Idaho’s Mammoth Cave is located eight miles north of Shoshone, Idaho, on the scenic State Highway 75. Starting May 2nd, 2025, summer hours are 10 a.m. to 6 p.m., 7 days a week, including all major holidays. After Labor Day (September 2nd), we will switch to weekends only (Fridays, Saturdays, and Sundays) before we officially close for the winter in October. There is an established trail, and lanterns are provided. If you have flashlights, they are always good to bring along. Wearing a light jacket is recommended. The self-guided tour takes about 1/2 hour. You walk about 1/4 mile in and 1/4 mile out. Admission includes all three attractions – cave tour, Shoshone Bird Museum, and Richard Arthur Olsen Museum of Natural History, making it an unparalleled experience for history and nature enthusiasts looking for things to do in Idaho. Reservations are not required. Please arrive before 5 p.m for the last tours of the day before closing. We are not handicap accessible. Dogs are not allowed.

Carrying on our founder’s mission to educate those who want to learn more about natural objects, worldwide histories, and cultures of the past, Idaho’s Mammoth Cave recently expanded with the opening of a second museum, dubbed the Richard Arthur Olsen Museum of Natural History that he planned to share before his passing in 2019. This new addition to the complex offers visitors an even more comprehensive view of the natural and cultural history of the world. Exhibits include an amazing array of fossils, rocks, gemstones, animals, and cultural artifacts worldwide, making it one of the most facinating things to do in Idaho.