The Mountain-Bay State Trail is an 83-mile state-designated rail trail in Brown, Marathon, and Shawano Counties in Wisconsin. The trail is the longest rail trail in the state.[1]
The trail is named for the two geological features at either end of the trail: Green Bay and Rib Mountain.[2]
The trail is free to walk or run, but a trail pass must be purchased in order to bike the trail, which may be purchased at several self-registration stations along the trail.[3]