40th Ruth Anderson Ultra 50km
40th Ruth Anderson Ultra 50km is a 50 km ultramarathon in San Francisco, CA, United States, taking place on Oct 10, 2026.
- Date
- Oct 10, 2026
- Distance
- 50 km
- Location
- San Francisco, CA, United States
- Format
- Fixed distance
More ultras in United States
- 2nd Endless Summer 6 Hour RunJul 19, 2026 · Annapolis, MD, United States · 6 h
- 7th Big Chief 50K Trail RunJul 19, 2026 · Truckee, CA, United States · 50 km
- 11th Maah Daah Hey 100 Mile Trail RunJul 24 – Jul 26, 2026 · Medora, ND, United States · 171 km
- 12th Never Summer 60kJul 24, 2026 · Gould, CO, United States · 60 km
- 14th Standhope Ultra ChallengeJul 24, 2026 · Ketchum, ID, United States · 60 km