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. 4.3 Island View - Water only
  2. 11.6 Warm Springs - Crews and Drop Bags - No Cut-off first time through
  3. 16.1 Wulfow - Water and Ice Only
  4. 17.8 Madrone - No Cut-off first time through - Crews allowed
  5. 24 Lone Rock - Crews and Drop bags - Cut-off is 11:30am 1st time through
  6. 31.1 Lone Rock return - Crews and Drop Bags - Cut-off is 1:45pm 2nd time through
  7. 33.4 Little Flat - Water Only 
  8. 40.7 Madrone - Crews - Cut-off is 4:45pm 2nd time through
  9. 42.5 Wulfow  - Water and Ice Only
  10. 47.3 Warm Springs - Crews and Drop Bags - Cut-off is 6:45pm
  11. 54.2 Island View - Water Only

Course Profile & Aid Stations

#1. 4.3 Island View - Water only

#2. 11.6 Warm Springs - Drop Bags 

#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

Cut-Offs & Aid Stations

  1. 4.3 Island View - Water only
  2. 11.6 Warm Springs - Crews and Drop Bags - No Cut-off first time through
  3. 16.1 Wulfow - Water and Ice Only
  4. 17.8 Madrone - No Cut-off first time through - Crews allowed
  5. 24 Lone Rock - Crews and Drop bags - Cut-off is 11:30am 1st time through
  6. 31.1 Lone Rock return - Crews and Drop Bags - Cut-off is 1:45pm 2nd time through
  7. 33.4 Little Flat - Water Only 
  8. 40.7 Madrone - Crews - Cut-off is 4:45pm 2nd time through
  9. 42.5 Wulfow  - Water and Ice Only
  10. 47.3 Warm Springs - Crews and Drop Bags - Cut-off is 6:45pm
  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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