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DISTANCE
26.2 Miles
ELEVATION GAIN
5,122 Feet
CUT OFF
10 Hours
START TIME
8:00am
It’s not worth it unless you have to work for it! The marathon start is located in the green space next to the Lake Sonoma Visitor Center (you can’t miss it). The first mile climbs a steep trail and will test your legs, as this is your biggest climb of the day. The course will then continue onto beautiful rolling single track trails. You will continue past South Lake, Island View, Warm Springs Creek, Wulfow, and the new Bummer aid station, finally crossing the scenic lake bridge. Remember to save some juice for the last few miles, as you have a screaming downhill towards the finish. The race starts at 8:00am.
Skratch Labs lemon lime drink mix and orange and grape chews will be provided on course.
Prize Money
1ST PLACE
$750
2ND PLACE
$500
3RD PLACE
$250
Elite Entrants List
Aid Station | Mile | Next Aid | Cut Off |
|---|---|---|---|
South Lake | 1.5 | 4.5 | |
Island View | 6 | 7 | |
Warm Springs | 13 | 4.9 | 1:00pm (5 hours) |
Wulfow | 17.9 | 5.1 | |
Bummer | 23 | 3.2 | |
Finish | 26.2 | 6:00 PM |
Runners who do not think they can finish the race should drop at Warm Springs. Island View, Wulfow, and Bummer aid stations are not easily accessible and do not have staff to assist with shuttling runners back to the start/finish area.
There will be five on course aid stations for the marathon course. South Lake Trailhead and Wulflow will be water only aid stations. Island View aid station will have water, Skratch Labs products, and other general race foods. Warm Springs and Bummer aid stations will be stocked with the normal race fare, and will have Skratch Labs Chews and Hydration. WE ARE A CUPLESS RACE!
Please monitor your fluid requirements carefully and note that there are fairly long stretches between aid stations. If it’s warm you will likely need more than one bottle in the afternoon. Every runner must carry at least one water bottle.
DNF Drops – We hope you don’t DNF, but if you need to drop from the race, you should drop at Warm Springs. DO NOT DROP at Island View, Wulfow, or Bummer. These aid stations are not easily accessible and do not have staff to assist with shuttling runners back to the start/finish ar
Lake Sonoma 50, Marathon and Trail Sisters Half Marathon are owned and operated by Trail Sisters LLC. All Rights Reserved © 2025
