World-Class Adventure Racing in California

Explore our exciting lineup of adventure races. From iconic classics like the multi day Gold Rush Mother Lode to all-day challenges that test your endurance, each race is a unique journey through California's breathtaking terrain.

Upcoming Events

Golden Gate Bridge partially shrouded in fog, viewed from a hillside with trees and rocky terrain during sunrise or sunset.

Gold Rush Adventure Challenge: Dawn to Dusk
12-hour
Saturday, September 19th, 2026

Past Events

A group of cyclists riding on a mountain road with mountainous terrain and trees in the background.

All Out Events Checkpoint Challenge & Mammoth to Bishop 36-Hour Adventure Race

In June 2021, All Out Events and Gold Rush joined to forces to put on two races in one: a 6-Hour Mammoth Checkpoint Challenge and the Mammoth-to-Bishop 36-Hour Adventure Race. This allowed for both newbies to the sport (drawn in by the recurrence of Eco Challenge airing on Amazon Prime) and experienced racers to race together. Both races included kayaking, mountain biking, trekking and navigation in the gorgeous mountains of the Eastern Sierra. The 36-Hour race served as a qualifier for USARA Nationals.

Four cyclists in racing gear and helmets standing with their bikes beneath a finish banner at the Gold Rush Adventure Racing event, with tents and trees in the background.

Summer Challenges

Held at New Melones Lake, these early June races had 4-, 6- and 12- hour options for biking, trekking and paddling through the park with stiff competition from both Northern and Southern Californian teams.

We brought the Summer Challenge back in July 2024 with a 24-hour adventure race and a 6-hour Bike/Trek event at Barrett Cove Recreation Area.

A man with a blue and orange cap, sunglasses, and a sports shirt, holding a map and a punch card, participating in an outdoor orienteering event near a tree with an orienteering control marker hanging from a branch.

Night Os and Day Os

These navigation training events are held in spring and summer (usually on full moons for the Night O) to both teach navigation and provide nav practice for our racers at Lake McClure, our local playground.

Four male hikers walking on a dirt trail at sunset, surrounded by desert shrubs and distant mountains.

Mother Lode Expedition Races

From 2000-2013, Gold Rush organized multi day expedition races in California's Sierra Mountains, combining disciplines like navigation, trekking, biking, ropes and paddling. Mother Lode Races were a staple for the West Coast AR community.

The Gold Rush team is looking to hand the reins over to the next generation of race and course directors to bring the Mother Lode events back on calendars in 2028

A woman in outdoor climbing gear helping another climber on a rocky mountain ridge with a forested landscape in the background.

24- to 36-Hour Adventure Challenges

From 2000 to 2022, Gold Rush organized 24- to 36-hour (with one eight-hour “Cold Rush”) Adventure Challenge races in California's Stanislaus National Forest, combining disciplines like navigation, trekking, biking, ropes and paddling.

We’re working on permitting for a 2026 Adventure Challenges in Mount Tam, California.