Prepare for an unforgettable Alaskan winter adventure at the Little Su 50K on February 15, 2026, held in Big Lake, AK. This human-powered race offers a unique challenge across 50 kilometers of marked trails, inviting runners, bikers, and skiers to conquer the remote frozen wilderness. Typical race day conditions in mid-February include highs around 27F and lows around 14F, with a low 5% chance of precipitation, setting the stage for a truly authentic winter experience.

The Little Su 50K course is a demanding loop traversing frozen rivers, expansive swamps, and tight, twisting trails that wind through the Alaskan woods. Athletes will navigate varied terrain, including sections well-packed by snow machines and dog sleds, as well as areas with softer, more challenging conditions and potential overflow. Runners frequently encounter awe-inspiring scenery, with opportunities to spot moose, fox, active dogsled teams, and majestic mountain vistas along their journey. The race starts and finishes at Happy Trails Kennels, a working Iditarod dog team kennel, adding to the unique Alaskan atmosphere.

As a sister race to the longer Susitna 100, the Little Su 50K shares parts of its historic course, including sections of the famous Iditarod Trail, offering participants a taste of legendary Alaskan routes. Aid is available at a halfway water stop and checkpoint in the vicinity of Gunmetal Lake, with additional limited aid at approximately mile 12 and 19. While water is provided at the main checkpoint, racers are responsible for their own food and are encouraged to carry insulated water containers and a light source. This event is renowned for its challenging conditions and the camaraderie among racers and friendly volunteers, making it an appealing adventure for those seeking a remarkable winter ultra experience.