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Race guide · California, USA
How to train for the Miwok 100K
62 miles through the Marin Headlands, from redwoods to exposed ridges and coastal cliffs, with over 11,000 ft of climbing. Here's what to know and how to get ready.
Next race Sat May 1, 2027
| Distance | Climb | Time limit | Start | |
|---|---|---|---|---|
| 100K | 62 mi | 11,000+ ft | 15:30 | Sat 5:00 AM |
Starts and finishes in Stinson Beach. The field is limited to 400 runners; registration opens November 7, 2026 at 6 AM PT and usually sells out quickly. A Western States 2028 qualifier.
What makes it hard
Steep climbs, early and often
Over 11,000 ft of gain in the Marin Headlands means steep climbs again and again, from redwood forest up to the ridges.
Train for it: Weekly hill sessions and long runs with sustained climbing, plus power hiking on the steepest grades.
Exposed ridges, fast-changing weather
Long stretches run along exposed ridge lines and coastal cliffs, and the weather can change fast.
Train for it: Train in wind and fog when you can, and practise adding and removing layers on the move.
A 15:30 time limit
62 miles with over 11,000 ft of climbing has to fit inside 15 hours 30 minutes, with intermediate cutoffs on the way.
Train for it: Know the cutoffs, keep the early pace honest and rehearse a quick aid-station routine.
How long to train
Plan on 16–20 weeks if you've already run a 50K or 50-miler, and longer if this is your first 100K. Climbing durability matters more than flat speed here.
Get a plan built around race day
Set Miwok as your goal race and VertPro builds your training back from the start line, then adapts week to week. A Vert.run coach reviews your plan in the first 24 hours.
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How much elevation gain is the Miwok 100K?
Over 11,000 ft across 62 miles in the Marin Headlands, according to the organiser.
When is the Miwok 100K 2027?
Saturday, May 1, 2027, starting at 5 AM in Stinson Beach, according to the organiser. Registration opens November 7, 2026 and the field is limited to 400 runners.
Race facts checked October 22, 2026 against miwok100k.com. Confirm dates and rules with the organiser. Vert.run is not affiliated with the race.