About This Race
The 3H Trail Half Marathon and DHRT 50K takes place along Virginia's Dahlgren Railroad Heritage Trail in August, earning its "3H" moniker from the HOT, HAZY, and HUMID conditions that define this summer challenge. The race embraces these challenging weather conditions as part of its character, offering runners a test of heat tolerance alongside the scenic beauty of the converted rail trail. The course follows the Dahlgren Railroad Heritage Trail, a mostly flat and smooth converted railway that provides a fast, runnable surface. This out-and-back format allows runners to experience the full length of the heritage trail while maintaining relatively easy navigation. The flat profile means elevation won't be the challenge here - instead, runners must contend with Virginia's notorious August heat and humidity. Despite the demanding weather conditions, the race attracts a substantial field of 500 participants across both distances. All finishers receive a technical tank top and medal, practical rewards for tackling Virginia's summer heat. The early 6:30 AM start time helps runners get ahead of the day's peak temperatures, though the infamous 3H conditions will still test everyone's heat management skills.
The race utilizes the Dahlgren Railroad Heritage Trail, a converted railway that provides a predominantly flat, smooth surface ideal for fast times if not for the challenging weather conditions. The out-and-back format covers the scenic heritage trail, allowing runners to experience the full character of this former railroad corridor.
The course terrain consists entirely of paths with no technical trail sections or road segments, making it accessible to runners more accustomed to smoother surfaces while still providing the trail running experience. The flat elevation profile means mechanical difficulty comes not from climbing but from managing effort and hydration in Virginia's demanding August heat.
Elevation Profile
The course gains 371 ft over 31 miles, with the steepest section between mile 67–mile 67.
Course Map
Route shown is approximate and for illustration purposes.
Practical Info
Hot, hazy, and humid August conditions in Virginia with temperatures likely in the 80s-90s°F and high humidity.
Best For
Notable Features
The race's defining characteristic is its embrace of Virginia's notorious August heat and humidity, earning the "3H" designation that runners either love or learn to respect. The Dahlgren Railroad Heritage Trail provides a unique setting with historical significance, offering a scenic converted railway experience that's both runnable and visually appealing despite the challenging weather conditions.