There are four camping areas located within the interior of the park (Sanctuary River, Teklanika River, Igloo Creek, and Wonder Lake). Camper buses provide transportation to these campgrounds, but only passengers camping in the park can use these particular buses. At mile marker 53 on road is the Toklat River Contact Station. All shuttle and tour buses make a stop at Toklat River. The contact station features rest rooms, visitor information, and a small bookstore. Eielson Visitor Center is located four hours into the park on the road (at mile marker 66). It features restrooms, daily ranger-led programs during the summer, and on clear days, views of Denali and the Alaska Range. Wonder Lake and Kantishna are a six-hour bus ride from the Visitors Center. During the winter, only the portion of the Denali Park Road near the Visitors Center remains open.