Grizzly Peak Trail Run
Berkeley, United States • 9 May 2026
Grizzly Peak Trail Run
The Grizzly Peak Trail Run takes place on May 9, 2026 at Lake Anza in Tilden Regional Park, Berkeley, CA. The course begins at Lake Anza and runs through Tilden Regional Park. Distances are measured with a Rolatape surveyor's measuring wheel.
The event includes these distances:
- 10K
- Half Marathon
- 30K
- Marathon
- 50K
- Kid's Run, 50 yd dash for 6 years or younger, free
Elevation gain by distance is listed as follows: 10K 1,060', Half Marathon 2,850', 30K 3,910', Marathon 5,700', 50K 6,760'. Course surfaces are primarily single track with substantial dirt road sections and small amounts of asphalt; single track ranges roughly 63 to 75 percent depending on distance.
The course is marked with ribbon approximately every 200 yards and uses color coding for each loop. Polka-dot flagging indicates turns and blue ribbons mark wrong directions. Aid stations are fully stocked every 3 to 4 miles with fresh fruit, salty snacks, assorted candy, water, and Skratch electrolyte drink; runners are advised to carry additional fluids and at least 20 oz between aid stations. The event operates cupless aid stations and offers Hydrapak SpeedCups for sale at check-in.
Additional notes: parking is free, drop bags are allowed for 30K Marathon and 50K, no dogs are allowed on course, all events have a nine hour time limit, and pre-registered runners receive T-shirts and finishers receive custom medals. Visit the organization's website for the most recent information.