3 units · National Monument & Preserve

National Monuments & Preserves

The National Park System has 3 units designated National Monument & Preserve, spread across 3 states and territories. Craters Of The Moon National Monument & Preserve accounts for more than half of the visits counted across the group. Most of them are free to enter.

Where they are

Free to enter Charges an entrance feePoints are the Park Service reference point for each unit, not a boundary.

Ranked by 2025 visits

All units ranked →
No. 1 · 260,418 visits · ID
Craters Of The Moon National Monument & Preserve
Entrance fee1 campground
No. 2 · 64,354 visits · OR
Oregon Caves National Monument & Preserve
Free to enter1 campground
No. 3 · 247 visits · AK
Aniakchak National Monument & Preserve
Free to enterNo alerts

States with this designation

All states →
Alaska 1Idaho 1Oregon 1

Visit counts are from the NPS Visitor Use Statistics system. Designations, fees, alerts and campgrounds are from the NPS API. Data refreshed October 14, 2026. Other unit types.