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.

San Lorenzo River Trail Run

July 12, 2025
Santa Cruz

Siskiyou Out Back

July 12, 2025
Ashland

The Peak 50k/Marathon/Half Marathon

July 12, 2025
Julian

Silverton Alpine Runs

July 19, 2025
Silverton

Never Summer 100K/60K

July 25, 2025
Fort Collins

Speedgoat Mountain Races

July 25, 2025
Salt Lake City

Standhope Ultra Challenge 100mi, 60K & 30K

July 25, 2025
Sun Valley

Pikes Peak Ultra

July 26, 2025
Colorado Springs

Volcanic

August 2, 2025
Mt St Helens

Rodeo Valley 8K, Half, 30K, 50K

August 3, 2025
San Francisco

Skyline 50K Endurance Run

August 3, 2025
Castro Valley

Larrabee Lakes Trail Run

August 9, 2025
Bellingham

Wy'east Trailfest

August 9, 2025
Mt. Hood

Redwood (Summer) Trail Run

August 16, 2025
Oakland

Harriman 25K/50K Trail Run

August 23, 2025
Island Park

Six-O Trail Run

August 30, 2025
Fort Worth

Backcountry Rise

September 6, 2025
Mt St Helens

Diablo Trail Run

September 7, 2025

The Rut Mountain Runs

September 12, 2025
Big Sky

TransRockies Golden Ultra

September 12, 2025