Prairie County, MT Elevation & Topographic Map
Elevation
3,600 ft 1,095 m3,230 ft 985 m3,040 ft 930 m2,670 ft 815 m2,310 ft 705 m2,120 ft 645 m
Zoom in for contour lines
USGS 3DEP · U.S. Census Bureau
How to use this mapviews, tools and data
- Elevation
- Ground colored by height from green (lowest) to white (highest), with contour lines every 40–500 ft (USGS data).
- Satellite
- A 2016 satellite photo at 33 ft (10 m) detail; contours off.
- 3D
- Tilt and turn the terrain; hills are raised 1.5×, or set ×1 for true height.
- Click or tap anywhere
- The exact elevation of that spot in ft and m.
- Measure
- Pick two points for the climb, descent and grade along a straight line.
- County area
- Fades everything outside the official county boundary (US Census).
Elevation Data
Prairie County averages about 2,720 ft (830 m) above sea level across all its land. Its ground runs from 2,120 ft on the east side to 3,600 ft on Big Sheep Mountain.
Average elevation
2,720 ft 830 m
all land inside the county
Highest
3,600 ft 1,095 m
on Big Sheep Mountain
Lowest
2,120 ft 645 m
on the east side
Prairie County spans about 1,480 ft of height, so no single spot tells the whole story. The ruler shows where most of its land lies, and where the other numbers you'll see come from.
| Figure | Elevation |
|---|---|
| Average of all land | 2,720 ft830 m |
| Highest point Inside the county, on Big Sheep Mountain (3DEP terrain model; no NGS survey height) | 3,600 ft1,095 m |
| Lowest point Inside the county, on the east side | 2,120 ft645 m |
Elevation profile, south to north
28 mi south to north through Terry.
Topographic Map
- Location
- County in Montana, United States
- Population
- 1,112 2024 est.
- Land area
- 1,736.6 sq mi + 5.8 sq mi water
- Density
- 0.6 per sq mi
- Time zone
- Mountain UTC−7 / −6
- Landform region
- Great Plains
- Drains to
- Gulf of America
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Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Fallon County3,000 ft
- Custer County2,830 ft
- Garfield County2,820 ft
- Prairie County2,720 ft
- Wibaux County2,710 ft
- Dawson County2,560 ft
- McCone County2,470 ft
Rankings by average elevation
- Counties in Montana45th highest of 54
- Counties in the United States436th highest of 3,151
Peaks and hills highest inside
- Big Sheep Mountain, Prairie County3,600 ft
- Little Sheep Mountain, Prairie County3,510 ft
- Bowgun Butte2,930 ft
- Flat Top Butte2,858 ft
- Eagle Butte, Prairie County2,790 ft
How we measure
- Average: every USGS 3DEP bare-earth cell of land inside the Census county boundary (TIGER/Line, Jan 1 2026), weighted equally, on a 2 arc-second (≈200 ft, 62 m) grid, coarsened from 1 arc-second so the whole area fits one run. Land means the boundary minus Census area water (on this grid, water areas of at least half a cell).
- Highest and lowest: the highest land cell, re-read at 1 arc-second around the 25 highest grid cells; it is a named summit, so its height is the peak method: the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a survey mark sits within 160 ft (50 m) of it. Lowest: the lowest land cell, re-read at 1 arc-second around the 25 lowest grid cells; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
- Nearby Places: neighboring counties and rankings use each one's average elevation, on its own grid, the same figure its page shows. Peaks and hills: the highest summits inside the county with at least 980 ft (300 m) of prominence, then the highest federal (GNIS) summits inside it when there are fewer than 5; each is the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a usable survey mark sits within 160 ft (50 m) of it (shown as published).
- Towns: each town's typical elevation (population-weighted median of its own 2020 blocks at 1 arc-second); a town is listed when any of its 2020 residents live in the county.
- Rounding: computed heights are rounded to 10 ft (5 m), or to 1 ft (1 m) under 100 ft; 3DEP is good to about a meter, not a foot. Published figures (NGS survey heights) are shown as their publisher gives them.
- Datum: North American Vertical Datum of 1988 (NAVD 88). NGS plans to replace NAVD 88 with a new datum (NAPGD2022); heights will then shift slightly.
- Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (TIGER boundaries and water, 2020 blocks, 2024 population estimates, county adjacency); NOAA NGS survey heights; BTS time zones. All public domain.