Horseshoe Bay Cave

Horseshoe Bay Cave is one of Wisconsin’s most unusual natural attractions, a wild cave beneath the Niagara Escarpment near Egg Harbor in Door County. Also known by historic names including Tecumseh Cave, Alpine Cave and Door County Cave, it has more than 3,100 feet of mapped passages, making it one of the longest known natural caves in Wisconsin. The cave was formed by underground water moving through the peninsula’s Silurian dolomite, and its history stretches back at least to the late 19th century. Local lore has also connected the cave to Chief Tecumseh, although that story is part of the cave’s folklore rather than established history.

Unlike Wisconsin’s commercial show caves, Horseshoe Bay Cave is not a polished attraction with paved walkways and electric lighting. Its narrow entrance leads into a cold, wet, muddy underground environment where authorized public tours require visitors to crawl on their hands and knees through passages only about 3 to 4 feet high. Door County’s guided tours are limited, typically covering about 400 feet of the cave and lasting roughly 45 minutes, with helmets, lights, knee pads, gloves and rubber boots provided. The entrance is located in the field across from Frank E. Murphy Park at 7119 Bay Shore Drive in the Town of Egg Harbor.

Horseshoe Bay Cave is also an important ecological site: the cave is recognized as a significant bat hibernaculum, and general access is closed from October 1 through May 15 to protect hibernating bats. Outside that period, entering the cave requires authorization from Door County Parks, with limited public tours offered on designated summer dates. Visitors can see the gated cave entrance without entering, but anyone hoping to crawl through the underground passages should watch Door County Parks for the annual public tour announcement.