California
California Trail Running Calendar 2026-2027
Explore the best trail runs in California for 2026-2027! Our updated list features 400 exciting trail runs across the region. Find your next trail run in California below and join the trail community at these great events!
October 2026
Trail races at Almaden Quicksilver County Park offering a half marathon, 10K and kids 1 mile with historic mining views and local conservation support.
Charitable 5K at Sequoia Park in Eureka on October 17, with proceeds to Sequoia Humane Society, a dog friendly loop through redwoods, plus a raffle and adoption opportunities.
Free social trail run in Newport Coast covering about 6.5 miles and 1,000 feet of climb, on hilly and rocky trails; participants should have trail experience.
Trail races in Upper Bidwell Park offering a half marathon and two 4 mile options, including an hourly eight-loop endurance challenge with aid stations and on-course support.
A trail event at Hahamongna Watershed Park offering 5K, 10K and a half marathon with marked courses, chip timing, aid stations and commemorative wooden medals.
A themed charity run and community festival on October 18, 2026 in Downtown Roseville, CA, supporting the bleeding disorders community. The day includes a timed 5K, a one mile walk, festival food, carnival games, and a remembrance ceremony.
Annual Pumpkin Run in Half Moon Bay on October 18, 2026 with 5K, 10K, half marathon and a kids fun run along the Pacific Coastal Trail benefiting Senior Coastsiders.
A looped trail event in Lassen National Forest with multi-hour challenges, a stocked aid station, burro race options, and awards including swag and a cash prize.
A Backyard Ultra at Beals Point where runners repeat a 4.16 mile loop each hour until one remains; a Mini offers the same format with a 12 hour limit.
Backyard Ultra at Beals Point features hourly 4.16-mile loops until one runner remains, plus a 12-hour Mini option and a single aid area at the start/finish.
The San Diego 200 is a 200 mile endurance race through diverse coastal, mountain, and desert terrain with an 82 hour time limit and mandatory crew support.
Trail race at Los Coyotes Reservation on October 23 and 24, 2026 offering Single Loop, 6H Ultra and 24H Ultra across desert and alpine trails.
Trail SoCal is an October 23-24, 2026 team trail relay at Los Coyotes Reservation near Warner Springs, CA featuring 112.8 miles and 23,800 feet of elevation gain.
Experience the oak-studded hills and rugged canyons of Yucaipa in an 8 hour endurance loop or a fast 6K trail race.
Remote, self supported on and off trail foot event at Oxbow Reservoir with three escalating routes from about 15 to 43 miles.
Trail races in Cheeseboro Canyon offering 50k, Half Marathon and 10k courses across varied singletrack, fire roads and scenic climbs with aid stations and post-race festival amenities.
Multi-distance trail event on the Gaviota Coast with ocean views, ridge climbs, varied terrain and options from 12K to 100 miles.
Experience the autumn scenery of Jenkinson Lake at the Trail Run at Sly Park. This event offers distances from a 5K to a 50K ultra on shaded pine forest trails with rolling hills and lakeside views.
Trail race at Salmon Falls Ranch with a one lap 10K and a two lap half marathon on singletrack trails, aid stations, and shuttle support for parking.