Races
Miwok
Marin Headlands. Miwok hundred k. Eleven thousand feet above the Pacific. May fog or May heat.
- Start69 ft
- High1,830 ft
- Low27 ft
- Finish72 ft
- California at mile 0.0
- Miwok mile 12 at mile 12, cutoff 11.8 hours
- Miwok mile 25 at mile 25, cutoff 23.6 hours
- Miwok mile 37 at mile 37, cutoff 35.4 hours
- Miwok mile 50 at mile 50, cutoff 47.2 hours
- Finish California at mile 62, cutoff 59 hours
Geometrycourse math
The cruxMarin Headlands climbs above the Golden Gate (near mile 40)
Course DNA
The Course
Miwok runs 100 km through California. +18,491 ft gain and -18,488 ft loss. Surfaces skew 90% trail / 10% fire road. Marin Headlands climbs above the Golden Gate. High point near 1,877 ft. Low near 23 ft. May temps run 50°F to 90°F. The course rewards patience early and punishes rushed descents after mile 31.
The Work
Train for 18,491 feet of climbing across 100 km. Back-to-back long runs on trail. Practice power-hiking grades above 15 percent. 15:30:59 hours total means limited margin: rehearse fueling every 45 to 60 minutes and downhill eccentric work weekly. Technicality 5/10. Build a block that simulates the crux near mile 40.
Kit
May in California: plan for 50°F to 90°F. Mandatory shell if rain is in forecast. Headlamp with spare batteries if 15:30:59 hours pushes past dark. Poles help on sustained climbs above mile 16. Vest capacity for 2 liters minimum. Shoes matched to 90% trail: lugs for mud, rock plate if the course turns technical after mile 31.
Race Day
Hold effort through mile 16. The field often splits on the first big climb after mile 31. Marin Headlands climbs above the Golden Gate near mile 40 is where time is won or lost. Walk the steep pinches. Run the flats and gentle downhills. Crew at major aids: socks, calories, ice if hot. Transitions under 5 minutes when possible. Final third is 21 miles of fatigue management. Finish with reserve for the last descent.
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