Provincial Road 366 (PR 366) is a 219-kilometre-long (136 mi) north-south provincial road in the Parkland Region and Swan River Valley of the Canadian province of Manitoba.

It serves as the main north-south thoroughfare through Duck Mountain Provincial Park, as well as providing a connection between Inglis and Grandview on its southern end, while also connecting Minitonas and Bonsman on its northern end.

[1] Provincial Road 366 starts in the Swan River Valley region of Manitoba, serving Bowsman and Minitonas, crosses the Duck Mountains, and then goes through west-central Manitoba from Grandview to Inglis.

PR 366 serves as the main north-south route through Duck Mountain Provincial Park.

It is mainly a gravel route, but there are short paved sections in Bowsman and Inglis, and longer paved stretches leading up to the Duck Mountains from both Minitonas and Grandview.