Sean O'Brien 100K

The Forever Brave Half Marathon in Valencia, California, is part of a multi-distance running event held at West Creek Park. Participants can choose from 5k, 10k, 15k, or the half marathon, which consists of three 4.37-mile loops on an easy-to-follow out-and-back trail course. Aid stations are availa..

The Pasadena 50K Relay & 50K Solo event is set to take place on May 25, 2025, at Hahamongna Watershed Park. This exciting race features a 50K Relay, where teams of up to five runners can compete against each other, making it a great opportunity for friends, family, or running club members to join fo..

The Malibu Canyon Trail Races, held in Malibu, California, offer a challenging and scenic running experience through the coastal Santa Monica Mountains. The event features multiple distances including 100K, 50-mile, 50K, 30K, and a half marathon, catering to a wide range of trail runners. The course..

The Griffith Park Trail Marathon Relay & 8K is a celebrated outdoor running event held in Los Angeles’ expansive Griffith Park. Recognized as one of Runner’s World’s 10 Best Races You’ve Never Heard Of in 2024, it offers scenic trails and challenging terrain suitable for both seasoned runners and be..

The Red Rock Rumble is a challenging trail running event held in Topanga, California, set amidst the scenic Red Rock Canyon. The race features a rugged 10k course with steep climbs, stunning views, and a thrilling descent, along with additional events like a non-timed Hiker's Delight and kids' races..

Tough Mugu is a challenging trail running event held in Point Mugu State Park, California, featuring scenic coastal mountain courses. The race includes a 25k and a 10k, attracting competitive runners and outdoor enthusiasts. Participants enjoy epic views of the coastline, mountain peaks, and valleys..