Spartan Trail - San Jose Trail Challenge

SEP
27
2026
Trail running in shaded redwood forest at Sanborn County Park on September 27 2026, with 10K, half marathon and 50K options; steep singletrack, shuttle parking, chip timing and specific mandatory gear for the 50K.
Sun 27 Sep 2026
50 kilometers Half Marathon 10 kilometers

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San Jose Trail Challenge - Spartan Trail

Sanborn County Park in Saratoga, California hosts a multi-distance trail running event on September 27, 2026. The course runs on soft singletrack through shaded redwood groves on the eastern slopes of the Santa Cruz Mountains. Average conditions for the season are listed as autumn with an average temperature near 28ºC / 82ºF and an average altitude around 420 meters / 1400 feet.

Distances on offer:

  • 10K
  • Half Marathon (21K)
  • 50K

Trails in the park are described as well groomed but steep and technically demanding, with sustained climbs and descents and generally good footing on flowy singletrack through dense forest. There is no onsite parking for racers; participants are required to use offsite parking and shuttle service to the venue. Race operations include chip timing and visible bib requirements. For the 50K distance a 500 ml water carrying vessel is mandatory. Participants must carry out their trash and dispose of it at aid stations; littering can result in disqualification. Recommended items noted by the organizer include hydration options, warm breathable layers for cooler conditions, rugged trail shoes, and optional trekking poles. Two nearby commercial airports are San Jose and San Francisco. Visit the organization's website for the most recent information.

50 km
50k
Half Marathon
Half Marathon
10 km
10k

Events nearby

Trail races at Huddart Park, King's Mountain and Bear Gulch offer measured distances from a 50 yard kids dash to a 50K, with fees listed per distance and registration opening November 11, 2025.
Trail trail race in Cupertino offering a Half Marathon, 11K and a 2.5 mile charity Lollipop Loop with aid stations, swag, prizes, and a post-race barbecue.
A trail running event at Calero County Park offering distances from a kids run to a 50K across single-track and dirt roads, with named aid stations, drop bag support, bib color assignments, and time limits for longer races.
A trail race at Almaden Quicksilver County Park with distances from 5K to 50K. Courses are out-and-back, marked with colored ribbons, include aid stations and toilets, and the longer races reach Bald Mountain and Mt. Umunhum.
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