In winter, a variety of sports are enjoyed by the locals which also draw visitors to Northern Michigan. Snowmobiling, also called sledding, is popular, and with hundreds of miles of interconnected groomed trails cross the region. Ice fishing is also popular. Tip-up Town on Houghton Lake is a major ice-fishing, snowmobiling and winter sports festival, and is unique in that it is a village that assembles out on the frozen lake surface. Higgins Lake also offers good ice fishing and has many snowmobiling, cross country skiing, and snowshoeing trails at the North Higgins Lake State Park. Grayling and Gaylord and their environs are recognized for Nordic skiing. Cadillac is reputed to be even more popular during the winter than it is in the summer.