Union County, OR Elevation & Topographic Map

Topographic elevation map of Union County, Oregon, shaded from 2,100 ft on the north side to 9,550 ft on Eagle Cap
Elevation
9,550 ft 2,910 m7,690 ft 2,345 m6,760 ft 2,060 m4,900 ft 1,495 m3,040 ft 925 m2,100 ft 640 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

Union County averages about 4,320 ft (1,315 m) above sea level across all its land. Its ground runs from 2,100 ft on the north side to 9,550 ft on Eagle Cap.

Average elevation
4,320 ft 1,315 m
all land inside the county
Highest
9,550 ft 2,910 m
on Eagle Cap
Lowest
2,100 ft 640 m
on the north side

Union County spans about 7,450 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 land4,320 ft1,315 m
Highest point
Inside the county, on Eagle Cap (3DEP terrain model; no NGS survey height)
9,550 ft2,910 m
Lowest point
Inside the county, on the north side
2,100 ft640 m

Elevation profile, west to east

54 mi west to east through La Grande.

Topographic Map

Topographic elevation map of Union County, Oregon, shaded from 2,100 ft on the north side to 9,550 ft on Eagle Cap
County boundary (dashed) over shaded terrain, with contours every 500 ft (152 m).
Location
County in Oregon, United States
Population
26,058 2024 est.
Land area
2,036.9 sq mi + 1.9 sq mi water
Density
13 per sq mi
Time zone
Pacific UTC−8 / −7
Landform region
Columbia Plateau
Drains to
Pacific Ocean
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Grant County4,700 ft
  2. Wallowa County4,470 ft
  3. Baker County4,370 ft
  4. Union County4,320 ft
  5. Umatilla County2,650 ft

Rankings by average elevation

Peaks and hills highest inside

  • Eagle Cap9,550 ft
  • Needle Point9,000 ft
  • Mount Emily6,114 ft
  • Johnson Rock5,730 ft
  • Clark Mountain5,530 ft
All 8 towns in Union County by typical elevation
  1. North Powder3,270 ft
  2. Cove2,940 ft
  3. La Grande2,790 ft
  4. Union2,790 ft
  5. Island City2,740 ft
  6. Imbler2,730 ft
  7. Summerville2,710 ft
  8. Elgin2,700 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.
  • 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, 2,100 ft at 45.8332° N, 117.7479° 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.