Ultramarathons Across the US
Find 50K, 50-mile, 100K, and 100-mile ultramarathons. The definitive US ultra running event directory.
Showing a selection of 94 upcoming events
Browse Ultramarathons by State
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Upcoming Ultramarathons
Ultra
QD50: Duel at the creek
Louisville, KY
Ultra
QD50: Duel at the creek
July 19, 2026
Louisville, KY
Ultra
2026 Washington Island Ultra Relay
Washington Island, WI
Ultra
2026 Washington Island Ultra Relay
July 24, 2026
Washington Island, WI
Ultra
Last Buckeye Standing Backyard Ultra
Galena, OH
Ultra
Last Buckeye Standing Backyard Ultra
August 8, 2026
Galena, OH
Ultra
Leadville Trail 100 Run
Leadville, CO
Ultra
Leadville Trail 100 Run
August 15, 2026
Leadville, CO
Ultra
Tour De Tolerance
Santa Teresa, NM
Ultra
Tour De Tolerance
August 16, 2026
Santa Teresa, NM
Frequently asked questions
What is an ultramarathon?▾
An ultramarathon is any race longer than the standard marathon distance of 26.2 miles. Common ultra distances are 50K (31 miles), 50 miles, 100K (62 miles), and 100 miles. Most ultras take place on trails.
What are the most famous ultramarathons in the US?▾
Western States 100 is the most prestigious, followed by Leadville Trail 100, Hardrock 100, and UTMB Canyons. The JFK 50 Mile is the oldest US ultra, running since 1963. Find all of these on RACE.
How do I train for my first ultra?▾
Most runners build up to their first 50K after completing a marathon. Training typically spans 16-24 weeks with weekly mileage of 40-60 miles, including back-to-back long runs on weekends to simulate race-day fatigue.
Do I need trail experience for an ultramarathon?▾
While many ultras are on trails, some are on roads or mixed terrain. For trail ultras, practice running on uneven surfaces and hills. A 50K on a relatively flat trail is a great first ultra for road runners making the transition.
Explore Other Endurance Sports
Running Races
Running Events
Marathons
26.2 miles of grit
Half Marathons
The perfect 13.1
5K Races
Fast, fun, for everyone
10K Races
The next step up
Triathlons
Swim, bike, run
Obstacle Course Races
Mud, walls, glory
Cycling Events
Road, gravel, gran fondo
Swimming Events
Open water awaits
Trail Running
Dirt over pavement
Relay Races
Run it together