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, taking place in San Jose, CA, features both 50K and 100K races on scenic, hilly trails. Celebrating its 40th edition, the event offers participants a chance to run through beautiful oak forests and meadows, with stunning views of the Santa Clara Valley and Santa Cruz Mountains. The challenging courses are supported by friendly aid stations, making it an excellent choice for first-time ultra-marathoners. Notably, 50% of the race proceeds benefit non-profits focused on children's health and trail advocacy. The event emphasizes community involvement, relying on over 100 volunteers to ensure a successful race day. Visit the organization's website for the most recent information.

United States California San Jose

Race information

Website Registration

100 km

13000 m+

100k

50 km

6000 m+

50k

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

Trail runs nearby

Saturday Apr 5

Santa Teresa King Richard Annual Trail Run

The Santa Teresa King Richard Annual Trail Run is a cherished event held at Santa Teresa County Park in San Jose, CA, designed to honor the legacy of Richard Limb. Participants can choose from various distances, including a half marathon, 10-mile, 10K, and 5K, all set against the park's stunning lan..

Saturday Apr 12

Lake Chabot Trail Run

Castro Valley - 26 mi from San Jose

...

The SPASM Lake Chabot Trail Run is a multi-distance running event taking place at Lake Chabot Regional Park in Castro Valley, California. Scheduled for April 12, 2025, the event features various race options including an 8K, Half Marathon, 30K, Marathon, and 50K, along with a free Kid's Run for chil..

Saturday Apr 12

Woodside Crossover

Redwood City - 21 mi from San Jose

50 km

The Woodside Crossover is a trail running event taking place on April 12, 2025, 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 scenic trails through redwood fo..

Saturday Apr 19

Sierra Azul Trail Challenge

...

The Sierra Azul Trail Challenge is an exciting running event taking place in the scenic Sierra Azul Open Space Preserve, near San Jose, CA. Participants can choose from various distances, including a 50K, Trail Marathon, 20 Mile, Half Marathon, 7 Mile, and 5K. This challenging race offers a unique o..

Saturday Apr 19

Badger Cove Half Marathon

Livermore - 25 mi from San Jose

5 km

10 km

13 mi

The Badger Cove Half Marathon, along with 10K and 5K events, will take place on April 19, 2025, at Del Valle Regional Park in Livermore, California. This race, part of the Brazen Racing Ultra Half Series, offers participants a scenic run through the emerald hills of Lake Del Valle. All runners will..

Saturday Apr 19

Go Wild Peninsula 4 Hr San Carlos

San Carlos - 23 mi from San Jose

4 hr

The Go Wild! Peninsula event in San Carlos offers participants a thrilling 4-hour trail and wilderness scramble amidst beautiful spring wildflowers and scenic views. Teams of 1 to 5 will navigate using a custom map to locate up to 24 checkpoints along the trails and natural landscapes of Redwood Cit..