Western Pacific Marathon

Fremont, United States • 27 Mar 2027

Western Pacific 2027

Western Pacific 2027 is a running event held on March 27, 2027, at Quarry Lakes Regional Recreation Area, Isherwood Way, Fremont, California (2100 Isherwood Way, 94536). The advertised course follows sections of the Western Pacific Trail, a route with historical use in the 1800s for transporting gravel for the western section of the Transcontinental Railroad. The course is described as mostly flat.

The event offers multiple race choices:

  • Half Marathon
  • 10K
  • 5K

There is also a Remote Runner option available for participants who run off-site. Registration uses tiered pricing with Super Early, Early, and Regular periods listed for each distance. The event page lists specific registration price points for each tier.

The event listing includes a fundraising component tied to the East Bay Regional Parks Campership Program and provides a donation option. Event materials include photos of the venue and the course. Contact is listed as Race Director and the event references additional details on a race organizer site. 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

A historic 50k loop from and back to Lake Chabot Marina in Castro Valley with strong aid station support, a half marathon option, plant-based post-race food, and race swag including a shirt, socks, and medal.

Bear Creek on August 8, 2026 offers 5K, 10K and a 13.32-mile half marathon in the Briones Regional Park area, with a virtual Remote Runner option. Entry windows and fees are listed for each race.

Experience the trails of Redwood Regional Park in Oakland. Runners can choose from distances ranging from a 50 yard kids dash to a 50K ultramarathon through scenic ridge lines and redwood groves.

Trail races on hilly mixed dirt and single track at Almaden Quicksilver Park with distances from 5K to 50K, aid stations, drop bag service for longer races, and mandatory course markings and cutoffs.

Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.