Known as the Indianapolis 500 of Snowmobile Racing, the Derby attracts more than 40,000 spectators annually. Fans travel from all over the United States, Canada and beyond to watch more than 500 international drivers race their high-tech snowmobiles at speeds in excess of 100 miles per hour on a solid ice oval. For over 50 years, the race has been held on a fully-contained, half-mile banked oval track located in the heart of one of Wisconsin’s most popular resort areas, Eagle River.