Minnesota Valley NWRMap of Minnesota Valley National Wildlife Refuge's trails. Map of Minnesota Valley National Wildlife Refuge's trails - uploaded as part of another storymap. Minnesota Valley National Wildlife Refuge offers close to 50 miles of trails along the Minnesota River from Bloomington to Henderson. Learn more about the trails and current conditions below. Click here to view an interactive map. Or, download one of the following trail maps to print or save to your device. Visit our units like Black Dog: Open season: Open year round - walking spring to fall, snowshoeing, cross-country skiing and fat tire biking in the winter. This trail is open to cycling. Length: 1.5 miles one way. Location of trail: Louisville Swamp Unit, Jordan. Natural surface. Middle Road passes through areas of marsh, crosses a large stream, and passes the junction with the Mazomani Trail South, then wanders through restored prairie and forest until it meets the State Trail junction heading south. This trail experiences seasonal flooding. Trailhead address: 3801 W 145th St, Shakopee, MN 55379.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/0a36537ac0e045b0b38e506d2c981843_0engU.S. Fish and Wildlife Service Open DataPublicTrails MinnesotaValley NWR [United States]Web servicesUnited StatesLast Modified: 2020-03-04