Trail Running calendar near Williamsport 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.

A figure eight trail race at Greenwood Furnace State Park near Huntingdon, PA, featuring a half marathon and a 12K. The course is described as arduous and technical with the park firetower at the center.

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 trail run and walk through historic Waterford VA on May 9, 2026 featuring 5K, 10K, a kids mile fun run and virtual options, with shirts, medals and awards for top finishers.

Trail races at Cromwell Valley Park include 25k, 12.5k and a family 5k with mile-marker activities. Proceeds benefit the Gunpowder Valley Conservancy, Cromwell Valley Park and TALMAR.

Experience a technical trail run through the scenic woods of Camp Hebron with 5K and 10K courses. Navigate hills and stream crossings to earn a finisher beanie and enjoy post race refreshments for a good cause.

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.

Dash Through the Dirt on May 16, 2026 at Carderock Park in Potomac, MD offers 5K, 10K, half marathon and virtual options on courses described as fast and flat; walkers are welcome.

Two days of fundraising hikes in May 2026 offer 5K and 10K canal routes plus 10 and 20 mile Appalachian Trail challenges, with trail support, fundraising matches, and proceeds benefiting Micah’s Backpack and the Refugee Welcome Network.

A two-part fundraising hike in May with Challenge options on the Appalachian Trail and 5K/10K hikes on the C&O Canal, supporting Micah’s Backpack and the Refugee Welcome Network; individual fundraising is matched 2-to-1.

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.

Follow the historic path of the 1889 Johnstown Flood on a hybrid road and rail trail course. Runners can choose between three distances and experience the historic Staple Bend Tunnel before finishing at the Old Stone Bridge.