Embark on an unforgettable journey into the heart of the Alaskan winter at the legendary Susitna 100, scheduled for February 14, 2026, in Big Lake, Alaska. This iconic event, boasting the title of North America's oldest consecutively-held winter endurance race with origins dating back to 1987, challenges athletes across three distinct divisions: foot, bike, and ski, all tackling a grueling 100-mile course. Known as a true test of endurance, resilience, and self-reliance, the Susitna 100 carves a rugged path through the breathtaking Susitna River Valley.

The course itself is a dynamic, 100-mile loop traversing snow-packed trails, frozen rivers, and expansive swamps, winding through forests on what are primarily marked snowmobile and dog sled trails. While relatively flat, with an approximate elevation gain and loss of 2200 feet over the entire distance, don't let the numbers fool you; conditions are notoriously unpredictable. Racers might encounter anything from hard-packed, fast snow to soft, deep powder, potentially requiring snowshoes. Amidst the challenge, the stunning scenery offers glimpses of majestic mountains, the possibility of witnessing the aurora borealis, and wildlife like moose and fox. Navigation is guided by approximately 1000 distinct "SU 100" lath markers, many equipped with reflective tape for the 13 hours of darkness participants will face. The start and finish are located at Happy Trails Kennels in Big Lake, a working Iditarod dog team kennel.

The Susitna 100 emphasizes self-sufficiency, requiring participants to carry a mandatory kit of survival gear, including a -20F sleeping bag, bivy or tent, and at least 3000 calories of food, all verified at a pre-race gear check. Aid stations, typically three to four along the route, provide vital food, water, and shelter. Typical race day conditions in mid-February hover around highs of 26F and lows of 14F, with a low 5% chance of precipitation, though the Alaskan wilderness always keeps racers on their toes. This race isn't just about speed; it's about tenacity and patience, offering an authentic, raw Alaskan winter experience that has earned its reputation as an epic and unforgettable challenge for those seeking the ultimate cold-weather ultramarathon.