Trail Running calendar near Arlington Heights 2025-2026

Run the Coast to Crest 10K or 5K on scenic Del Mar trails, with mostly flat, hard packed dirt and wide lagoon views. This out and back race is the final Championship Qualifier of the Sunshine Series and finishes with a fun downhill.

Run the Griffith Park Trail Marathon in Los Angeles, a scenic out and back through single track trails and fire roads that reaches the Hollywood sign summit. Options from 10K to 50K make it perfect for beginners and ultrarunners alike.

Challenge yourself at the Billy Goat Mountain Climb near Silverado with steep climbs and sweeping views through Cleveland National Forest. Choose a 17 mile loop, half marathon or 10K and finish with a medal, race shirt and post race snacks.

Celebrate Easter with Hoppy Easter at Griffith Park in Los Angeles, offering 5k to half marathon options on scenic dirt horse trails shared with other park users. Enjoy custom finisher medals, on course aid and a festive outdoor vibe.

Hit the trails at Crystal Cove for Rock It in El Moro Canyon on April 4, 2026, choose a scenic 6K or challenging 10 Miler with climbs, descents and Pacific Ocean views. Run or hike, and enjoy a shirt, race photos and a finisher medal.

Run scenic trails at the Nature Made Great Race in Agoura Hills with distances from 1 mile to a half marathon and combo events. Enjoy a big post race party with food, music and shopping or join virtually.

Explore scenic trails at Diamond Valley Lake during Bedrock Valley Trail Runs, a weekend of trail races and gravel bike courses. Chip timed and cupless so bring your own hydration, with finisher shirts and medals for finishers.

The Oriflamme 50K near Julian, CA offers sunrise views over Anza Borrego as the route drops from the Pacific Crest to Blair Valley. Limited to 150 runners, this out and back features varied trail footing, full aid, and a 9 hour cutoff.

Badwater Salton Sea is an epic team ultramarathon from the Salton Sea to Palomar Mountain, mixing road and single track through desert and mountain scenery. Teams of two or three tackle 81 miles in a small, supported field.

Run a scenic 5K on trails and roads through Ramona Wine Country with mud, hills and a choice of one or two loops, then stick around for a fun Beer Mile and wine tasting. Live music, pizza and proceeds supporting veterans add to the festival..

Run the Natro Noli trail race on Soboba Reservation in San Jacinto CA with marathon, half, 5k and kids 3k on scenic rugged single track. Limited to 100 runners and raising funds for a Noli student scholarship, with shirts and awards.

Run ocean view trails in Malibu at the Point Mugu Trail Run, with 13.3 mile and 6.9 mile courses that climb scenic switchbacks and ridge lines. Finish to a lively post race festival with food, beer garden, awards, music and finisher medals.

Machete Trail Madness 100k at Lake Perris on April 25, 2026 offers 10k, 50k and 100k trail races on very technical terrain with steep climbs and stunning lake views. Camp at the start, enjoy aid stations and free race photos.

Run rugged, scenic trails with punchy climbs at Las Virgenes Canyon Ultra in Woodland Hills, Los Angeles on April 25, 2026. New 100K joins a range of distances from 6K to 84K, with full support, music and post race swag.

San Diego 100 is a rugged 100 mile loop ultramarathon around Lake Cuyamaca on May 1 and 2, 2026, featuring mostly single track mountain trails and about 15,400 feet of climbing. With a 32 hour time limit it serves as a Western States 100 qu..

Run scenic vineyard trails at Orfila Vineyards in Escondido on May 2, 2026 and celebrate with a private post race wine tasting. Choose 3, 6 or 9 mile laps, enjoy food trucks, a finisher medal and limited registration for 400 runners.

Run the O'Neill Park Trail Races on Saturday May 16 2026 in Trabuco Canyon with distances from 10k to 50k through oak and sycamore canyons. Scenic singletrack, rolling climbs and coastal scrub create a memorable trail race experience.

Bring 80s martial arts vibes to the LA River Path at the Cobra 5Kai, 10Kai and Half Miyagithon on May 16, 2026 in Canoga Park. Expect retro music, themed signage, costumed fun, a finisher medal and a same day virtual option.

Race the 10K Spartan Trail at Big Bear on May 17, 2026, across technical singletrack in high altitude pine forest with sweeping Southern Sierra views. The weekend includes Spartan obstacle races and a GOVX service member discount.

Nanny Goat is a Memorial Day weekend multi distance ultrarun at a Riverside horse ranch where you run timed laps on a flat 1 mile loop. Camping, family friendly amenities and medals for every runner who completes at least one lap.