About This Race
The Old Dominion 100 stands as one of ultrarunning's most enduring challenges, having tested runners since 1979 across Virginia's demanding Massanutten Mountains. This legendary event maintains the grassroots spirit of early ultrarunning—entirely volunteer-run with no sponsors, staying true to its original character while attracting runners seeking an authentic test of endurance. The course demands versatility, traversing pavement, gravel roads, single track trails, ATV paths, logging roads, rocks, streams, and mud across 14 significant climbs totaling 14,000 feet of elevation gain. This is neither purely a trail race nor a road race, but a comprehensive challenge that tests a runner's ability to adapt across varied terrain in a single day. As part of the Grand Slam of Ultrarunning series, the Old Dominion draws serious ultrarunners aiming for the coveted silver buckle awarded to sub-24-hour finishers. With its early June timing, limited field of 105 runners, and qualification requirements, the race maintains an intimate, competitive atmosphere that honors ultrarunning's foundational values while providing a world-class challenge.
The Old Dominion course is a measured loop through the Massanutten Mountains, Shenandoah River Valley, and Fort Valley Virginia, featuring 14 significant climbs and 14,000 feet of elevation gain. Runners encounter an exceptional variety of terrain including pavement, gravel roads, single track trails, ATV trails, logging roads, rocky sections, stream crossings, and muddy conditions.
The course is designed as a comprehensive test of endurance and adaptability, challenging runners to maintain pace and efficiency across constantly changing surfaces. Twenty-three aid stations provide support throughout the loop, with crew access at designated points. The most challenging section occurs between miles 75-86, where safety runners are permitted due to the technical terrain typically traversed in darkness.
Elevation Profile
The course gains 13,999 ft over 100 miles, with the steepest section between mile 72–mile 73.
Course Map
Route shown is approximate and for illustration purposes.
Practical Info
Early June in Virginia typically brings warm temperatures with potential for high humidity and afternoon thunderstorms.
IAD - Washington Dulles International
Free camping available at the fairgrounds with no hookups. Several hotels located minutes from the start/finish including Comfort Inn and Holiday Inn Express in Woodstock.
Best For
Notable Features
The Old Dominion maintains the authentic spirit of early ultrarunning as a completely volunteer-run event without sponsors. Part of the prestigious Grand Slam of Ultrarunning series, it awards sterling silver buckles to sub-24-hour finishers and caps the field at just 105 runners. The race's qualification requirements and 47-year history create a competitive yet intimate atmosphere that honors ultrarunning's foundational values.
Prepare for This Race
GEAR GUIDE
The Best Hydration Vests for Ultrarunning in 2026
A tested guide to the best hydration vests for ultra marathons and long trail races — from lightweight racing vests to high-capacity mountain packs.
6 min read
RACE PREPARATION
Racing Western States: The Complete Preparation Guide
Everything you need to prepare for the Western States 100 — course strategy, essential gear, heat training, crew logistics, and what first-timers need to know.
7 min read
RACE GUIDE
The Hardest 100-Mile Races in the World
A look at the 100-mile races that push even the strongest ultra runners to their limits — what makes them brutal, and what draws people back.
3 min read
GEAR GUIDE
The Best Hydration Vests for Ultrarunning in 2026
A tested guide to the best hydration vests for ultra marathons and long trail races — from lightweight racing vests to high-capacity mountain packs.
RACE PREPARATION
Racing Western States: The Complete Preparation Guide
Everything you need to prepare for the Western States 100 — course strategy, essential gear, heat training, crew logistics, and what first-timers need to know.
RACE GUIDE
The Hardest 100-Mile Races in the World
A look at the 100-mile races that push even the strongest ultra runners to their limits — what makes them brutal, and what draws people back.