Snowbound in the Underdown When: Feb. 9; solo races begin at 10 a.m., team races at 1 p.m. Where: Underdown Recreation Area, Copper Lake Avenue, Gleason Cost to compete: $15 Abominable Fat-Bike Race When: Feb. 16; races begin at noon Where: Bradley Park, Bradley Park Road, Tomahawk Cost to compete: $20 before Feb. 15, $25 the day of the race Sweaty Yeti When: Feb. 23 Where: Levis Mound Trail, Fisher Avenue, Levis Fat Bike Birkie When: March 9; races begin at 8 a.m. Where: Birkie trails, Telemark Resort, 42225 Telemark Road, Cable Cost to compete: $45 for the 45K race, $40 for the 18K race until March 4; $60 for the 45K race, $55 for the 18K race from March 5 to 8