Pompeys Pillar National Monument
Pompeys Pillar National Monument is a rock formation located in south central Montana, United States. Designated a national monument on January 17, 2001, and managed by the U.S. Bureau of Land Management in conjunction with The Friends of Pompeys Pillar, it consists of only 51 acres (21 ha), making it one of the smallest National Monuments in the U.S. The community of Pompeys Pillar lies just east of the monument.
From Wikipedia, licensed CC BY-SA 4.0.
| Designation | National Monument |
| Managed by | Bureau of Land Management |
| State | Montana |
| Size | 58 acres (computed from the boundary polygon) |
| National Conservation Lands id | NLCS000475 |
| Center point | 45.9945, -108.0031 |
| Night sky | Very dark ground, a faint glow at most (Black Marble reading 22) |
Boundary map
Boundary, simplified to about 0.005 degrees
The outline is the agency boundary simplified for display, so small parcels and inholdings may not show. The agency page has the authoritative map.
Fire nearby
- WildfireOld Divide
24 mi from the center point · 62 acres
- WildfireEagle Springs
27 mi from the center point · 122 acres
- WildfireDavis Coulee
36 mi from the center point · 15,470 acres · 20% contained
Distance is to the reported incident point, not the fire edge, and is measured from the center of a boundary that may be many miles across. Check the agency page for closures.
This unit has no confirmed official page or nearby campgrounds in the sources this site reads. The boundary, size, agency and states above come from the agency layer.
Checked nightly. Sections appear when the sources fill in.
Explore
Nearby on the other atlases
- 7.3 miHuntley Project Office ↗Ballantine, MT
Landmarks are listed first, then by distance from the boundary.
Reference
Questions people ask
How big is Pompeys Pillar National Monument?
58 acres, measured from the published boundary polygon. The agency’s own figure can differ where the boundary includes water or inholdings.
Source: How acreage is computed
Who manages Pompeys Pillar National Monument?
The Bureau of Land Management.
Source: Bureau of Land Management
What state is Pompeys Pillar National Monument in?
Montana.
Source: How states are assigned
How do I get to Pompeys Pillar National Monument?
A point inside the boundary is at 45.995, -108.003. The official page carries directions and the office address.
Source: Bureau of Land Management
Is there a fire near Pompeys Pillar National Monument right now?
3 active incidents within 50 miles as of 2026-09-17, the nearest Old Divide at 24 miles. Distance is to the reported incident point, not the fire edge.
Source: Fire nearby
How dark is the night sky at Pompeys Pillar National Monument?
NASA’s Black Marble night-lights image reads 22 on a 0 to 255 scale at the center point, very dark ground, a faint glow at most.
Source: NASA Black Marble
Are there historic places near Pompeys Pillar National Monument?
1 National Register listing within 15 miles, including Huntley Project Office.
Source: Register Atlas
Sources
- Boundary, name: the BLM National Conservation Lands layer.
- States: computed by intersecting the boundary with Census state polygons; a state is listed when it holds at least one percent of the area.
- Acreage: geodesic area of the published polygon. The agency’s official acreage can differ where the boundary includes water, easements or inholdings.
- Description: Pompeys Pillar National Monument on Wikipedia, CC BY-SA 4.0. The article was accepted because its title contains this unit’s name.
- Campgrounds: the Campsite Atlas index of federal campgrounds, matched to this boundary at build time.
- Night sky: NASA Black Marble (VIIRS, 2016 composite) sampled at zoom 6 around the center point.
- Weather, alerts, air quality, river flow and earthquakes load live in your browser from NWS, AirNow, USGS and iNaturalist when you open the page.