco Valley State Park from May 6 to May 27, 2026, with running time results and options to enter single dates or the full series.

A multi distance trail event in Waterford VA on May 9, 2026 that runs through historic village streets, vineyards, trails and unpaved roads. Proceeds support the Waterford Foundation and 5K and 10K finishers receive a shirt and medal.

A trail event at Cromwell Valley Park on May 9, 2026 offering 25k, 12.5k and a family 5k with mostly single track trails and mile marker activities for kids. Proceeds support local conservation groups.

A Mother's Day 5k and 10k in Silver Spring, Maryland, held by Swift Running with a course that passes through Martin Luther King Jr. Recreational Park. The event offers in person and virtual entries with tiered registration fees.

A four-date series of 10K trail runs in the Pickall Area of Patapsco Valley State Park from May 6 to May 27, 2026, with running time results and options to enter single dates or the full series.

A 100 mile trail ultramarathon in the Massanutten Mountains near Fort Valley, VA, run on rocky trails with over 18,000 feet of ascent and a 36 hour cutoff. Start and finish are at Caroline Furnace Lutheran Camp; entry is open.

Experience a fast and flat race along the historic Chesapeake and Ohio Canal Towpath in Potomac. With 5k, 10k, and half marathon distances available, walkers and runners of all kinds are welcome at Carderock Park.

Join the Ed Poling Memorial HARC Hike for Hunger & Hope, now in its 14th year. Choose from scenic C&O Canal Towpath hikes in May or a challenging Appalachian Trail hike. This fundraising event supports local community programs.

Test your resilience in this 24 hour endurance challenge in Annapolis. Set your own mileage goals to honor military heroes while enjoying provided meals and a community trail running environment.

A four-date series of 10K trail runs in the Pickall Area of Patapsco Valley State Park from May 6 to May 27, 2026, with running time results and options to enter single dates or the full series.

An evening 5 km and 10 km run through the historic Manassas National Battlefield with start and finish at The Winery at Bull Run in Centreville, VA. In-person and virtual entry options are available.

A backyard ultra at Mustang Trailhead where runners must complete an hourly 4.167 mile loop to continue. Options include a 24 hour 100 mile limit or a 12 hour 50 mile After Dark event with a single shared aid station.

A four-date series of 10K trail runs in the Pickall Area of Patapsco Valley State Park from May 6 to May 27, 2026, with running time results and options to enter single dates or the full series.

An annual backyard ultra in Knoxville MD where runners complete a 4.167 mile lap each hour and continue as long as they can. A concurrent 1 mile event runs 24 hours then adds miles each hour until one person remains.