The race is held on the rugged trails at Lake Sonoma, about 10 miles northwest of Healdsburg. The course is 86% single track and 9% dirt roads, with the first 2.4 miles on a paved country road. The race starts at 6:30 a.m. and has a 14-hour time limit.

Upcoming Races

Apr 13 2019
50 Miles
The course is an out-and-back circumnavigation of the Warm Springs Arm of Lake Sonoma. It is 86% single-track trail and 9% dirt fire roads, with the first 2.4 miles on pavement.
10,500 10,500 ft.
Out and Back Course
9 Aid Stations
Very hilly, ~7500-12,500 feet in 50 miles
Mostly groomed trail or dirt roads

Results

Date Distance Total Finishers Top Result Top Result (F)
04/14/18 50 Miles 292 5:51:16 7:13:55
04/15/17 50 Miles 300 6:17:55 7:22:34
04/09/16 50 Miles 304 6:00:52 7:14:45
04/11/15 50 Miles 278 6:09:39 7:08:23
04/12/14 50 Miles 301 6:11:10 7:26:15
04/13/13 50 Miles 266 6:14:55 7:47:42
04/14/12 50 Miles 226 6:17:27 7:52:44
04/02/11 50 Miles Race Cancelled
03/27/10 50 Miles 144 7:08:20 8:26:53
03/28/09 50 Miles 111 7:30:58 8:43:30
04/12/08 50 Miles 75 8:24:31 9:44:13
We try to keep the most accurate information about this race, but changes do happen. Always visit the official race website for the most up to date information.
South Mountain Reservation Mayapple Trail Runs
  • May 11, 2019
  • Millburn, NJ
50 KM 100 KM