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April 13th, 2024

Lake Sonoma, California

Download file: Lake_Sonoma_50.gpx

About the Course

It’s sneaky hard, so save something for the second half. The hills aren’t major, but they are relentless and take a toll…all while providing beautiful scenery along the way. The course now starts and finishes in the green space next to the Lake Sonoma Visitor Center. This means runners will begin the course with a gradual climb up the road, and end with a speedy downhill finish! Additionally, there are three more major climbs throughout the middle of the course, which many runners choose to hike. If you’re wiped out, the last 12 miles can go on forever, so save some juice for the end and you will pick up a lot of places in the last two or three hours. The course is 98% trail and 2% road. The race starts at 6:30 am and has a 14-hour time limit.

For the top runners, it’s pretty easy to get sucked into a speedy start (even going uphill). Somebody will go out crazy hard, and it’s really difficult to let them go. Try to find a balance between being reckless and not being so conservative that you’re never in the hunt. The second half should be a bit faster than the first half, thanks to the new downhill finish.

50 Mile Race Details

Registration = $250

Entrants after January 15th will not receive a race shirt. Extra shirts will be available at the finish line.

Aid Station Details

Aid Station
Mile
Next Aid
Cut Off
Crew
Drop Bag
South Lake
2.4
4.5
No
No
Island View
6.9
7
No
No
Warm Springs
13.9
4.9
Yes
Yes
Wulfow
18.8
2.9
No
No
Madrone
21.7
4.6
Yes
No
Lone Rock
26.3
4.6
1:15 PM
Yes
Yes
Madrone
30.9
2.9
Yes
No
Wulfow
33.8
4.9
No
No
Warm Springs
38.7
7
4:45 PM
Yes
Yes
Island View
45.7
4.5
7:10 PM
No
No
South Lake
50.2
1.7
No
No
Finish
51.9
8:30 PM

* Runners who do not think they can finish the race should drop at Warm Springs, Madrone, or Lone Rock. Island View and Wulfow aid stations are not easily accessible and do not have staff to assist with shuttling runners back to the start/finish area.

Prize Money

All funds will be issued in US Dollars.

Aid Stations

Aid stations will be stocked with the normal ultra fare, and will have GU Energy Gels, GU Liquid Energy and GU Roctane Energy Drinks. 

Note: South Lake & Wulfow are water only aid stations.

Please monitor your fluid requirements carefully and note that there are fairly long stretches between aid. If it’s warm you will likely need more than one bottle in the afternoon. Every runner must carry at least one water bottle.

Drop Bags will be transported to the Lone Rock aid station and to Warm Springs Creek. Please try to limit the size of your drop bag to no larger than a small shoebox. We are happy to allow for drop bags, but not particularly interested in moving all your worldly possessions.

DNF Drops – We hope you don’t DNF, but if you need to drop from the race, you should drop at Warm Springs, Madrone, or Lone Rock. DO NOT DROP at Island View or Wulfow. These aid stations are not easily accessible and do not have staff to assist with shuttling runners back to the start/finish area.

Crew Driving Directions

From the start to Warm Springs Creek: Return to Stewart Point-Skaggs Springs Road and head up the hill approx.1.75 miles. Turn/continue left on Skaggs Spring road. Follow it for 11.5 miles to the intersection of Old Skaggs Springs Road. Turn right on Old Skaggs Springs Road and follow it for 3 miles to the gate. (Note that this entire 14 miles is on a very scenic country road that twists and turns. If you are prone to car sickness this might possibly be an issue.) Park here and walk a half-mile further down the road to the aid station.

From Warm Springs Creek to Liberty Glen (Madrone Point): Return up Old Skaggs Springs Road for 3 miles to the stop sign. Turn left onto Stewart Point-Skaggs Springs Road and follow it for 11.5 miles to the stop sign at Rockpile Road. Turn left and follow Rockpile Road for 3.2 miles to the Liberty Glen Campground Road. Turn left and follow this for 0.5 miles.

After the entrance station, turn left and follow the road to the Group Campground E. Park here and walk about 200 yards up the service road to the top of the hill where the course comes in. The Madrone Point aid station is another mile down the service road but you can crew your runner from this spot. Allow 45 minutes to drive here from Warm Springs Creek.

Liberty Glen to Lone Rock: Return to your car, and drive back up the hill to Rockpile Road. Turn right and follow Rockpile Road for about a half mile back to the well-signed Lone Rock trailhead parking area on your left. The aid station is located on South side of Rockpile Road. Be careful crossing Rockpile Road to access the aid station.