Large natural prairie pothole marsh situated in rolling glacial moraine hills.
From the town of Estherville, take Highway 9 west to the town of Superior. In Superior, turn north on 1st St. 1st St heads out of town and turns to the right briefly before becoming 330th Ave northbound. Take 330th Ave north to the slough.
Large prairie marsh surrounded by grasslands and restored native prairie, with an old oak savanna woodland (understory overgrown with invasive shrubs) on the south side of the marsh. This is actually part of a much larger 1260-acre complex of public lands encompassing Little Swan Lake and some of northern Iowa's most rugged and beautiful glacial topography. Outstanding complex for wetland birds, grassland birds and some forest birds.
This is a public hunting area.