Trail Running calendar near Lakeview 2026-2027

A two-day Spartan Trifecta Weekend at Big Bear Mountain Resort featuring Sprint, Super and Beast obstacle races at high altitude with long climbs and descents; kids races and spectator access are also available.

Trail races at O'Neill Park in Trabuco Canyon, California on Saturday, May 16, 2026. Distances range from 10k to 50k; registration closes May 1 and entries are nonrefundable with a rollover option if canceled for weather or fire.

A 10 km high altitude trail race at Snow Summit near Big Bear on May 17 2026. The route follows singletrack through pine forest with technical climbs and a three hour finish cutoff.

A multi-distance loop ultrarun at a private ranch in Riverside, CA, featuring one-mile laps, timed solo and relay options, free on-site camping, and awards for distance milestones over Memorial Day weekend.

A mountain trail race in Sierra Madre on May 23, 2026 featuring an 8.6 mile out-and-back course from Kersting Court to Orchard Camp, a Kids Fun Run, and community-led trail repair efforts supported by the Fletcher Trail Maintenance Fund.

Muddy Dash in San Diego is a mud based obstacle course of up to 3 miles with running, crawling and water obstacles. The organizer lists value and VIP registration options while the exact venue and address remain to be determined.

A one-day event at Hahamongna Watershed Park on May 24, 2026, offering a 50K team relay, a 50K solo ultramarathon, and a 10K Fun Run for solo participants.

A 5k trail run at Black Star Canyon in Silverado, California, with mixed fire road and single track, 390 ft elevation gain, one aid station, a cupless policy, and pre-run access restricted to authorized days.

A spring trail event in the Angeles National Forest offering a 50k and a half marathon across Pacifico Mountain with technical singletrack, multiple aid stations and a finish festival. The 50k awards Sterling Silver Tickets and a course rec..

Annual 5K and 10K run and walk in Rolling Hills Estates on May 30, 2026, with a scenic route on the city bridle trails and awards for overall and age-group first place finishers.

Free, social group run by Aravaipa at El Moro and Laguna Coast Wilderness Park in Newport Coast on May 30, 2026. The route is about 5.5 miles with roughly 500 feet of ascent, some rocky sections, and post-run snacks and a raffle.

A 50 mile out and back on the Pacific Crest Trail in Cleveland National Forest on June 6, 2026. The route gains about 7,500 feet between 3,000 and 6,000 feet and includes multiple staffed aid stations and specified crew access rules.

The City of Fullerton’s inaugural Fullerton Fit 5K Trail Run takes place June 6, 2026 on a dirt course near Brea Dam, accompanied by a Health & Wellness Fair with vendors, demonstrations, and food trucks.

An unsanctioned, route-choice run in Chino Hills on June 6, 2026 covering more than 4 miles over gravel and trail. Runners navigate four checkpoints on an open course and compete for cash prizes.

A trail marathon relay and 8K in Griffith Park on June 7, 2026, featuring a true loop course with varied terrain, team relays or solo 8K, three aid stations, chip timing, race shirts and medals, music, food trucks and cash awards.

A three day TransRockies style stage race and single day trail races in Big Bear Lake on June 12 to 14, 2026, featuring distances from 5 to 33 miles with substantial elevation gain and courses pending USFS approval.

A multi-distance trail running event at Griffith Park on June 13, 2026, offering 5k, 10k, 15k and a half marathon on hard-packed horse trails with an aid station, finisher medals, free photos, and posted results.

A second annual running event at the Old Los Angeles Zoo area on June 14, 2026, offering a half marathon and a 12K on relatively flat, scenic trails. Registration runs November 21, 2025 to January 26, 2026 with fees from $49.

Los Mugrosos 5K - La Vida Sucia Run in South El Monte, CA on June 14, 2026 features a scenic single-loop 3.1 mile trail and a 0.3 mile kids dash, with shirts and finisher medals included and a 90-runner limit for the 5K.

Orange Curtain Run in Orange County, California offers a range of distance and timed events from 10K to 100K on mixed pavement and bike path surfaces. The event is scheduled for June 19 and 20, 2026 and includes a certified marathon.