Bois Blanc Island is coterminous with Bois Blanc Township, Mackinac County in the U.S. state of Michigan. The island covers about 34 sq mi or 88 km² and is about 12 miles (19 km) long, 6 miles (9.6 km) wide and has 6 lakes. Bois Blanc is located in Lake Huron southeast of Mackinac Island and almost due north of the city of Cheboygan. The community of Pointe Aux Pins is on the south side and has ferry service to Cheboygan.

The island sits on latitude 45.766 N and longitude 84.436 W and is the starting point for the rest of the upper peninsula.  Bois Blanc Island is due north 5 miles off the coast of Cheboygan. Its just a short ferry ride away from this metropolitan area. 

If you are planning on visiting the islands natural beauty you can access the ferry schedule on Plaunt Transportations’ website at www.bbiferry.com .  Reservations are required if you are traveling with a vehicle only.

Bois Blanc Island Lighthouse built in 1828