Susitna 100

Big Lake, United States • 13-15 Feb 2027

Susitna 100 and Little Su 50K

Alaska Winter Wilderness Races organizes the Susitna 100M and Little Su 50K human-powered winter races held in February. The events use marked trails in remote, frozen areas near Big Lake, Alaska, and take place across terrain with varied winter conditions and views.

Distances include:

  • 100 miles on marked winter trails
  • 50 km on marked winter trails

The organizer provides course maps, race rules, gear information, and race results. There is an organized gear check and meeting, and additional resources cover course descriptions, travel information, standings, and a photo gallery.

The event acknowledges that it takes place on the traditional lands of the Dena’ina and Ahtna Dene people. Portions of the land are owned by the Mental Health Trust Authority and are used under permit; revenue from permits supports AMHTA.

Information on race procedure, mandatory gear, and course specifics is published by the organizer. The races are described as human-powered and run on marked routes through winter conditions in Alaska. Visit the organization's website for the most recent information.

Race information

100 mi
Susitna 100
50 km
Little Su 50k
Visit the organization's website for the most recent information.
Trail runs nearby

Run De Tour is a two part trail run at Kincaid Park and the Hillside Trails that uses sections of the Double Bubble and Spencer Trails. Multiple distances are offered and registration is non refundable with bib pickup on race day.

Backyard ultra at Government Peak Recreation Area near Hatcher Pass in Palmer AK. Runners repeat 4.167 mile loops on single track and ski trails until one finishes; the field is limited to 75 entrants and basic aid is provided at the start..

An inaugural 5K on July 11, 2026 at Skeetawk Ski Area in the Hatcher Pass area, co-hosted by regional organizations; registration fees support local youth running teams and registrants receive a 20% Hatcher Romp ticket discount.

Mud Factor Anchorage is a 5K mud and obstacle run at Kincaid Park on July 19 2026. A signed liability waiver and photo ID for adults are required and spectators pay a cash fee for festival area access.

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