Available distances
About
Sonoma Coast Trail Runs takes place on May 29, 2027, in Duncans Mills, Sonoma County, California. The 50K (31.1 mi) starts at 8:00 a.m., the trail marathon (26.2 mi) at 9:00 a.m., the 30K (18.6 mi) at 10:00 a.m. and the half marathon (13.1 mi) at 11:00 a.m., on courses alternating hills, forest and views of the Pacific.
The staggered starts are designed so that everyone finishes around the same time, which means the half marathon is run in the middle of the day — the warmest and least sheltered part of it. If you are on the later start, treat it as a warm-weather race even though the ultra runners left in the cool, and carry water rather than relying on the aid stations alone.
Highlights
- Mountain
- Off-road
- Forest
- High altitude
Prepare for Sonoma Coast Trail Runs with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
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- Target paces, long runs, key sessions: everything is calculated for race day
Races nearby
Other upcoming races around Duncans Mills.
IPA10K Brewfest & Beer Mile
Oct 31, 2026 · Sebastopol, CA · 13 mi away
13.1 mi · 6.2 mi · 1.9 mi
Lake Sonoma 50 Mile
Apr 10, 2027 · Healdsburg, CA · 15 mi away
50.3 mi · 26.1 mi · 13 mi
Lake Sonoma 100K, 50K & Trail Sisters Half
Apr 10, 2027 · Geyserville, CA · 19 mi away
62.1 mi · 31.1 mi · 13.1 mi
Annadel Half Marathon
Apr 17, 2027 · Santa Rosa, CA · 19 mi away
3.1 mi · 6.2 mi · 13.1 mi
Napa Valley Marathon
Feb 28, 2027 · Calistoga, CA · 27 mi away
26.2 mi · 13.1 mi · 3.1 mi
Napa Valley Endurance Run
Apr 11, 2027 · Calistoga, CA · 27 mi away
31.1 mi · 21 mi · 13.4 mi · 6.2 mi