Lake Sonoma 100K
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Latest Updates

Due to COVID-19 this race is being put on pause until 2021.

If you are looking for a safe, fun (and legal) way to get back on the trails together, visit the Running is Not Closed trail series.
Stay safe and healthy my trail friends!

Course Map & Turn-By-Turn Details

Cut-offs

  1. Island View- Mile 6.7 - Water only
  2. Warm Springs - Mile 14.0 - Full aid, drop bags, and crew access
  3. Wulfow - MIle 19.4 - Water and ice only
  4. Madrone - Mile 22.1 - Full aid and crew access
  5. Lone Rock - Mile 28.1 - Full aid, drop bags, and crew access - Cut off is 12:30pm
  6. Lone Rock Return - Mile 35.2 - Full aid, drop bags, and crew access - Cut off is 2:30pm
  7. Little Flat - Mile 37.7 - Water, Ice, Electrolyte, and Gels only
  8. Madrone - Mile 42.7 - Full aid and crew access - Cut off is 5pm
  9. Wulfow- Mile 45.4 - Water and ice only
  10. Warm Springs - Mile 50.8 - Full aid, drop bags, and crew access - Cut off is 7:15pm
  11. Island View - Mile 58.1 - Water Only

Course Profile & Aid Stations

#1. 4.3 Island View - Water only

#2. 11.6 Warm Springs - Drop Bags - No Cut-off first time through

#3. 16.1 Wulfow - Water and Ice Only

#4. 17.8 Madrone

#5. 24 Lone Rock - Drop Bags 

#6. Lone Rock return - Drop Bags

#7. 33.4 Little Flat - Water Only 

#8. 40.7 Madrone - Drop Bags 

#9. 42.5 Wulfow  - Water and Ice Only

#10. 47.3 Warm Springs - Drop Bags 

#11. 54.2 Island View - Water Only

Crew Rules

Not available.

Crew Access Aid Stations

Other races in this series

No other races in this series.

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