Sonoma Fall Classic
Oct 17Healdsburg, CA100 mi, 50 mi +1
Also a marathon, 73 mi from Ruth Anderson Memorial Endurance Run, registration open
Marathon
Ruth Anderson Memorial Endurance Run
San Francisco, California
- Aid stations
- 1
- Days to go
- 4
At a glance
- Date
- Oct 10, 2026
- Location
- San Francisco, California
- Distances
- Marathon
- Elevation gain
- 2,488 ft
- Aid stations
- 1
- Registration
- See ultrasignup.com
- Official site
- run100s.com
- Listed from
- RunSignUp
- Last checked
- Oct 5, 2026
Plan this race for free
1 aid stations are already loaded. Add cutoffs, pacing and the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.
Build my planAbout this race
The course is a 4.5 mi loop around Lake Merced.
Key dates
Race day
Oct 10, 2026
Email me updates about Ruth Anderson Memorial Endurance Run
Registration openings and major changes, like a new date or a cancellation.
Aid stations
1| Station | Distance | Crew | Drop bags | Cutoff | Supplies |
|---|---|---|---|---|---|
Start/Finish aid station One aid station per loop at the start/finish area. Runners also have access to their vehicles and may set up supplies near the aid station. A second water fountain and water dropoff are located about halfway through the loop. | -- | -- | waterelectrolyteswide selection of foods |
Entry transfers
Can't race, or need an entry? Post it here so nobody has to ask if it's still available.
Similar races
Lake Chabot Trail Run
Nov 7Castro Valley, CA50K, Marathon +4
Also a marathon, 23 mi from Ruth Anderson Memorial Endurance Run, registration open
ZombieRunner Halloween
Oct 31San Jose, CAMarathon, Half Marathon +2
Also a marathon, 43 mi from Ruth Anderson Memorial Endurance Run, registration open
Bear Trap Trail Races
Oct 10Tooele, UTMarathon, 23K +1
Also a marathon, the same weekend as Ruth Anderson Memorial Endurance Run, registration open
Straight-line distance
More Marathons in California
All Marathons in CaliforniaBizz Johnson
Oct 11Susanville, CA50K, Marathon +2
Sonoma Fall Classic
Oct 17Healdsburg, CA100 mi, 50 mi +1
The Peak 50K, Marathon & Half Marathon
Oct 17Julian, CA50K, Marathon +1
Trail Run at Sly Park - Fall
Oct 24Pollock Pines, CA50K, Marathon +5
Caspers Trail Races
Oct 31San Juan Capistrano, CA50K, Marathon +3
ZombieRunner Halloween
Oct 31San Jose, CAMarathon, Half Marathon +2
Mount Laguna Trail Marathon
Nov 1Mount Laguna, CAMarathon
Lake Chabot Trail Run
Nov 7Castro Valley, CA50K, Marathon +4
The Saddleback Marathon
Nov 7Silverado, CAMarathon, 25K +2
Griffith Park Trail Marathon
Nov 21Los Angeles, CA50K, Marathon +3
Calero Trail Run - Winter
Dec 5San Jose, CA50K, Marathon +5
Magnolia Magic River Trail Run
Dec 12Pilot Hill, CA50K, Marathon +4
Races Near San Francisco
All races near San FranciscoHunter S. Thompson Fear & Loathing
Dec 6San Francisco, CA50 mi, 50K
Marin Ultra Challenge
Mar 13, 2027Sausalito, CA50 mi, 50K
Pacifica Foothills Trail Run
Jan 23, 2027Pacifica, CA30K, Half Marathon +1
Quad Dipsea
Nov 28Mill Valley, CA28.4 mi
Oakland Tech 5km/1 mile Race/Run/Walk Fundraiser
Nov 1Oakland, CA5K, 1 mi
Mt. Tam Trail Run
Nov 7Stinson Beach, CA50K, 30K +2
Bay Area 100
Jun 12, 2027Berkeley, CA100 mi
Peacock Gap Trail Run
Dec 5San Rafael, CA30K, Half Marathon +1
Oakland Hills Trail Run
Oct 24Oakland, CA35K, Half Marathon +1
Skyline 50k Endurance Run
Aug 1, 2027Castro Valley, CA50K, 21K
The Big Alta
Mar 19, 2027Marinwood, CA50K
Chabot/Redtail Ridge Trail Run
Feb 20, 2027Castro Valley, CA50K, 35K +3
October Races Nearby
All October racesEuchre Bar Massacre
Oct 10Foresthill, CA50 mi, 25 mi
Granite Head Trails and Ales
Oct 10Granite Bay, CA11.45 mi, 6.6 mi
Mountain Tiger Diablo
Oct 10Clayton, CA12 mi
Sunset & Cider Trail Races
Oct 10Auburn, CA50K, 13 mi +1
Champion Mine Trail Race
Oct 11Nevada City, CAHalf Marathon, 10K +1
California Gold Rush Trail Run - Fall
Oct 17Coloma, CAHalf Marathon, 15K +2
Heart of Cool Trail Run
Oct 17Cool, CAHalf Marathon, 10K +1
Quicksilver Trail Challenge
Oct 17San Jose, CAHalf Marathon, 10K
Race planning
Plan Ruth Anderson Memorial Endurance Run with Crewable
Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.
Build my planAre you the race director for Ruth Anderson Memorial Endurance Run?
Claim this race to manage registration, volunteers, and race day.