Name: Miwok 100K
Start: 2027-01-11
End: 2027-05-01
Location: Stinson Beach

About the Event

The Miwok 100K is one of the most beautiful and iconic trail ultramarathons in the world. We believe everyone deserves a shot at something extraordinary. The Miwok100K is about the everyday runner who shows up ready to dig deep on some of the most breathtaking trails around. Set in the Marin Headlands just north of San Francisco, The Miwok 100K offers 62 miles of gorgeous trails, over 11,000 feet of gain, and nonstop views, from redwoods to ridge lines to crashing coastal cliffs.

The course features single-track trails and dirt roads with about a mile of paved road. The race is competitive at the front, and a rewarding challenge for all. Less than an hour from San Francisco, the Start/Finish is in the town of beautiful Stinson Beach, nestled against Mount Tamalpais, with its excellent cafés, a small market, lodging, and more.

Course marking is excellent, and you’ll be supported by some of the best volunteers on a race course anywhere. We hire professional medical for all aid stations for those occasional skinned knees and such. Our 2026 runners will receive a custom Miwok 100K finisher’s medal and a Miwok 100K sweatshirt.

We have 3 options for you to participate in our event:

1. Miwok 100K on May 2, 2026 (When the race is full, you will be placed on a Waitlist. Your card will not be charged until you are offered a spot, and accept it. Registered runners who drop prior to February 1 will receive a $124 (40%) refund.

2. Miwok 100K on May 2, 2026, PLUS a 16 week training plan from coach & Race Director Magda Boulet

3. Miwok 100K Team Relay on May 2, 2026 (must have 4 participants per relay)

Please make sure you sign up for the correct event!

Races Offered

16-week Training Plan

Jan 11, 2027

straighten

Distance — 100K

terrain

Type — Running

timer

05:00

sell

$150.00

Miwok 100K

May 01, 2027

straighten

Distance — 100K

terrain

Type — Running

timer

05:00

sell

$310.00

Miwok 100K Team Relay - Teams of 4 runners

May 01, 2027

straighten

Distance — 100K

terrain

Type — Running

timer

05:00

sell

$400.00

Miwok 100k PLUS 16 week Training Plan

May 01, 2027

straighten

Distance — 100K

terrain

Type — Running

timer

05:00

sell

$460.00

Weather History

These values represent the 3-year monthly averages for January in Stinson Beach.

thermostat Temperature

3.6° / 11.6°

wb_sunny Feels like

1.1° / 9.6°

light_mode Avg sunshine hours

4h 50m

water_drop Avg rainfall

8.1 mm

ac_unit Avg snowfall

0.4 cm

air Avg wind speed

6.4 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Low (2.0)

humidity_mid Humidity

89.2%

wb_twilight Sunrise

08:07

nightlight Sunset

17:45

About Stinson Beach

Learn more about the host city, Stinson Beach.

Springfield is a city in Lane County, Oregon, United States. Located in the Southern Willamette Valley, it is within the Eugene-Springfield metropolitan statistical area. Separated from Eugene to the west, mainly by Interstate 5, Springfield is the second-most populous city in the metropolitan area after Eugene. As of the 2020 census, the city has a total population of 61,851, making it the ninth-most populous city in Oregon.