Hunter S. Thompson Fear & Loathing
Midtown Terrace, United States • 7 Dec 2025
Event overview
The Hunter S. Thompson Fear & Loathing is an annual urban ultrarun in San Francisco, held as the 41st running on December 7, 2025. The event is presented by Haight Ashbury Ultra Society, Zombie Runners, and Fat Ass Runners. Entry has historically been free and the format is a no-fee "fat ass" event. Distances offered:
- 50 Miler
- 50K
The event can serve as a qualifier for the Ohlone Wilderness 50K Trail Run.
Course and logistics
The course is a single loop beginning and ending at Twin Peaks in San Francisco. Surface is primarily city streets - about 99% for the 50K; the 50-mile route includes roughly 20% sections with parallel trail options. Elevation data: total climb approximately 3,600 feet and total descent approximately 3,600 feet; course high point about 847 feet and low point about 10 feet. Start and finish elevation are listed at 766 feet.
Aid stations are not guaranteed but are typically provided from parked cars at approximate mile markers, including Twin Peaks, Marina Green, Coit Tower, Lake Merced, and others. The 50-mile distance has an overall cutoff of 11 hours, with a cutoff at mile 25 of 11 hours 45 minutes from the start. Course records include a 50K time of 3:40:54 (1988) and a 50-mile time of 6:13:54 (1990). Visit the organization's website for the most recent information.