Articles

Belgian Ultrarunner Karel Sabbe's Record-Breaking Pacific Crest Trail Run Showcased in New YouTube Documentary

Explore Karel Sabbe's record-breaking Pacific Crest Trail run in a riveting documentary. Jour..

Trail Running: How it Can Help Reduce Stress and Anxiety

Trail running is an effective way to reduce stress, anxiety, and improve physical and mental he..

Trail Running vs. Road Running: Which One Is Right For You?

When it comes to running, there are two primary options to choose from: trail running and road..

Quicksilver Endurance Runs

Name: Quicksilver Endurance Runs
Start: 2025-05-10
End: 2025-05-10
Location: San Jose

San Jose, United States • 10 May 2025

The Quicksilver Endurance Runs, held in San Jose, CA, features challenging 50K and 100K races on scenic trails through oak forests and meadows, offering stunning views of the Santa Clara Valley and Santa Cruz Mountains. Celebrating its 40th edition, the event supports local non-profits, donating 50% of proceeds to initiatives promoting children's health and trail advocacy. Participants can expect well-stocked aid stations, great swag, and a festive post-race BBQ. Notably, hiking poles are prohibited on the Sierra Azul section of the 100K for 2025. The races start at the Hacienda Entrance of Almaden Quicksilver County Park. Visit the organization's website for the most recent information.

United States California San Jose

Race information

Website Registration

100 km

100K

50 km

50K

Visit the organization's website for the most recent information.

Trail runs nearby

Thursday Nov 28

Zoom Turkey Trot

The Zoom Turkey Trot is a festive running event taking place in San Jose, California, featuring multiple race options including a 5K, 10K, and Half Marathon, along with youth categories and a free Kid's Run. Scheduled for Thanksgiving morning, participants can enjoy a scenic run along the Coyote Cre..

Saturday Nov 30

Quarry Turkey Half Marathon

Fremont - 15 mi from San Jose

The Quarry Turkey Half Marathon is a family-friendly running event taking place on November 30, 2024, at Quarry Lakes Regional Park in Fremont, California. Participants can choose from a half marathon, 10K, or 5K, along with a free Little Turkeys race for children. The event encourages Thanksgiving-..

Saturday Dec 7

Calero Trail Run - Winter

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The Calero Trail Run - Winter, held at Calero County Park in San Jose, CA, offers a variety of trail running distances including 50K, Trail Marathon, 25K, Half Marathon, 15K, 10K, 5K, and a Kids Run. Participants can enjoy scenic single tracks, challenging hills, and dirt paths, making it an excelle..

Saturday Dec 7

Zombierunner Quarry Lakes

Fremont - 15 mi from San Jose

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The ZombieRunner Quarry Lakes event, scheduled for December 7, 2024, in Fremont, California, features a variety of running distances including a 5K, 10K, Half Marathon, 30K, and Marathon, along with youth categories and a free Kid's Run. The scenic course begins at Quarry Lakes Regional Recreation A..

Saturday Dec 14

Summit Rock Half Marathon

Saratoga - 8 mi from San Jose

5 km

10 km

13 mi

The Summit Rock Half Marathon, along with 10K and 5K events, takes place in the scenic Sanborn County Park, Saratoga, CA, on December 14, 2024. Participants can enjoy running through beautiful redwood groves and single-track trails, with the half marathon and 10K featuring challenging ascents and br..

Saturday Dec 21

Inside Trail - Woodside Ramble

Redwood City - 21 mi from San Jose

The Woodside Ramble, organized by Inside Trail Racing, is a scenic trail running event held at Huddart County Park in Woodside, California. Participants can choose from four distances: 10K, Half Marathon, 35K, and 50K, catering to runners of all skill levels. The course features beautiful trails sha..