Pontoon Slough Boat Ramp is located on the south side of Highway 25 between Nelson, Wisconsin and Wabasha, Minnesota, serving as a launch point for the Nelson-Trevino Bottoms Canoe Trail, an official USFWS designated national water trail.

This access point is ideal for paddlers exploring the Upper Mississippi River backwaters, with opportunities to paddle to Big Lake where thousands of tundra swans gather in fall and bald eagles are commonly sighted.