Rim Rock 50 Mile Trail Challenge

We’re thrilled to welcome you to the very first Rimrock 50 Mile Trail Challenge—a bold new endurance event that showcases the breathtaking beauty and rugged terrain of Napa’s finest trail systems. This isn’t just another race—it’s a journey through history, wilderness, and the raw edge of adventure.

Your challenge begins in the heart of Skyline Wilderness Park, winds through the scenic Napa Open Space Preserve, and ventures deep into the newly opened Suscol Headwaters Trail System—a pristine and rarely accessed stretch of wild hills, oak forests, and sweeping valley views.

Whether you’re here to race, push your personal limits, or just soak in the spirit of the trail running community, you’re part of something special. Thank you for being part of year one. Let’s make it epic.

The Rim Rock course features two rugged loops through Skyline Wilderness Park, the Napa Open Space Preserve, and the new Soscol Headwaters Trail system. Each loop is approximately 26 miles. Solo runners will complete both loops (about 52 miles total), while relay teams of two will each complete one loop.