Trail Running calendar near Lorton 2026-2027

A 31.7 mile New Year event in Prince William Forest Park run as three loops on groomed trails and some gravel roads. Unmanned aid at the start and finish is supplied by participants and entry is limited to 120.

Experience a scenic out and back half marathon on the flat and smooth Dahlgren Railroad Heritage Trail. Enjoy a unique post race campfire with roasted donuts and earn a custom finisher medal.

A supported point to point mountain training run of 32 miles that follows much of the first third of the MMT 100, with two aid stations, required car shuttle, limited club support, and recommended GPX and turnsheet navigation.

A 5K and a half marathon along the C&O Canal in Georgetown on January 17, 2027, with virtual options and points toward year-long series.

A January running event in Bethesda with 5K, 10K and half marathon courses at Carderock Recreation Area, plus virtual options and series points.

A scenic Potomac River road race in Potomac, MD offering 5K, 10K, half marathon and virtual options with walkers and strollers welcome.

A 50 km trail run at Hashawha Environmental Center in Westminster MD, featuring varied single-track, open fields, stream crossings and 5 aid stations. Entry for 2027 uses a lottery opening January 1, with indoor facilities and hot post-race..

Club-based 10-mile competition at Howard Community College where runners score points for RRCA clubs, with awards by club and a 2h10m cutoff.

Riverside 8k and 16k in Potomac on February 28, 2027, with courses along the Potomac River and the C&O Canal path running north; nearby waterfalls and virtual participation options are available, and walkers are welcome.

An annual eight hour timed trail event on a 5.5 mile loop at Little Bennett Park in Clarksburg, MD with mostly single-track trails.

The Elizabeth Furnace 50 km is a technical mountain trail race in the Massanutten range covering 30.5 miles and about 6,400 feet of ascent. Aid is limited with staffed stations near 10 and 22 miles so runners must carry personal supplies.

St. Patrick's Half & Marathon on March 14, 2027 in Georgetown features scenic courses along the Chesapeake & Ohio Canal and a Boston qualifying full marathon.

A Last Runner Standing backyard ultra in Lorton, VA on March 20, 2027, using a 4.167 mile (6.7056 km) hourly loop with a limited 65-runner field, chef-supported aid, and entry by Ultrasignup waitlist.

A 14 mile untimed point to point trail run along the Dahlgren Railroad Heritage Trail that starts at one Sheetz and finishes at another. The event features unusual aid station snacks and practical finisher swag.

Genesee Valley Ultra is a timed loop trail event at Genesee Valley Outdoor Learning Center in Parkton, MD. Runners choose 24 hour, 12 hour, or 6 hour formats to complete as many laps as possible on a 2 mile loop, with chip timing and awards..

A 50 mile trail race near Clifton, Virginia on April 4, 2027, run over forested, rolling terrain in spring. Entry opens October 1, 2026; the race has a 13-hour limit and a $125 entry fee.

Run to Remember in Sykesville uses a 5.25 mile loop at Piney Run Park for 50K, 25K, a 5 miler and an 8 hour challenge. Fees include park entrance, a custom ice bandana and a commemorative mug.

A cross country 5K at Red Shedman Farm Brewery on the Linganore Winecellars grounds, with a technical quarter zip and one pour for finishers and on-site picnic and tasting options.

A 100 mile ultramarathon on the C&O Canal towpath in Knoxville, MD with start and finish at Camp Manidokan. The course is one 40 mile loop plus two 30 mile loops, with multiple aid stations and extensive riverside scenery.

A trail running event at the Agricultural History Farm Park in Derwood, Maryland, featuring lap based 3, 6, and 10 hour Challenges and a conventionally timed marathon and 25K. Volunteers receive the same finishers' swag.