North of Green Bay, the gentle 30 mile Ahnapee State Trail runs from Casco to Algoma to Sturgeon Bay along an old railgrade that is open to snowmobiling. This ungroomed trail passes pass through the Ahnapee Wildlife Refuge and Forestville Millpond. Bedrock outcrops of the Niagara Escarpment can be found throughout the state park. The trails is part of the 1,000-mile Ice Age Trail.
To reach the snowmobilng trailhead for the Ahnapee State Trail from Green Bay, head north on SR43 and then north on SR57 to Sturgeon Bay. About a half mile past County Highway S, turn south on Shiloh Road for 1.5 miles to parking lot.
While snowmobiling Ahnapee State Trail, the state of Wisconsin requires that all snowmobiles display a Wisconsin snowmobile registration decal. For non-residents, if the snowmobile is registered in another state, then they can purchase a non-resident snowmobilie trail pass.
Overall, Ahnapee State Trail is the 7th most popular snowmobile trail of all 29 snowmobiling rides in Wisconsin.