Dewey's Pasture Complex Access provides boat ramp access to this 5,390-acre prairie pothole complex in Palo Alto County, a Registered Natural Landmark and Bird Conservation Area featuring marsh and upland prairie habitat.

The site offers multiple parking areas and a 3+ mile mowed loop hiking trail through Lost Island Marsh and along Mud Lake, with additional amenities including restrooms at the nearby Lost Island Nature Center in Huston County Park.

This location is ideal for paddling, fishing, and wildlife viewing in a well-maintained natural area.