This tunnel is the largest landmark on the Badger State Trail.
As the darkest tunnel in Wisconsin, it holds the title due to the large curve in it. This prevents one from seeing from end to end.
Surprisingly, it is also considerably shorter than any of the Elroy-Sparta Trail tunnels; yet longer than the Hustler Tunnel, the other notable tunnels on Wisconsin Trails.
On the south portal, a partially concealed date confirms the date of 1887.
The tunnel is best accessed from Tunnel Road. Much of the interior of the tunnel either contains a rough cut of stone, or a brick lining.
Some sections also contain a concrete lining, as well as a reinforced steel lining added after the trail was constructed.
The south portal is a stone construction, while the north is a brick construction. Both are approached by sharp limestone bluffs on either side.
The tunnel here is necessary to go under a large ridge, which is common in the Driftless Area. This explanation is why Wisconsin had nine tunnels at one time.
On top of the tunnel, the land is used for farming. However, a few lucky landowners have houses on top of the ridge as well.
The author has ranked this tunnel as being moderately significant, due to it being one of the newer tunnels in Wisconsin.
The photo above is an overview of the South Portal.