Provides general information on the sport, especially focusing on northern California. Includes information and statistics for the top races in the USA, as well as personal achievements, and goals.
Stan Jensen's Ultramarathon Guide
Run100s (Run Hundreds) - A Not-For-Profit UltraRunning Corporation
2024-07-05
Sports, Running, Trail Running, Ultramarathon - Stan Jensen's Ultramarathon Guide. Provides general information on the sport, especially focusing on northern California.