Welcome to the Shoshone Bird Museum of Natural History Online! The Shoshone Bird Museum of Natural History is located at the same location as Idaho's Mammoth Cave, located 8 miles north of Shoshone, Idaho, on scenic state highway 75. Summer hours are 9 a.m. to 6 p.m., 7 days a week. Idaho's Mammoth Cave and Museum admission rate Adults, $10.00 16 and under, $5.00 6 and under, Free After September 15th, each year, we will open for groups of 8 or more. For more information, contact us at: (208) 329-5382