Hunter S. Thompson Fear & Loathing

Hunter S. Thompson Fear & Loathing in San Francisco is an urban ultramarathon offering 50K or 50 miles. Located in San Francisco, the single-loop course starts and finishes atop Twin Peaks, with the city spread out beneath.

The 50K route is about 99% city streets; the 50-mile option includes some trail sections (about 20% parallel trails). Elevation gain and descent total roughly 3,600 feet each, with Twin Peaks at the high point. Known for a “no fees, no awards, no aid, no wimps” ethos, aid is informal and not guaranteed, often provided by cars/vans along the route.

It emphasizes urban adventure and navigation. Visit the organization's website for the most recent information.