Lewis and Clark County, MT Elevation & Topographic Map

Topographic elevation map of Lewis and Clark County, Montana, shaded from 3,420 ft on the east side to 9,413 ft on Red Mountain
Elevation
9,410 ft 2,870 m7,920 ft 2,415 m7,170 ft 2,185 m5,670 ft 1,730 m4,170 ft 1,270 m3,420 ft 1,045 m
Zoom in for contour lines
USGS 3DEP · U.S. Census Bureau
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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

Lewis and Clark County averages about 5,360 ft (1,635 m) above sea level across all its land. Its ground runs from 3,420 ft on the east side to 9,413 ft on Red Mountain.

Average elevation
5,360 ft 1,635 m
all land inside the county
Highest
9,413 ft 2,869 m
on Red Mountain
Lowest
3,420 ft 1,045 m
on the east side

Lewis and Clark County spans about 5,990 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.

FigureElevation
Average of all land5,360 ft1,635 m
Highest point
Inside the county, on Red Mountain (NGS survey height)
9,413 ft2,869 m
Lowest point
Inside the county, on the east side
3,420 ft1,045 m

Elevation profile, west to east

31 mi west to east through Helena.

Topographic Map

Topographic elevation map of Lewis and Clark County, Montana, shaded from 3,420 ft on the east side to 9,413 ft on Red Mountain
County boundary (dashed) over shaded terrain, with contours every 500 ft (152 m).
Location
County in Montana, United States
Population
75,129 2024 est.
Land area
3,458.4 sq mi + 39.2 sq mi water
Density
22 per sq mi
Time zone
Mountain UTC−7 / −6
Landform region
Northern Rocky Mountains 94%
Drains to
Gulf of America 75%, Pacific Ocean 25%
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Jefferson County5,890 ft
  2. Meagher County5,870 ft
  3. Powell County5,690 ft
  4. Lewis and Clark County5,360 ft
  5. Broadwater County5,080 ft
  6. Flathead County4,980 ft
  7. Teton County4,490 ft
  8. Cascade County4,300 ft

Rankings by average elevation

Peaks and hills highest inside

  • Red Mountain9,413 ft
  • Scapegoat Mountain9,208 ft
  • Slategoat Mountain8,892 ft
  • Olson Peak8,870 ft
  • Crown Mountain8,380 ft
All 18 towns in Lewis and Clark County by typical elevation
  1. Marysville5,440 ft
  2. Rimini5,280 ft
  3. Unionville5,010 ft
  4. Lincoln4,540 ft
  5. Canyon Creek4,300 ft
  6. Milford Colony4,220 ft
  7. Augusta4,080 ft
  8. Helena4,050 ft
  9. Helena West Side4,010 ft
  10. Gilman4,010 ft
  11. York3,970 ft
  12. East Helena3,880 ft
  13. Helena Valley Northwest3,870 ft
  14. Helena Valley Southeast3,800 ft
  15. Helena Valley West Central3,770 ft
  16. Helena Valley Northeast3,740 ft
  17. Wolf Creek3,610 ft
  18. Craig3,460 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.
  • 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.