Western Pacific Marathon

Fremont, United States • 28 Mar 2026

Event overview

Western Pacific 2026 is a running event on March 28, 2026 at Quarry Lakes Regional Recreation Area, 2100 Isherwood Way, Fremont, CA 94536. The event offers three in-person race distances and a remote runner option. The organizer notes the course follows sections of the Western Pacific Trail and Alameda Creek Trail.

Course and format

Distances:

  • Half marathon
  • 10K
  • 5K

All races begin and end at Quarry Lakes. The 10K and half marathon routes use the Alameda Creek Trail. The course is described as mostly flat and follows trails that are primarily dirt fire roads. Some sections include gravel used for erosion control and there is a short paved section. Hikers, walkers, and runners are welcome. Visit the organization's website for the most recent information.

Race information

Half Marathon
Half Marathon
10 km
10k
5 km
Visit the organization's website for the most recent information.
Trail runs nearby

Take on twisty dirt trails and big climbs around Montara Mountain at San Pedro Valley Park. Choose 10K, half marathon or 30K with aid stations, cupless racing and finisher medals for all.

A two day trail event in San Francisco that crosses the Golden Gate Bridge and runs the Marin Headlands. Multiple distances from 15K to 50 mile are offered and the event serves as the final stop of the Spartan Trail World Championship.

Runs at Coyote Hills Regional Park in Fremont, California on January 31, 2026. Courses include a half marathon, 10K and 5K over dirt, pavement and marsh boardwalks with bay views.

Test your legs on scenic Sierra Azul trails at Mt Umunhum Trail Conquest Winter, with distances from a kids run to 50K and routes that summit Mt Umunhum and Bald Mountain. Finishers earn commemorative medals and aid stations keep you fueled..