Acadia National Park is open all year. Information is available at park headquarters all year and at Hulls Cove Visitor Center from April 15 through October.

Most facilities—including the visitor center, museums, picnic areas, Seawall Campground, and many roads—close during the winter. Most of the Park Loop Road, including the road to Cadillac Mountain, is closed from December 1 through April 14 and at other times when severe weather creates dangerous conditions.

Please see the list below for operating hours and seasons of park facilities. Detailed information about seasonal closures and road closures is available.

VISITOR CENTERS

Hulls Cove Visitor Center - Open April 15 to October 31
Closed November 1 through April 14
April 15 - June 30 - 8 a.m. - 4:30 p.m.
July & August - 8 a.m. - 6 p.m.
September - 8 a.m. - 5 p.m.
October - 8 a.m. -  4:30 p.m.

Park Headquarters / Winter Visitor Center - Open all year
Closed Thanksgiving Day, December 24 and 25, and January 1
November 1 - April 14 - 8 a.m. - 4:30 p.m., 7 days/week
April 15 - October 31 - 8 a.m. - 4:30 p.m., M-F

Thompson Island Information Center - Open mid-May to mid-October
Hours vary

MUSEUMS

Islesford Historical Museum - Open late June through September
Closed October 1 through late June
9 a.m. - noon, 12:30 - 3:30 p.m.
Open at 10:45 am on Sundays

Sieur de Monts Nature Center - Open May to early October
Closed early October (on or after Columbus Day) through April
May - hours vary, open weekends only
June - 9 a.m. - 5 p.m.
July & August - 9 a.m. - 5 p.m.
September - early October - 9 a.m. - 4 p.m.