The trail system is built on kettle moraine topography, created by glaciers receding during the Wisconsin Glaciation period.
The Red Loop is widely considered one of the most challenging mountain biking segments in the Southern Kettle Moraine due to its significant elevation changes.
The site acts as a major intersection point for the cross-country mountain bike trail system managed by the Wisconsin DNR.
The trails pass through diverse ecosystems, including hardwood forests and remnant prairies shaped by glacial activity.
The location is part of a larger network of trails that are maintained through partnerships between the DNR and local volunteer cycling groups.
The Emma Carlin Trail Head serves as a primary access point for the Kettle Moraine State Forest–Southern Unit, renowned for its diverse glacial terrain. It features three interconnected loops—the Green, Blue, and Red trails—that progressively increase in distance and technical difficulty. The terrain is characterized by steep, hilly moraines and dense forest cover, making it a hub for mountain bikers and hikers alike. The trail system provides approximately 35 miles of single-track mountain bike trails. It is part of the broader Ice Age National Scenic Trail corridor, offering connections to rugged backcountry segments. Facilities at the trailhead include a shelter, vault toilets, and expansive parking areas suitable for horse trailers and mountain bike rigs.
The elevated ridgeline view on the Red Loop looking over the kettle-and-kame landscape.
Download offline maps before arrival, as mobile service is spotty within the deep moraine valleys.
Mountain bikers should yield to hikers, and all users should remain on marked trails to prevent erosion of the fragile glacial soil.
Check the official DNR trail status page before departing, as trails are frequently closed immediately following heavy rain to protect the tread.
Attempting the Red Loop if you are a beginner cyclist, as it features sustained climbs and technical descents.
Trails are subject to temporary closure during wet conditions or spring thaw to prevent trail damage; check DNR status updates.
Mountain bikers must wear helmets; pack out all trash; stay on marked trails; follow 'Leave No Trace' principles.
