The best walks and hikes in Minnesota Valley National Wildlife Refuge

The smaller end of rapids Lake has its own name much closer to the parking lot

big open lake easy to get to in the winter

The oak savanna at Louisville Swamp is one of Minnesota's rarest and most distinctive wildlife habitats, defined by a blend of prairie grasses, wildflowers, and widely spaced Bur Oak trees. This transitional ecosystem supports a remarkable diversity of plant species and provides critical resources for endangered wildlife, including the Red-headed Woodpecker and various bats, birds, and insects. As a fire-dependent system, its integrity is maintained through regular burns and ongoing restoration efforts by refuge staff to prevent encroachment by non-native species and maintain its open character. Alongside the savanna, the Louisville Swamp Unit preserves significant remnants of native tallgrass prairie—once expansive across Minnesota. These prairies boast towering grasses and vivid wildflowers, creating a vibrant environment throughout the summer. Specialized communities like the Dry Sand–Gravel Prairie feature grasses such as big bluestem and Indiangrass. At the same time, the dense grassland structure provides crucial nesting habitat for wildlife, including various waterfowl and ring-necked pheasants.

Sand Creek, a 36.6-mile-long tributary of the Minnesota River, winds its way through Le Sueur and Scott counties before meeting the river about a quarter mile downstream from this bridge and just north of Jordan. The creek earned its name from the prominent white sandstone rock formations nearby. Before merging with the Minnesota River, Sand Creek passes through the Louisville Swamp Unit, playing a crucial role in the area's hydrology by influencing how water moves through the swamp. The surrounding landscape is a classic floodplain that floods approximately three out of every five years, which is vital to maintaining the region's unique ecological balance. To help manage this, a water control structure was built to regulate the outflow of water into Sand Creek, but it was washed away by flooding sometime between 2011 and 2014.

According to my USGS topographic map, the waterway this bridge crosses is a narrow backwater bay of Louisville Swamp.

This bridge over Sand Creek in Louisville Swamp has experienced a rather intermittent existence during our visits. When Martha and I first used a GPS to track a hike in Louisville Swamp in April 2010, there was no bridge to cross. On our following outing, however, in November 2011, a bridge had been constructed, only to disappear again by March 2014. Several hikes later, by December 2018, the bridge had reappeared, and as of our last visit in December 2023, it remained open and accessible.

This bridge got washed away once during high water, they have really built it back up nice now.

There are 2 campsites here for either boat use or trail users.