Trail Running calendar near Montgomery County 2026-2027

BRRC GPS Cross Country 5K at Herring Run Park on November 15, 2026 features a cross country style start, mixed surfaces and two river crossings. Entry is free and donations are accepted.

A 48 hour out and back ultramarathon inside Sideling Hill Tunnel near Valley-Hi, PA. Runners cover just under 160 miles in repeated 1.3 mile loops in complete darkness while a Toll Ticket system limits exits.

A 25K trail race in Queen Anne, Maryland on November 21, 2026, organized by Algonquin Ultras and the Centreville Crushers. The mostly single track course features runnable hills, rooty and muddy sections, three aid stations, and awards.

The Freeze Your Gizzard 5K - Leesburg will take place in Leesburg on Saturday 21 November 2026. You can run 5 kilometers.

Experience riverside singletrack at Riverbend Park with 5 and 10 mile trail races. This event offers scenic Potomac River views, a dedicated kids program, and professional race support in a beautiful natural setting.

A 5K and 10K held on the flat Chesapeake and Ohio Canal Towpath at Carderock Park in Potomac, MD the weekend before Thanksgiving; virtual entries are available with options for medals and shirts.

A pre Thanksgiving Turkey Trot at The Winery at Bull Run in Centreville, VA, with scenic 5 km and 10 km courses through the Manassas National Battlefield. In-person races and virtual entries with medal and shirt options are available.

Celebrate Thanksgiving with a cross country style race through scenic Catonsville. Support the local high school running program with a chip timed 5K or a 1 Mile Family Fun Run for all ages.

A trail and canal run near Great Falls, Maryland on November 26, 2026 covering about 10 miles with options to shorten. Entry opens November 12 and is capped at 29 runners; entrants receive course instructions before the run.

A post-Thanksgiving running event at Lake Anna State Park offering 5 km, 10 km, and a half marathon with trail and paved sections. In-person and virtual participation options are available, and walkers are welcome.

Devil Dog Ultras is a loop trail event at Prince William Forest Park near Triangle VA offering 50K, 100K and 100 mile options with staffed aid stations and set time limits. Entry is limited and the 100 mile requires a recent 50 mile finish.

Experience the beauty of Fountainhead Regional Park on a course featuring hiking trails and dirt roads. With two distance options and a dedicated program for kids, this event offers a complete day of trail running near the Occoquan Reservoi..

An eight hour endurance run at Terrapin Nature Park where participants complete 2.8 mile laps to earn surprises placed in a personal stocking. Awards are given to the male and female with the most laps.

A VHTRC holiday time 50k out and back on the Bull Run-Occoquan Trail from Hemlock Overlook to Fountainhead, with four aid stations and a GPX file for navigation. Entry includes lodge access, stocked aid stations, and a catered after party f..

A trail event at Burke Lake Park on December 24 offering in-person 5k and 10k courses around the lake plus virtual options with medal and shirt choices. Walkers are welcome.

A minimally marked 40.3 mile loop through the Massanutten Mountains that passes historic furnace ruins about halfway. The course has three aid stations, 6500 feet of climbing, and requires self navigation and self support.

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 the rolling hills of Fair Hill Natural Resource Management Area during this winter trail event. Choose between 25K or 50K distances on beautiful single track trails with heated facilities and fully stocked aid stations.

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.