Facilities at Longmire are open daily year-round. Facilities at Sunrise are open July to early-October. In winter, access is by the Nisqually Entrance in the southwest corner of the park only. The Jackson Visitor Center at Paradise is open weekends and holidays in winter.
Most visitors come on sunny summer weekends and holidays.
Try to schedule your visit mid-week in summer, if possible, since parking is limited in many areas of the park. Rental cars are available at airports. Limited winter access is available via Hwy. 123 in the SE corner of the park. Summer access is available via Hwy.