This is the Blue Loop at the Southern Kettle Moraine State Forest - John Muir Trailhead.
A fast rolling cross country trail system, best bike is probably a 29er hardtail or short travel full suspension (lots of single speed bikes too). Small to medium climbs. Trail surface varies from rocky/roots to smooth flowing fast sections. Couple sections with loose sand (The Beach) where you come through a section of pine trees.
This is a state park, so you'll need a state sticker and trail pass to mountain bike
Local Trail Association
|1|| Blue Loop
More Stats for Blue Loop Full mountain bike route
Altitude min860 ft
Altitude start967 ft
Altitude end973 ft
Distance climb5 miles
Distance down5 miles
Distance flat1 miles