The park is open year-round, 24 hours a day. But many of the park's roads, trails, and facilities are closed seasonally due to snow. Visit our current conditions page to find out what's open in the park today. Crater Lake is one of the snowiest inhabited places in the USA. Each winter, deep snow forces us to close the park's Rim Drive and North Entrance to cars. Rim Drive becomes a trail for skiing and snowshoeing. The North Entrance road becomes a snowmobile trail. These roads close for the season with the first big October snowstorm, or on November 1, whichever comes first.