The UP Health System Great Bear Chase Ski Marathon has something for everyone and enough snow to go around, even in March! Skiers can choose from the 50k Skiathlon (limited to the first 100 entries), our signature freestyle and classic 50k races, or freestyle or classic 25k or 10k distances. The Great Bear Chase has earned a reputation as a skier-oriented weekend that allows skiers of all experience levels to finish their season with a high quality event. All events are chip timed, and compete on beautiful power tilled trails.