The Yukon Arctic Ultra - Teslin is a 600 km ultra-endurance race in the Yukon, held in February under the Montane Yukon Arctic Ultra name. The route involves approximately 6,000 meters of elevation gain, presenting a significant challenge that combines distance, winter conditions, and repeated elevation changes.
The event is described as the coldest and toughest ultra globally, noted as one of the most demanding ultra-endurance races. The Teslin race offers a long, remote Yukon course, distinct from city-based ultramarathons, with challenges stemming from isolation, cold temperatures, and the course's extensive length.