Jewel Cave National Monument maps
National monument in South Dakota, managed by the National Park Service.
Cartahaven has 3 maps covering Jewel Cave National Monument: 3 Forest Service maps. All of them are free. Download one to your phone and the map app shows your GPS position on it with no cell signal, along with your tracks, placemarks and, in the US, who manages the land around you.
Check current conditions, closures and regulations with the National Park Service before you go. Maps are aids, not guarantees.
Where each map covers
Maps

Buffalo Gap National Grassland Motor Vehicle Use Map (MVUM), Fall River Ranger District (2020)
Forest Service Maps (public domain) · Nebraska National Forests and Grasslands
Public domain

Highwood Mountains Motor Vehicle Use Map (MVUM) — Helena-Lewis and Clark National Forest (2023)
Forest Service Maps (public domain) · Helena-Lewis and Clark National Forest
Public domain

Little Belt Mountains Motor Vehicle Use Map (MVUM) — Helena-Lewis and Clark National Forest (2023)
Forest Service Maps (public domain) · Helena-Lewis and Clark National Forest
Public domain
Boundary: National Park Service, simplified.