Western Pacific Marathon

Fremont, United States • 28 Mar 2026

Western Pacific 2026

The Western Pacific 2026 takes place at the Quarry Lakes Regional Recreation Area in Fremont, California. This running event utilizes the Western Pacific Trail, a path that was used during the 1800s to transport gravel for the construction of the western section of the Transcontinental Railroad.

The course is characterized as being mostly flat. Participants can choose from three primary on-site race distances:

  • Half Marathon
  • 10K
  • 5K

In addition to the physical races at the recreation area, a Remote Runner registration option is available for those who wish to participate from a different location.

The event supports the East Bay Regional Parks Campership Program through an integrated fundraising effort. Registration for the event includes options for team participation, registration transfers, and gift registrations. The venue address is 2100 Isherwood Way, which is managed by the East Bay Regional Park District. 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

Run along the scenic Pacifica coastline in the Mori Point 7K. This event features a flat course through the Mori Point National Recreation Area using a mix of trails and paved paths.

Experience the scenic beauty of Mount Diablo with trail races ranging from 5K to 50K. Support local land preservation while enjoying a professional event featuring a post race BBQ in Walnut Creek.

Experience a scenic trail run around Lake Chabot and the surrounding hills of Castro Valley. With distances from a 50 yard dash to a 50K ultramarathon there is an event for everyone at this regional park.

Experience the hills of Del Valle Regional Park in Livermore with a flat 5K or hilly 10K and half marathon. All participants receive a custom medal and t-shirt with professional chip timing included for all distances.