The Butler Lake Trail winds more than 3 miles through the 158-acre Butler Lake and Flynns Spring State Natural Area. Butler Lake is a seven-acre spring-fed kettle lake that lies between two prominent eskers. A portion of the loop trail is shared with the Ice Age National Scenic Trail (yellow guideposts) as it follows the 5 to 35 foot ridge of the famous Parnell esker. The Butler Lake Trail is marked by purple guideposts. Glacial interpretive displays are set at the base of the esker and overlook Butler Lake. The rare unicorn clubtail dragonfly is present in the area. A picnic table, grill, and drinking water are located at the trailhead.

Directions: From Plymouth, WI, Take Hwy. 67 to County V or County F to reach Long Lake Recreation Area. Head east from the rec area on Butler Lake Road and proceed 1.5 miles to reach trailhead parking.

The rare unicorn clubtail dragonfly is present in the Butler Lake Trail area.