Rainbow Falls Provincial Park, Provincial park in Thunder Bay District, Canada

Rainbow Falls Provincial Park is a 575-hectare recreation-class park in two separate parts: the Whitesand Lake campground on Whitesand Lake, with trails to the falls on the Hewitson River, and the Rossport Campground on the rocky shore of Lake Superior. Both lie just off Highway 17 between Rossport and Schreiber.

Rainbow Falls Provincial Park is a recreation-class park in the Ontario Parks system, split into the Whitesand Lake campground and the historic Rossport Campground east of Rossport. In August 2007, 20-year-old camper Christina Calayca disappeared while jogging in the park. Searches in August 2007 and through October 2009 failed to locate her, and the case remains unsolved as of 2022.

The park integrates sections of the 52-kilometer Casque Isles Trail, offering visitors opportunities to explore regional geological formations and natural landscapes.

The park is best explored on foot, with marked trails offering different difficulty levels. Visitor numbers vary by season, with warmer months attracting more people.

The Rainbow Falls Trail extends 1.1 kilometers with dedicated platforms and stairs, leading to elevated viewpoints overlooking Lake Superior.