Petersburg Borough, AK Elevation & Topographic Map

Topographic elevation map of Petersburg Borough, Alaska, shaded from sea level on Sandborn Canal to 9,980 ft on Kates Needle
Elevation
9,980 ft 3,045 m7,490 ft 2,280 m6,240 ft 1,900 m3,740 ft 1,140 m1,250 ft 380 m0 ft 0 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.
Borough area
Fades everything outside the official borough boundary (US Census).

Elevation Data

Petersburg Borough averages about 2,250 ft (685 m) above sea level across all its land. Its ground runs from sea level on Sandborn Canal to 9,980 ft on Kates Needle.

Average elevation
2,250 ft 685 m
all land inside the borough
Highest
9,980 ft 3,045 m
on Kates Needle
Lowest
0 ft 0 m
at sea level on Sandborn Canal

Petersburg Borough spans about 9,980 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 land2,250 ft685 m
Highest point
Inside the borough, on Kates Needle (3DEP terrain model; no NGS survey height)
9,980 ft3,045 m
Lowest point
Where the land meets Sandborn Canal
0 ft0 m

Elevation profile, south to north

88 mi south to north through Petersburg.

Topographic Map

Topographic elevation map of Petersburg Borough, Alaska, shaded from sea level on Sandborn Canal to 9,980 ft on Kates Needle
Borough boundary (dashed) over shaded terrain, with contours every 500 ft (152 m).
Location
Borough in Alaska, United States
Population
3,436 2024 est.
Land area
2,901.6 sq mi + 925.8 sq mi water
Density
1.2 per sq mi
Time zone
Alaska UTC−9 / −8
Drains to
Pacific Ocean
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring boroughs and census areas sharing a border, by average

  1. Petersburg Borough2,250 ft
  2. Hoonah-Angoon Census Area1,910 ft
  3. Wrangell City and Borough1,760 ft
  4. Prince of Wales-Hyder Census Area770 ft

Rankings by average elevation

Peaks and hills highest inside

  • Kates Needle9,980 ft
  • Mount Burkett9,640 ft
  • Devils Thumb8,740 ft
  • Boundary Peak 738,250 ft
  • Mount Pratt7,870 ft
All 3 towns in Petersburg Borough by typical elevation
  1. Hobart Bay1,330 ft
  2. Kupreanof110 ft
  3. Petersburg70 ft
How we measure
  • Average: every USGS 3DEP bare-earth cell of land inside the Census borough 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, −11 ft at 57.5115° N, 133.5213° W, is in such a hollow or patch and is not counted; this coastal land's lowest point is sea level on the coast.
  • Nearby Places: neighboring boroughs and census areas 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 borough 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 borough.
  • 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.
  • Alaska: much of Alaska's 3DEP comes from airborne radar (IfSAR), good to a few meters.
  • 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.