Custer County, ID Elevation & Topographic Map
Elevation
12,630 ft 3,850 m10,470 ft 3,195 m9,400 ft 2,865 m7,240 ft 2,205 m5,080 ft 1,550 m4,010 ft 1,220 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 7,600 ft (2,315 m) above sea level across all its land. Its ground runs from 4,010 ft on the northwest side to 12,630 ft on Borah Peak.
Average elevation
7,600 ft 2,315 m
all land inside the county
Highest
12,630 ft 3,850 m
on Borah Peak
Lowest
4,010 ft 1,220 m
on the northwest side
Custer County spans about 8,620 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 | 7,600 ft2,315 m |
| Highest point Inside the county, on Borah Peak (3DEP terrain model; no NGS survey height) | 12,630 ft3,850 m |
| Lowest point Inside the county, on the northwest side | 4,010 ft1,220 m |
Elevation profile, south to north
73 mi south to north through Challis.
Topographic Map
- Location
- County in Idaho, United States
- Population
- 4,597 2024 est.
- Land area
- 4,922.2 sq mi + 16.4 sq mi water
- Density
- 0.9 per sq mi
- Time zone
- Mountain UTC−7 / −6
- Landform region
- Northern Rocky Mountains
- Drains to
- Pacific Ocean 75%, Closed basin (does not reach the sea) 25%
⤓ Download this map
WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.
Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Custer County7,600 ft
- Lemhi County6,930 ft
- Valley County6,510 ft
- Blaine County6,140 ft
- Butte County5,990 ft
- Boise County5,520 ft
- Elmore County4,740 ft
Rankings by average elevation
- Counties in Idahohighest of 44
- Counties in the United States41st highest of 3,151
Peaks and hills highest inside
- Borah Peak12,630 ft
- Mount Breitenbach12,130 ft
- Standhope Peak11,870 ft
- Ryan Peak11,690 ft
- Glassford Peak11,570 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 3 arc-second (≈300 ft, 93 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.
- 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, 4,010 ft at 44.8068° N, 114.8132° 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.