From Memorial Day weekend to October 31, park Exhibit buildings are open daily from 9:00 a.m. to 4:30 p.m. and the grounds until dusk.

From November through late May, the exhibit buildings are closed, but the park Visitor Center is often open most days Monday - Friday, from 9:00 - 4:15. Park information, brochures and the passport stamp are available there.

For your safety, please be aware that during the winter months, most areas of the park are not maintained for public use. Visitors should take care as many pathways and trails may be snow covered and slippery. Trails are also not regularly patrolled during the off season.