Trail Running calendar near Brea 2026-2027

A two-day Spartan weekend at Big Bear Mountain Resort featuring Sprint, Super and Beast obstacle races at high altitude, plus a kids race and spectator options. The layout includes long climbs and descents and a Trifecta opportunity.

O'Neill Park Trail Races in Trabuco Canyon, California, feature multiple trail distances on May 15, 2027. Registration opens December 1, 2026 and the event has a no-refund policy with rollover options if canceled for weather or fire.

A scenic trail run at Snow Summit in Big Bear Lake, featuring flowy singletrack, technical climbs and descents, Southern Sierra views, wildlife, wildflowers, and a Trail 10K distance on May 16, 2027.

A high country trail event in the Angeles National Forest offering a 50k and a 13.1 mile half marathon, substantial elevation, multiple aid stations, finish festival amenities and a $500 course record bonus for the 50k.

Trail races in Malibu Canyon on June 5, 2027, across single track and fire roads in the coastal Santa Monica Mountains. Distances range from a half marathon to 100k, with athlete guides available for each race.

A trail event in Griffith Park offering a 26.2 mile team marathon relay and a single-loop 8K. Features chip timing for the relay, aid stations with medical staff, shirts, medals, prizes, food vendors and live DJs.