Introducing our Indiana Dunes tee. Indiana Dunes National Lakeshore hugs 15 miles and 15,000 acres of the southern shore of Lake Michigan and has much to offer. Hikers will enjoy 50 miles of trails over rugged dunes, mysterious wetlands, sunny prairies, meandering rivers and peaceful forests. We are proudly donating 10% of all sales of this one of a kind shirt to The 61st National Park.