Did you know the Indiana Dunes is actually made up of two parks? There is the Indiana Dunes National Lakeshore and the Indiana Dunes State Park which is nestled inside of the National Lakeshore. Both parks together equal only about 15,000 acres of land, 2,182 of which belongs to the Indiana Dunes State Park. On this page you'll find some general info about both of these parks.
A small stream flows through the Climax forest in the Indiana Dunes State Park

Indiana Dunes National Lakeshore


Website:
http://www.nps.gov/indu/

Location of Headquarters:
Indiana Dunes National Lakeshore
1100 North Mineral Springs Road
Porter, Indiana 46304

Telephone:
(219) 926-7561 (voice/TDD/fax)

Hours

Headquarters:
8:00AM to 4:30PM, Monday Through Friday

Dorothy Buell Memorial Visitors Center
8:00AM to 6:00PM Memorial Day to Labor Day
8:00AM to 5:00PM Labor Day to Memorial Day
Closed Thanks Giving, Christmas, and New Year's Day

Bailly/Chellburg Visitors Center
10:00AM to 4:30PM
Daily from Memorial Day to Labor Day
Weekends only from Labor Day through October

West Beach Bath House
9:00AM to 9:00PM During summer only


Indiana Dunes State Park


Website:
http://www.state.in.us/dnr/parklake/parks/indianadunes.html

At that site you will find more information about the park and information on camping grounds and reservations.