The traditional Badger Mountain Skyline route that goes up and over the summit of Badger Mountain and back on a single track trail.
The first 2 miles up are a nice gradual climb and then you're on flat to very gentle rolling hills for about 0.5 mile. You then go down the back side of Badger for 1.5 miles, which is the steeper side. Once you get to the gravel road and parking lot you turn around and take the same path back.
More information on the WTA website: https://www.wta.org/go-hiking/hikes/badger-mountain-skyline-trail