March ultramarathons in Alaska, United States

Maintained snowmachine trails near Fairbanks: 55 miles of major climbs, fast descents and blind turns above the valley floor.

Winter routes over Caribou Hills above Kachemak Bay with 50 km and 100 km options for skiing, biking, or running near Homer, Alaska.

Scenic loop course along the Tanana River and through Rosie Creek forest, featuring a frozen landscape and a 45-mile endurance option