Sat, Oct 10, 2026

Ruth Anderson Memorial Endurance Run

San Francisco, CA

Registration openAnnual since at least 2023

50K50 Miles4.5 Miles

Finish-Time Stats

Going by the 2025 results, this is a small, friendly field, with a competitive front end and a big recreational middle.

50K · 2025 results

51finishers

3:12:44winner

5:45:34median

10:44:55cutoff

Top 3: Anthony Fagundes (3:12:44) · Jamie Hunyor (3:17:46) · Arvind Rao (3:30:03)

50 Miles · 2025 results

18finishers

7:06:55winner

9:42:36median

12:30:05cutoff

Top 3: Aidan O'Connor (7:06:55) · Kevin Moore (7:10:13) · Paul Broyer (7:23:23)

The Ruth Anderson Memorial Endurance Run has been held every year since at least 2023. That is as far back as RunSignup's records for this race go, so it may well be older.

Where Would You Finish?

Enter a finish time to see where it lands against the most recent 50K results.

Median

See how your time stacks up nationally →

How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Jul 27, 2026.

Free race emails

Get the Weekly RunSesh

In for this one or still deciding, keep race season near San Francisco on your radar: a Monday look ahead and a Thursday rundown of the weekend's races.

Two helpful emails per week. No spam. Unsubscribe anytime.

Distances & Start Times

50K10/10/2026 07:00Free

50 Miles10/10/2026 07:00Free

4.5 Miles10/10/2026 07:00Free

Going for a Time?

Set a goal and get a pace band: every mile split on a card sized for your phone lock screen, so race morning needs no math.

Plan Your Trip

Where to Stay

Traveling for this race? The map shows hotels and rentals in and around San Francisco — pan or zoom to compare what's nearby.

The map is provided by Stay22. If you book through it, RunSesh may earn a commission at no extra cost to you — it never affects the races we list.

Common Questions About the Ruth Anderson Memorial Endurance Run

Will I finish last at the Ruth Anderson Memorial Endurance Run?

Almost certainly not. Half the 50K field finished slower than 5:45:34, and the last recorded finisher came in around 10:44:55, so there is a long tail of runners behind the middle of the pack. Most fields are far slower than people expect.

Is the Ruth Anderson Memorial Endurance Run a good first 50K?

It is a small race (51 finishers), which is friendlier and less intimidating than a big-city event, though the field thins out. There is no qualifying time, and the finish-time spread above shows how varied the field really is. If it is your first 50K, that spread matters more than the winner's time.

How competitive is the Ruth Anderson Memorial Endurance Run?

The 50K winner ran 3:12:44 while the median finisher took 5:45:34. That spread points to a mixed field, with a competitive front and a big recreational middle.

Where can I train for the Ruth Anderson Memorial Endurance Run?

Join a local run club. Golden Gate Running Club, Run Club SF, Slow Runners Club and others in San Francisco welcome runners of all paces, and a weekly group run is the most reliable way to hold a training block together.