Trail Running calendar near Irvine 2025-2026

Join the Cahuilla Rez Ultra in Anza, CA on Oct 17, 2026, a Native organized fundraiser celebrating Cahuilla culture and supporting youth. Choose from 100 mile, timed loop events, half marathon or a community 5k.

Explore trails at Lake Hodges in San Diego on October 17 and 18, 2026 at the Trail Festival, featuring trail runs, mountain biking and a new off road run, bike, run challenge. Distances range from kids fun runs to a 50K for seasoned racers.

Celebrate SPACEROCK Trail Race at Vasquez Rocks on October 17, 2026 with 5K to 14 mile options across technical, rocky canyons and single track. Mark the 10th anniversary with rugged scenery, on course aid, and finisher swag and photos.

Challenge yourself on scenic trails at the Caspers Trail Races in Caspers Wilderness Park on October 24, 2026. Choose distances 10k to 50k and enjoy rugged singletrack, supportive aid stations and a festive finish line.

Take on rugged trails and big climbs at the Saddleback Marathon in Silverado, CA on November 7, 2026, with Marathon, Half Marathon and 10K options. Scenic canyon routes, steep elevation and a true backcountry running challenge await.