Trail Running calendar near Gaithersburg 2025-2026

The 3H Trail Half Marathon in King George, Virginia, is a scenic, flat, and fast out-and-back race held entirely on the Dahlgren Railroad Heritage Trail, a converted railroad bed featuring dirt, gravel, grass, and pine needle surfaces. The course offers nearly 100% shade from surrounding trees, prov..

The Dahlgren Heritage Rail Trail 50K is a challenging ultramarathon held in King George, Virginia, on August 2, 2025. This 31-mile race takes place on the Dahlgren Railroad Heritage Trail, a flat, well-maintained, and mostly shaded converted railroad bed featuring dirt, grass, pine needles, crushed..

The Third Winchester Battlefield Half, held on August 9, offers scenic trail routes through the historic battlefield. Participants can choose from a half marathon, 10k, or 5k race, with the half marathon consisting of three loops on a light gravel dirt path. The event features chip-timed results, fi..

The MD Heat Trail Race, held in Elkridge, Maryland at the Patapsco Pickall Area, offers challenging trail running distances of 25K and 50K. The course features rolling single-track trails with over 2,000 feet of elevation gain, including technical rocky sections, two river crossings, and a short pav..

The Slopeside Slumber Party is a unique nighttime running event held at Roundtop Mountain Resort in Lewisberry, PA. Participants have three hours to complete as many laps as they can on a challenging 1.5-mile loop featuring 600 feet of elevation gain. The course includes 0.5 miles of pavement and 1..

The Miner's Lady 8-Hour is an endurance running event held in Harpers Ferry, West Virginia, where the Blue Ridge Mountains meet the Shenandoah River. Participants run a challenging 10K loop featuring 850 feet of elevation gain, primarily on single-track trails that pass waterfalls and creek crossing..

The Inferno 10k is a challenging trail running event held at Dirt Farm Brewing in Bluemont, Virginia. The course features rugged forest terrain with technical sections including tree roots and rocks, along with notable elevation changes. The 10k race consists of two loops of a winding trail behind t..

The Vineyard Vista 10k and 5k is a scenic running event held at Muse Vineyards in Woodstock, VA. Participants can enjoy a course that combines cross-country around vineyards, paved road sections, and trail segments through Seven Bends State Park. The event benefits Friends of Seven Bends State Park..

Trails 4 Tails in Hanover, PA, is a trail running event held at scenic Codorus State Park, featuring a 5.72-mile loop course around Lake Marburg with single track trails and shoreline views. The event offers three race distances: a 40-mile ultra consisting of seven loops with approximately 4,200 fee..

The VHTRC Women's Half Marathon will take place in Fairfax Station on Saturday 13 September 2025. You can run between 7 and 13 miles.

The 12 Hour Adventure Trail Run takes place at Prince William Forest Park near Triangle, Virginia. This challenging event features a 6.5-mile figure-eight loop trail course with approximately 650 feet of elevation gain per loop, combining single track and fire road terrain. The course is designed to..

The Valley View Hard Cider Challenge Half is a scenic and challenging race held at Valley View Farm in Delaplane, VA. Participants can choose from a half marathon, 10k, or 5k course, featuring cross-country, trail, and hill segments. The event offers a festive atmosphere with a finish line cider, fi..

The Cancer Warriors 5k is an annual running event dedicated to raising funds and awareness for cancer research. Scheduled for September 20, 2025, this event has successfully raised over $38,000 to support those affected by cancer. Participants can register as runners or "ghost runners," allowing ind..

The Final Countdown Tribute is an exciting running event hosted by 2 Lowe Run Company at Amani Brewing in Martinsburg, WV. This unique race features a 1.33-mile loop course where participants must complete laps within a progressively decreasing time limit. Starting with a 20-minute lap, the time sho..

The Woodstock Warrior is a challenging trail running event held at Seven Bends State Park in Woodstock, Virginia. The race features a roughly 10-mile looped course with mixed terrain, including gravel roads, two-track dirt roads, and single-track trails, with about 1,800 feet of elevation gain per l..

Mountain Creek Mayhem is a trail-running event held at Pine Grove Furnace State Park in Gardners, Pennsylvania, within the scenic Michaux State Forest of the Appalachian Mountains. The race offers three distances: a challenging 50K, a scrambly 20-mile course, and a spicy half marathon. Participants..

The Brandy Station Battlefield 10k is a trail running event held at Brandy Station Battlefield in Virginia. The course combines cross country terrain with gravel dirt roads, featuring slight elevation changes but no major climbs. Runners can choose between 5k and 10k distances, with the 10k route be..

The Conestoga Trail Run - 10 Tough Miles is a challenging trail race held in Holtwood, Pennsylvania, known for its rugged terrain and scenic views. Celebrating over 30 years, this event features a hilly course with rocky paths and stream crossings, making it suitable for experienced trail runners ag..

The Full Distance 10k and 5k is a scenic trail race held at Locust Shade Park in Triangle, VA. Participants can choose between a 5k or 10k course, with the event featuring chip timing, finisher medals, and technical event shirts. The course includes trail segments with some roots and hills, and wate..

The Rick O'Donnell Memorial 5 Mile Trail Run and Ultra Challenge is an annual event held in Mount Airy, Maryland, organized by the Frederick Steeplechasers Running Club. Taking place on October 12, 2025, it features three challenging race options: a 5-mile trail run, a 4-hour challenge, and an 8-hou..