Treasure Cave

(Photos) Treasure Cave at Wyalusing State Park is a small but storied limestone cave reached by a steep bluff trail and staircase, with a long‑standing local legend of hidden treasure linked to fur traders and soldiers. Accessed via The Bluff Trail.

Location and access

• Treasure Cave is in Wyalusing State Park near the Bluff Trail on the Wisconsin River bluffs, above the confluence with the Mississippi.

• The Wisconsin DNR notes that “a flight of stairs leads to Treasure Cave where the adventurous can explore a small limestone cavern” along the Bluff Trail.

• Hikers typically reach it via the Bluff Trail segment that passes through a distinctive rock “keyhole” or doorway just before the stairs down and then up to the cave entrance.

Cave characteristics

• The cave itself is relatively small and horizontal; one hiker describes it as about 25 feet deep with a noticeable cold airflow from within.

• Inside, there is a low tunnel leading to a small room dug out by visitors, which ends in a dead‑end, though a strong draft from a narrow crack suggests a larger inaccessible cave system beyond.

• The DNR identifies it as a limestone cavern, consistent with the bluffs and other small caves and wet‑weather waterfalls found in the park.

Legends and “treasure” stories

• One popular written version tells of fur traders operating between Prairie du Chien and Green Bay in the early 1800s who, warned of a Sac (Thakiwaki) ambush near Prairie du Chien, retreated up to the mouth of the Wisconsin River.

• According to this story, the crew carried coins, tobacco, and perhaps rum up a perilous cliff, found a sandstone cave on a ledge roughly 200 feet above the water, and stashed their valuables there overnight.

• When they returned days later, a landslide had sealed the entrance with large rocks, and no one knows if anyone ever recovered the cache—giving rise to the “treasure” legend connected to the modern Treasure Cave.

• A second modern retelling ties the cave to the Black Hawk War era: mounted soldiers supposedly hid saddlebags of silver coins in the cave when they feared an attack while traveling between Fort Crawford (Prairie du Chien) and other posts, and the story of the hidden silver was passed down among families.

Trail experience and difficulty

• The hike is short but can be strenuous: there is a steep drop and climb using wooden steps and ladder‑like stairs to access the cave, with some hikers describing it as a “perilous” or at least demanding segment, especially on the return climb.

• Families report that kids notice frogs and other small wildlife along the way, and that the keyhole rock passage and stair system add to the sense of adventure.

• The Bluff Trail itself is wooded, perched high on the bluffs with excellent views over the Wisconsin River valley and nearby overlooks such as Signal Point and Point Lookout.

Seasonal closures and bat protection

• The Wisconsin DNR notes that Treasure Cave at Wyalusing State Park is periodically closed to protect hibernating bats, with a posted closure from October 2024 through April 2026 and reopening in May 2026.

• During these closures, visitors can typically hike to viewpoints near the cave area but are not allowed to enter the cave itself, in line with broader efforts to reduce disturbance and disease risk for bat populations.