A half marathon is 13.1 miles, but course and race-day arrangements vary. Compare confirmed cutoff details, start locations and packet pickup before choosing. Separate same-day routes are listed individually.
23 recorded distance events across 22 race families. This selection covers 2026-10-12 through 2027-10-12 (end date excluded), a 12-month planning window reviewed 2026-10-12. It is a growing selection, not a complete calendar or a promise of entry availability.
Dates below come from recorded source snapshots, not a fresh organizer check on the page-review date. Some checks are overdue. Search current upcoming races before making plans.
A Mount Diablo trail half marathon with climbs and potential mud or creek crossings. The organizer welcomes walkers; review the current course and time limits.
A road half marathon through the vineyard-lined back roads of Clarksburg, starting and finishing at Delta High School. It is part of a race day with several other distances.
A San Francisco half marathon crossing the Golden Gate Bridge with staging near Aquatic Park. Earlier entry tiers are sold out and the page offers VIP registration; confirm remaining entry options.
A certified half marathon along Cannery Row and the Pacific Grove shoreline. General entry is sold out; check the organizer for available entry options.
Thanksgiving-weekend half marathon, 10K and 5K at Quarry Lakes Regional Park. Routes are mostly dirt fire trails with short paved sections; walkers are welcome.
A hilly trail half marathon through redwood groves and single-track trails at Sanborn County Park. This Ultra Half Series race may exceed 13.1 miles; check the official course.
A trail half marathon around Lake Chabot to close the year. The optional two-day challenge combines separate half marathons; it is not a single marathon event.
A New Year’s Day trail half marathon at Lake Chabot. It is part of the Ultra Half Series; check the official course distance, hills and cutoff before entering.
Winter road races in Carlsbad with oceanfront sections. Full and half marathon starts differ; check the organizer’s course and race-weekend instructions for your distance.
A February half marathon through Golden Gate Park, the Panhandle and the Pacific shoreline. This is a separate event from the July San Francisco Marathon.
Half marathon, 10K and 5K starting and finishing at San Leandro Marina Park along bayside routes. Check the distance-specific map and current entry details.
A half marathon starting near the Craneway Pavilion and following the San Francisco Bay Trail. The official calendar and current countdown confirm February 20, 2027; older page text still mentions 2026.
Point-to-point marathon and half-marathon routes from the Ojai area to downtown Ventura, using paved valley trails. Both distances start away from the finish; review shuttle instructions.
One-loop road races through Oakland. The full marathon includes the Bay Bridge trail; the half follows a separate route around Oakland landmarks. Confirm the route before choosing a distance.
Point-to-point road races finishing near the Ventura beachfront. The full starts in Ojai and the half in Oak View; check separate start-line and shuttle instructions.
A coastal half marathon from the Santa Cruz Beach Boardwalk toward Wilder Ranch State Park, returning along West Cliff Drive to finish at Cowell’s Beach.
The 50th anniversary event offers a full marathon and two half-marathon routes. Review the organizer's route and start-time details before choosing an event.
The 50th anniversary event offers a full marathon and two half-marathon routes. Review the organizer's route and start-time details before choosing an event.
The full and half marathon start and finish in downtown Santa Rosa on Sunday. The shorter-distance races take place the previous day. Check distance-specific course and packet-pickup details.
