Access point to a 5,390-acre prairie pothole complex designated as a National Natural Landmark and Iowa Bird Conservation Area, located off Highway B17 about 4 miles north of Highway 18 between Spencer and Ruthven.

The site offers a 3+ mile mowed loop hiking trail through Lost Island Marsh and Mud Lake, plus a one-mile forest loop trail accessible from the Lost Island Nature Center parking area in Huston County Park, with restrooms and facilities available.

Kayaking, canoeing, fishing, and camping are permitted in designated areas.