Idaho’s Mammoth Cave near Shoshone combines a self-guided lava-tube walk with two natural-history museums.
Plan your visit
251 W Thorn Creek Rd, Shoshone, Idaho 83352
- Admission
- Adults $15; ages 6–12 $9; ages 5 and under free; cave and both museums included
- Hours
- Closed for winter under the published 2026 schedule; next-season opening unconfirmed
- Parking
- Parking arrangements need confirmation
- Restrooms
- Current availability needs confirmation
- Access
- Operator states the attraction is not wheelchair accessible
- Setting
- Both
Photos have not been added to this listing yet.
🌳 Amenities & Features
- 🌋 Lava-tube cave
- 🦅 Shoshone Bird Museum
- 🏛️ Richard Arthur Olsen Museum
- 🦴 Fossils and natural-history collections
- 🔦 Provided lanterns
💡 Good to Know
- The admission page gives September 28, 2026 as the winter closing date. A separate article gives September 29; both dates have passed. Call 208-329-5382 to confirm the next opening before traveling.
- The cave walk is about half a mile round trip. Bring sturdy shoes and a jacket. During the published operating season, reservations are not required and final entry is before 5 p.m. Pets are not permitted; the operator’s homepage makes an exception for ADA service animals.
Official information · Admission and seasonal schedule · Contact and access information
Listing review date: 2026-10-15