Custer County, MT Elevation & Topographic Map
Elevation
3,790 ft 1,155 m3,400 ft 1,035 m3,200 ft 975 m2,810 ft 860 m2,430 ft 740 m2,230 ft 680 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
Custer County averages about 2,830 ft (865 m) above sea level across all its land. Its ground runs from 2,230 ft on the north side to 3,790 ft on the southwest side.
Average elevation
2,830 ft 865 m
all land inside the county
Highest
3,790 ft 1,155 m
on the southwest side
Lowest
2,230 ft 680 m
on the north side
Custer County spans about 1,560 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 | 2,830 ft865 m |
| Highest point Inside the county, on the southwest side | 3,790 ft1,155 m |
| Lowest point Inside the county, on the north side | 2,230 ft680 m |
Elevation profile, south to north
74 mi south to north through Miles City.
Topographic Map
- Location
- County in Montana, United States
- Population
- 11,964 2024 est.
- Land area
- 3,783.3 sq mi + 9.9 sq mi water
- Density
- 3.2 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
- Powder River County3,490 ft
- Carter County3,410 ft
- Rosebud County3,100 ft
- Fallon County3,000 ft
- Custer County2,830 ft
- Garfield County2,820 ft
- Prairie County2,720 ft
Rankings by average elevation
- Counties in Montana43rd highest of 54
- Counties in the United States413th highest of 3,151
Peaks and hills highest inside
- Hayes Point3,767 ft
- Maxwell Butte3,728 ft
- Red Butte, Custer County3,670 ft
- Twin Buttes, Custer County3,490 ft
- Wild Horse Mountain, Custer County3,430 ft
All 2 towns in Custer County by typical elevation
- Ismay2,540 ft
- Miles City2,360 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. 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.
- Pits: the lowest point is the lowest ground outside closed hollows (quarry floors, mine pits, terrain-model artifacts): any hollow under 0.4 sq mi (1 km²), and any hollow under 2 sq mi (5 km²) whose floor is more than 100 ft (30 m) below its rim; and outside patches below sea level of under 0.4 sq mi (1 km²). The single lowest 3DEP cell, 2,230 ft at 46.6571° N, 105.5115° W, is in such a hollow or patch and is not counted.
- 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.