The Mascoutin Valley Trail is 5.3 miles and runs through the southwest corner of Winnebago County and continues on into both Green Lake and Fond du Lac Counties. The trail base is crushed limestone. Horseback riding (approximately May to October), hiking and bicycling, take place seasonally while during winter months it is part of the countywide snowmobile trail system. The Rush Lake Marsh area offers wildlife viewing opportunities. Formerly Known as Rush Lake Trail or the Ripon to Berlin Trail.
One trailhead is located at the junction of Locust Road and Old C&NW Line northeast of Ripon in Fond du Lac County. The trail passes through the Eldorado Marsh and west of the Rush Lake Marsh. It continues north into Winnebago County and west into Green Lake County then ends in Berlin.
Parking is available at the junction of Locust Road and Old C&NW Line northeast of Ripon and by Rush Lake Loop Road off of Hwy E by Rush Lake.