Explore Wyoming’s Deepest Cave

With almost 8 miles of surveyed passage with a vertical extent of over 1,400 feet Great Expectations Cave here in Wyoming is the third deepest limestone cave in the United States. It is also the second deepest and second longest cave in Wyoming.

Great Expectations Cave also holds the record for Wyoming's largest cave room which is called The Great Hall. Imagine a cafe room over 2,000 feet long and 100 feet high.

You can find Great Expectations in the Big Horn Mountains, just east of Greybull, Wyoming.

To find the cave follow the creek as it sinks into the cave at the entrance and reappears approximately six miles down the canyon. This is called the "Grim Crawl of Death." Enter if you dare.

The property has an eastern boundary with the Bighorn National Forest and a northern boundary with lands managed by the US Bureau of Land Management. The western and southern boundaries border private land.

There is another way in. The National Spelunking Society offers NSS members access and use of the cave and the surface property for recreation, exploration, science, and surveying. The Great Expectations Preserve Management Committee is responsible for managing the Preserve.