Grizzly Peak Trail Run
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Grizzly Peak Trail Run : May 9, 2026, Berkeley, CA
The event starts at Lake Anza in Tilden Regional Park and offers multiple trail distances through the Berkeley hills. Distances include:
- 10K
- Half Marathon
- 30K
- Marathon
- 50K
- Kid's Run (6yo & younger, 50 yd dash) - Free
Parking at the venue is free. Drop bags are allowed for the 30K, Marathon, and 50K at the Start/Finish. T-shirts are provided to pre-registered participants; all finishers receive a custom medal and 50K finishers also receive a custom coaster. There is a 9-hour time limit for all events.
Course, aid, and rules
Courses are measured with a Rolatape surveyor's wheel and marked with ribbon approximately every 200 yards. Color coding: 10K = yellow loop, Half = pink loop, 30K = Half + yellow, Marathon = Half twice, 50K = Marathon + yellow. Polka-dot flagging indicates turns; blue ribbons mark wrong ways.
Aid stations are fully stocked every 3-4 miles with fresh fruit, salty snacks, candy, water, and Skratch electrolyte drink. Runners are advised to carry extra fluids; events are cupless so participants should bring their own fluid container. Headphones are permitted on dirt-road sections only. No dogs are allowed on the course. The organizer notes the presence of poison oak and occasional bees or yellow jackets. Visit the organization's website for the most recent information.
