Grizzly Peak Trail Run

Event overview

The Grizzly Peak Trail Run takes place on Sat May 9, 2026, at Lake Anza - Tilden Regional Park in Berkeley, CA 94708. The event offers multiple distances including a free Kid's Run for children 6 years and younger (50-yard dash). Parking at the venue is free. All events have a 9-hour time limit. Pre-registered runners receive a T-shirt; all finishers receive a custom medal and 50K finishers also receive a custom coaster. Top three male and female overall finishers at each distance receive awards and race credits; top three in each age group and gender receive medals.

Distances

• 10K
• Half Marathon
• 30K
• Marathon
• 50K
• Kid's Run (6yo & younger, 50yd dash) - Free

Course and logistics

Races start and finish at Lake Anza and run through Tilden Regional Park. Courses are color coded and marked with ribbon approximately every 200 yards; polka-dot flagging indicates turns and blue ribbons mark wrong directions. GPX files are provided for each distance. Aid stations are fully stocked every 3 to 4 miles with fresh fruit, salty snacks, candy, water, and Skratch electrolyte drink; runners are advised to carry at least 20 oz. of water between aid stations. The event is cupless - participants should bring their own fluid container; a limited number of Hydrapak SpeedCups will be available for purchase at check-in.

Surfaces and elevation

Elevation gain and course surface by distance are provided, for example: the 10K has 1,060' gain (single track 75%, dirt road 19%, asphalt 6%); the 50K has 6,760' gain (single track 65%, dirt road 32%, asphalt 3%). The half marathon, 30K, and marathon have intermediate profiles and surface mixes. Timing uses BibTags by MyLaps. Visit the organization's website for the most recent information.