Berkeley Trail Adventure

SEP
12
2026
Trail races at Tilden Regional Park in Berkeley with distances from 10K to 50K, cupless aid stations about every 5–7 miles, and a 350-runner capacity.
Sat 12 Sep 2026
50 kilometers 35 kilometers Half Marathon 10 kilometers

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Berkeley Trail Adventure

The Berkeley Trail Adventure is a trail running event at Tilden Regional Park in Berkeley, CA. The event offers multiple distances and runs on shaded and exposed trails with sections of coast live oak and eucalyptus. On clear days some viewpoints include vistas of the bay, the Golden Gate Bridge, and Mount Tamalpais. Aid stations are placed approximately every 5–7 miles and provide a variety of food, sports drinks, and basic first aid supplies. The event is organized as a cupless race; participants must carry their own water bottle or reusable cup. Reusable silicone cups will be available for purchase at the event.

Key facts:

  • 50K
  • 35K
  • Half Marathon
  • 10K

The 50K has an overall time limit of 8.5 hours. Parking is available free of charge at Lake Anza in Tilden Park; carpooling is encouraged. Event capacity is limited to 350 runners across all distances. Early bib pickup is scheduled the day before at Sports Basement in Berkeley; race morning check-in and bib pickup occur at Lake Anza.

Awards include custom trophies for the top three overall male and female finishers at each distance, special sponsor items for each distance winner, custom finishers' medals for all finishers, a pint glass for all 50K finishers, and a Dead Last Finisher award. Age-group medals are awarded three deep across multiple age categories. Volunteer roles support aid stations, setup, check-in, course marshaling, timing, and post-race food; volunteers receive a race T-shirt, food, and potential credit toward future Inside Trail Racing events. Visit the organization's website for the most recent information.

50 km
50k
35 km
35k
Half Marathon
1/2 Marathon
10 km
10k
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