50K

The 50K is the entry distance into ultramarathon racing. It is mostly run on trail and hilly courses. Find a comprehensive list of 50Ks below.

Siuslaw Dunes

March 8, 2025
Florence

Chuckanut 50K

March 15, 2025
Bellingham

Old West 50k, Marathon, Half Marathon

March 15, 2025
Julian

Behind the Rocks Ultra

March 22, 2025
Moab

Crown King Scramble

March 22, 2025
Phoenix

Redwood (Spring) Trail Run

March 22, 2025
Oakland

The Big Alta

March 22, 2025
San Rafael

VALENCIA Trail Race

March 22, 2025
Los Angeles

Antelope Island Buffalo Run

March 28, 2025
Salt Lake City

Ancient Lakes 50M/50K/25K/10K

April 5, 2025

Save Mount Diablo Trails Challenge

April 5, 2025
Walnut Creek

Shotgun Trail Blast

April 5, 2025
Eugene

Desert Rats Trail Running Festival

April 11, 2025
Fruita

Gorge Waterfalls

April 11, 2025
Portland

OAT Run (Olympic Adventure Trail Run)

April 12, 2025
Port Angeles

Serengeti Trail Races

April 12, 2025
Salt Lake City

Woodside Crossover 10K, Half, 35K, 50K

April 12, 2025
San Francisco

Napa Valley Endurance Run

April 13, 2025
Napa

Rattler Trail Races

April 19, 2025
Colorado Springs

Rock Hawk Trail Races

April 19, 2025
Denver