Half Marathon

A half marathon is a challenging yet achievable distance for many runners, measuring 13.1 miles. Start with a half marathon, then check out our list of full marathons.

Knickerbocker Canyon 5K, 10K, Half, 35K

March 22, 2025
Auburn

Redwood (Spring) Trail Run

March 22, 2025
Oakland

VALENCIA Trail Race

March 22, 2025
Los Angeles

Western Pacific Half Marathon

March 29, 2025
Fremont

Golden Gate Headlands Marathon, Half Marathon & 10K

April 5, 2025
San Francisco

Mudslinger Trail Run Half Marathon

April 5, 2025
Blodgett

Save Mount Diablo Trails Challenge

April 5, 2025
Walnut Creek

Annadel Half Marathon

April 6, 2025
Santa Rosa

Catalina State Park Trail Races

April 6, 2025
Tucson

Zion Ultras

April 11, 2025
Apple Valley

Lake Sonoma 50 Mile

April 12, 2025
Sonoma

OAT Run (Olympic Adventure Trail Run)

April 12, 2025
Port Angeles

Serengeti Trail Races

April 12, 2025
Salt Lake City

Whiskey Basin Trail Runs

April 12, 2025
Prescott

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

April 12, 2025
San Francisco

Vail Scramble

April 13, 2025
Vail

Sierra Azul Trail Challenge

April 19, 2025
San Jose

Squak Mountain

April 19, 2025
Seattle

Vortex Ultra Experience

April 19, 2025
Tucson

Mt. Tam Wild Boar Half Marathon

April 26, 2025
San Francisco