California · Marathon · 50K · 50 Mile
Ruth Anderson Memorial Endurance Run
Ruth Anderson Memorial Endurance Run is a marathon, 50K and 50 Mile event held in San Francisco, California. It was last held on October 10, 2026 and is usually run in October; the next date hasn't been announced yet. About 18 runners take part across all distances.
- Usually held
- October
- Location
- San Francisco, CA
- Field size
- ~18 runners
Race details
- Last held
- October 10, 2026
- Usually held in
- October
- Location
- San Francisco, California
- Distances
- Marathon, 50K, 50 Mile
- Field size
- About 18 runners
- Registration
- runsignup.com
- Official website
- ultrasignup.com
Registration, course & weather
- Registration status
- Registration status as last checked September 28, 2026: open
- Start time
- 7:00 AM PDT
- Course profile — 50K
- Loop course; Mostly road, some trail; USATF certified
- Course profile — 50 Mile
- Loop course; Mostly road, some trail; USATF certified
- Course profile — Marathon
- Loop course; Mostly road, some trail; USATF certified
- Typical race-day weather
- about 62°F at the start, 72% humidity, 2 mph wind (based on the 2023 race day, measured near the city center rather than the exact start line; Open-Meteo, checked September 28, 2026)
About the Ruth Anderson Memorial Endurance Run
The course is a 4.5 mi loop around Lake Merced.
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Guides from the RaceRove blog
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
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- Blog All guides Planning advice for finding, choosing and travelling to races.
Ruth Anderson Memorial Endurance Run: common questions
- When is the Ruth Anderson Memorial Endurance Run?
- The next date hasn't been announced in the listing yet. The race is usually held in October. Check the organiser's website for the official date.
- Where is the Ruth Anderson Memorial Endurance Run held?
- In San Francisco, California.
- What distances does the Ruth Anderson Memorial Endurance Run offer?
- Marathon, 50K and 50 Mile.
- How many people run the Ruth Anderson Memorial Endurance Run?
- About 18 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Ruth Anderson Memorial Endurance Run?
- Registration is handled by the organiser at runsignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Ruth Anderson Memorial Endurance Run?
- Registration status as last checked September 28, 2026: open.
- What time does the Ruth Anderson Memorial Endurance Run start?
- 7:00 AM PDT.
- What is race-day weather usually like at the Ruth Anderson Memorial Endurance Run?
- about 62°F at the start, 72% humidity, 2 mph wind (based on the 2023 race day, measured near the city center rather than the exact start line; Open-Meteo, checked September 28, 2026).
Plan this race in RaceRove
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