The park is open daily from May 24, 2008 to October 31, 2008. Exhibit buildings  are open 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 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.