ISOC Deadwood Snocross Showdown – Professional Snowmobile Races in Deadwood The greatest show on snow returns to Deadwood January 24 & 25, 2025 as the ISOC Amsoil Championship Snocross Series hits the Black Hills for the annual Deadwood Snocross Showdown.   More than 200 of the top professional Snocross racers will descend on the historic town’s Deadwood Event Complex for a weekend of high-flying, high-speed, high-octane snowmobile racing. BUY TICKETS NOW!