Trail Running calendar near Arlington Heights 2026-2027

The inaugural Fullerton Fit 5K Trail Run offers a scenic dirt trail course through the Brea Dam area. The event also includes a Health & Wellness Fair with local vendors and food trucks. Registration includes a shirt, medal, and other race..

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 multi-day trail weekend in Big Bear Lake on June 12–14, 2026 featuring a three-day TransRockies stage race plus single-day Holcomb Valley races from 5 to 33 miles, published elevation profiles, and specific entry and refund policies.

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.

The Old Zoo Half Marathon offers a half marathon and a 12K on scenic, flat trails starting at the historic Old LA Zoo. Runners receive a unique elephant finisher medal and other amenities. Early registration is advised as space is limited.

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.

Trail running at Topanga State Park with 10k and new 15k courses, a non-timed Hiker's Delight, a kids 1k, on-course aid, chip timing, and prize purses as part of the Bulldog Challenge Series.

Celebrate the legacy of Title IX in Yorba Linda. Run or walk a moderate 5K on the El Cajon Trail with the family, strollers, and dogs. After the race, visit the vendor fair and explore awards for various age groups.

A 5k trail run at Gypsum Canyon Wilderness on June 24, 2026 over fire roads and single track with about 350 ft of elevation gain. One aid station at mile 2.2 and a cupless race policy.

Experience a weekend of community and trail running in the Angeles National Forest. Challenge yourself to complete multiple laps of a scenic 4.16 mile loop over six hours while enjoying a supported camping experience.

A community July 4 event in Newhall Park featuring a flat, paved 5K along the parade route, a Kid K, and a Masters Mile Walk, with shirts, medals, an expo, and awards benefiting local high school cross-country programs.

A mountain 5k up Mt Baldy Resort with about 1,500 feet of ascent to the Notch, followed by a BBQ, bar and live music at the finish. Runners can return by lift and dogs are not allowed on the lifts.

Valley Crest Trails in Tarzana, Los Angeles offers a half marathon, 10K and 5K on Mulholland's exposed ridgeline. Expect rolling climbs, broad views and hot, dry mid July conditions.

Into the Wild is a 5k trail run at Saddleback Wilderness on July 15, 2026, over fire roads and single track with 300 ft of elevation gain. Entry is limited to 150 runners and there is no race day registration.

Harding Hustle on July 18, 2026 in Silverado CA offers 50K, 30K and 15K trail races on the Harding Truck Trail through the Santa Ana Mountains, with substantial climbing, stocked aid stations and shuttle access for participants.

Tough Mugu at Point Mugu State Park features coastal mountain trail courses of 25k and 10k with ocean views, chip timing, aid stations, handcrafted finisher medals, a post race festival and a $2,000 podium prize purse.

Hot to Trot at Griffith Park on July 18, 2026 features 5k, 10k, 15k and half marathon options on a marked horse trail, with aid station support, finisher medals, free photos and results posted after the event.

Join this summer running event at Whittier Narrows Recreation Area featuring 5k, 10k, 15k, and Half Marathon distances. Enjoy a scenic loop course with finisher medals and snacks included for all participants.

Experience a unique desert night run under the Full Buck Moon on a scenic looped course. Choose between distances ranging from 9 miles to a 50k ultramarathon through manzanita groves and single track trails.