Lost Coast 55K

The Lost Coast 55K is a challenging ultramarathon held in Humboldt County, California, starting at the Horse Mountain Creek Trailhead near Whitethorn. Covering 34.3 miles with approximately 6,500 feet of elevation gain, the course features a mix of rough backcountry gravel roads, quiet pavement, and remote terrain. The initial segment includes a tough climb up Saddle Mountain with potential ocean views, followed by a descent to Honeydew, the lowest elevation point, where runners can find refreshments. The return route avoids the steepest sections, with possible water crossings near the finish. The event offers a rugged, scenic adventure in a minimally trafficked area popular with gravel cyclists. Visit the organization's website for the most recent information.