Trail Running calendar near Frederick 2025-2026

The Rocky Gap Trail Run, hosted by EX2 Adventures at Rocky Gap State Park in Flintstone, Maryland, offers challenging 25K and 50K ultra-distance trail races, including relay options for teams of 2 or 3. The course features three distinct loops ranging from 4.4 to 6.5 miles, with varied terrain inclu..

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..

The Fall Backyard Burn Trail Run at Lake Fairfax Park in Reston, VA, offers runners a scenic and engaging trail experience with distances of 5.1 miles (one lap) or 10 miles (two laps). The course features mostly smooth singletrack with some short technical sections involving rocks and roots, minimal..

The Patapsco Valley 50K is an annual trail running event held at Patapsco Valley State Park near Baltimore, Maryland, with race headquarters at CCBC-Catonsville. The event features two main distances: a 50K and a 25K, both available as in-person or virtual races. Runners enjoy a scenic, historic, an..

The Halloween Horror 10k is a trail running event held at Conway Robinson State Forest in Gainesville, Virginia. The course features a loop through forest trails with some technical terrain and minor hills, with the 10k consisting of two laps of the 5k route. The event welcomes both runners and walk..

The Fall Backyard Burn Trail Run at Riverbend Park in Great Falls, VA, is a scenic trail running event held on November 2, 2025. Participants can choose between 5-mile (one lap) and 10-mile (two laps) courses featuring beautiful riverside singletrack trails with a few short hills and stunning views..

The Fire on the Mountain 50K Trail Race takes place in Green Ridge State Forest near Little Orleans, Maryland. Offering two distances, the 50K (approximately 31.95 miles) and 25K (about 16.3 miles), the race features a challenging out-and-back course with technical trails, forest service roads, and..

The MCRRC Stone Mill 50 Mile Run is a challenging trail ultramarathon held in Montgomery Village, Maryland. The 50-mile course features scenic forested and rolling terrain along the Seneca Greenway and Muddy Branch trails, primarily on single-track dirt paths with some small stream crossings. While..

The Schaeffer Half Marathon and 10K Trail Run, hosted by EX2 Adventures, takes place at the scenic Button Farm in Germantown, Maryland. This event features two distances: a 13.3-mile half marathon and a 6.7-mile 10K+, both offering challenging courses with twisty singletrack trails and wide-open far..

The Rosaryville Veterans Day Trail Race, hosted by Annapolis Striders, is an annual trail running event held at Rosaryville State Park in Upper Marlboro, Maryland. The 16th edition in 2025 features two distances: a 50K and a 20K race. Both courses wind through scenic wooded trails and meadows, prima..

The Fall Backyard Burn Trail Run at Hemlock Overlook in Clifton, VA, is a scenic trail running event featuring 5-mile and 10-mile race options. Set in a 425-acre park along the historic Bull Run, the course offers a mix of hiking trails, old dirt roads, stream crossings, grassy fields, and minimal p..

The Hex Hollow Half is a trail running event held in Glen Rock, Pennsylvania, starting and finishing at Spring Valley Park. It offers two race distances: a challenging half marathon of 13.13 miles consisting of two loops, and a shorter 6.66-mile single loop for those seeking a less demanding option...

The Fall Backyard Burn at Laurel Hill is a trail running event held at the Workhouse Arts Center in Lorton, VA, set within 1,600 acres of scenic former prison grounds. The course features a mix of forested and open meadow singletrack trails, primarily dirt and crushed stone, with minimal pavement an..

The Winery at Bull Run Turkey Trot is a scenic trail run held at the Manassas National Battlefield, featuring 5k and 10k options. Participants enjoy running through historic Civil War sites on dirt trails, cross-country paths, and gravel terrain, with some hills along the course. The event benefits..

The 21st Annual Catonsville High School XC Turkey Trot is a cherished community event celebrating health and wellness. Scheduled for November 27, 2025, this event features a 1 Mile Family Fun Run and a 5K race, both of which are chip-timed. Participants can enjoy a family-friendly atmosphere while s..

Devil Dog Ultras is a challenging trail running event held in Prince William Forest Park near Triangle, Virginia. It offers three race distances: 100 miles, 100K, and 50K, all run on a loop course featuring primarily single-track trails with some roots, rocks, and rolling hills but no major climbs...

The Fall Backyard Burn Trail Run at Fountainhead Regional Park in Fairfax Station, VA, is a popular trail running event held on December 7, 2025. The race offers two challenging distances: a 5-mile single loop with 450 feet of elevation gain, and a tougher 10.5-mile course featuring an additional ou..

The Mid-Maryland Trail Festival 50k is a trail running event held at Rockburn Branch Park in Elkridge, Maryland. The race covers 31 miles (50 kilometers) through six loops of approximately 5.179 miles each on wooded trails. Participants can run the full 50k solo or form relay teams of 2 to 6 members..

The Bull Run Run (BRR) 50 Miler is a historic trail race held in Clifton, Virginia, organized by the Virginia Happy Trails Running Club. Established in 1993, it is one of the oldest 50-mile races in the U.S. The course traverses forested, rolling terrain along the Bull Run Occoquan Trail, showcasing..

Run to Remember in Sykesville, MD, is a multi-distance running event held at Piney Run Park, featuring a scenic 5-mile loop through woods, meadows, and alongside a lake. Participants can choose from a 50K, 25K, 5 Miler, or an 8 Hour Challenge, with the 50K requiring six loops and the 25K three. The..