Haul in a Personal Best along
the Western Pacific Trail!


Used in the 1800s to transport gravel for the construction of the western section of the Transcontinental Railroad, the Western Pacific Trail now forms a part of this mostly-flat course where you can haul in a personal best! The marathon course is now USATF certified and can be used to qualify for races like the Boston Marathon!

In addition to the marathon distance, half marathon, 10K and 5K races will also take place.


Registration Fees

5K Race Day Closed

10K Race Day Closed

Half Marathon Race Day Closed

Marathon Race Day Closed

5K No Shirt Closed

without shirt -$5.00, please check on race day for available shirts for $5

10K No Shirt Closed

without shirt -$5.00, please check on race day for available shirts for $5

Half Marathon No Shirt Closed

without shirt -$5.00, please check on race day for available shirts for $5

Marathon No Shirt Closed

without shirt -$5.00

Remote Runner No Shirt Closed

without shirt

Course Information

All races begin and end at Quarry Lakes. The 5K, 10K, half marathon and marathon races go out along the Alameda Creek Trail. Trails are primarily dirt fire trails, with sections that include gravel (used by the parks to prevent erosion) and a short paved section.

Walkers/hikers and runners of all levels are welcome!

All finishers will receive custom finisher medals and custom shirts (cotton and tech shirts available). More info on shirts/awards page.

Age group awards will be awarded to the top 3 finishers in 5 year categories (less for the younger ages).

All races will be professionally timed.

Shirts can only be guaranteed to those who sign up by 4/10, so we recommend early registration.

The marathon will start at 7:30 am, the half marathon at 8:00 am, the 10K at 8:30 am and the 5K at 8:45 am.

The Western Pacific Marathon course is USATF certified! Yes, you can qualify for the Boston Marathon using this race!

All races start and finish in the Quarry Lakes. The marathon, half marathon and 10K have large out-and-back sections on the Alameda Creek Trail. The course is mostly gravel/fire trail with a very small portion of pavement at the beginning and end. Hills are nearly non-existent, so bring on the speed!




Half Marathon



All participants can receive a copy of their appropriate course map on race day.

Each course will be marked with ribbons, flour and signs to help keep runners on the correct course. Volunteers will also be on the course at key locations to help direct runners.

Additional Information


As with all of our races, aid stations will be fully stocked with water, sports drink, gels, pretzels, candy, etc.

Aid stations will be approximately 2-3 miles apart.

Runners who may need more water, should carry their own water bottle or hydration pack.


Bathrooms will be available at the race start/finish area. There are also a few bathroom locations on the course.

Event Schedule

  • April 29 7:30 AM PDT - Marathon Starts

  • April 29 8:00 AM PDT - Half Marathon Starts

  • April 29 8:30 AM PDT - 10K Starts

  • April 29 8:45 AM PDT - 5K Starts

Contact Information

Event Location

Quarry Lakes Regional Recreation Area, Isherwood Way, Fremont, CA, United States

Click here to view map