Elroy-Sparta State Trail (1967)
Wisconsin opened the Elroy-Sparta State Trail, often called the first rail-trail in the United States. It converted an abandoned railroad corridor into a multi-use path for biking and walking.
The trail drew visitors and showed that linear corridors could be reused for recreation.
It helped launch the Rails-to-Trails movement, which has converted thousands of miles of abandoned rail lines into trails.
The Blue Diamond Wash Trail uses a similar linear-corridor approach, following a wash instead of a rail bed to create a car-free route.
