Swinomish Reservation, WA Elevation & Topographic Map

Topographic elevation map of Swinomish Reservation, Washington, shaded from sea level on the Salish Sea to 440 ft on the south side
Elevation
440 ft 135 m330 ft 100 m280 ft 85 m170 ft 50 m55 ft 17 m0 ft 0 m
Contours every 200 ft, bold every 1,000 ft
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.
Area
Fades everything outside the official reservation boundary (US Census).

Elevation Data

Swinomish Reservation averages about 150 ft (45 m) above sea level across all its land. Its ground runs from sea level on the Salish Sea to 440 ft on the south side.

Average elevation
150 ft 45 m
all land inside the reservation
Highest
440 ft 135 m
on the south side
Lowest
0 ft 0 m
at sea level on the Salish Sea

Swinomish Reservation spans about 440 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 land150 ft45 m
Highest point
Inside the reservation, on the south side
440 ft135 m
Lowest point
Where the land meets the Salish Sea
0 ft0 m

Elevation profile, south to north

7.9 mi south to north through the middle of Swinomish Reservation.

Topographic Map

Topographic elevation map of Swinomish Reservation, Washington, shaded from sea level on the Salish Sea to 440 ft on the south side
Census reservation boundary (dashed) over shaded terrain, with contours every 100 ft (30 m).
Location
Reservation, with off-reservation trust land in Washington, United States (U.S. Census Bureau)
Population
3,228 2020 Census
Land area
11.9 sq mi + 9.1 sq mi water
Density
271 per sq mi
Time zone
Pacific UTC−8 / −7
Landform region
Pacific Border 95%
Drains to
Strait of Juan de Fuca
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WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.

Sources: U.S. Census Bureau, USGS

Nearby Places

Nearest tribal lands nearest, by average

  1. Upper Skagit Reservation300 ft
  2. Samish TDSA280 ft
  3. Tulalip Reservation240 ft
  4. Swinomish Reservation150 ft
  5. Stillaguamish Reservation120 ft
  6. Lummi Reservation53 ft

Rankings by average elevation

How we measure
  • Average: every USGS 3DEP bare-earth cell of land inside the Census reservation boundary (TIGER/Line AIANNH, Jan 1 2026), weighted equally, on a 1 arc-second (≈100 ft, 30 m) grid. Land means the boundary minus Census area water.
  • Highest and lowest: the highest land cell. Lowest: the lowest land cell; 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, −3 ft at 48.3629° N, 122.5387° W, is in such a hollow or patch and is not counted; this coastal land's lowest point is sea level on the coast.
  • Name: the Census Bureau's legal or statistical area name, as published; the nation's own name may differ.
  • Population: 2020 Census residents of the blocks inside the boundary.
  • Nearby Places: nearest tribal lands 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 reservation 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).
  • 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); NOAA NGS survey heights; BTS time zones. All public domain.