Alto, CA Elevation & Topographic Map

Topographic elevation map of Alto, California, shaded from 10 ft on the west side to 130 ft at the foot of the San Miguel Hills
Elevation
130 ft 40 m100 ft 30 m85 ft 26 m55 ft 17 m25 ft 8 m10 ft 3 m
Contours every 40 ft, bold every 200 ft
USGS 3DEP · U.S. Census Bureau
⤓ Download this map
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 CDP boundary (US Census).

Elevation Data

Alto sits at about 31 ft (9 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.

Typical elevation
31 ft 9 m
most residents: 15–38 ft
Lowest
10 ft 3 m
on the west side
Highest
130 ft 40 m
at the foot of the San Miguel Hills
Average
36 ft 11 m
all land inside the CDP boundary

Alto spans about 120 ft of height, so no single spot tells the whole story. The ruler shows where its people live, and where the other numbers you'll see come from.

FigureElevation
Typical
Where people live: half of residents higher, half lower
31 ft9 m
Highest point
Inside the CDP boundary, at the foot of the San Miguel Hills
130 ft40 m
Lowest point
Inside the CDP boundary, on the west side
10 ft3 m
Average of all land36 ft11 m
Nearest peak
Mount Tamalpais, 4.0 mi west of the CDP boundary (NGS survey)
2,576 ft785 m

Elevation profile, west to east

0.6 mi west to east through the middle of Alto.

Topographic Map

Topographic elevation map of Alto, California, shaded from 10 ft on the west side to 130 ft at the foot of the San Miguel Hills
CDP boundary (dashed) over shaded terrain, with contours every 20 ft (6 m).
Location
Unincorporated community (census-designated place) in Marin County, California, United States
Population
732 2020 Census
Land area
0.1 sq mi
Density
5,810 per sq mi
Coordinates
37.9059° N, 122.5200° W
Time zone
Pacific UTC−8 / −7
Landform region
Pacific Border
Drains to
Pacific Ocean
ZIP codes 1
94941
⤓ 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

Nearby towns by typical elevation

  1. Tamalpais-Homestead Valley280 ft
  2. Tiburon150 ft
  3. Mill Valley150 ft
  4. Kentfield130 ft
  5. Sausalito120 ft
  6. Marin City120 ft
  7. Strawberry80 ft
  8. Larkspur68 ft
  9. Belvedere53 ft
  10. Corte Madera35 ft
  11. Alto31 ft

Rankings by typical elevation

Peaks and hills nearest, by height

  • Mount Tamalpais2,576 ft
  • Rocky Ridge2,020 ft
  • Scarpet Peak1,930 ft
  • Vollmer Peak1,916 ft
  • Big Rock Ridge1,880 ft
How we measure
  • Typical elevation: the population-weighted median: every 2020 Census block inside the CDP boundary, at its USGS 3DEP height, weighted by the people who live there. Half of residents live higher, half lower.
  • Lowest, highest, average: USGS 3DEP bare-earth heights on a 1 arc-second (≈100 ft, 30 m) grid, land only, inside the Census CDP boundary (TIGER, Jan 1 2026).
  • Nearby Places: nearby towns and rankings use each town's typical elevation, so every town is compared like for like. Rankings count every city, town, township and census-designated place, including places inside a town. Peaks and hills: the nearest summits with at least 980 ft (300 m) of prominence within 62 mi (100 km), then federal (GNIS) summits within 16 mi (25 km) 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 (FAA airport elevation, 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.
  • Alto is an unincorporated community; figures cover the census-designated place, a statistical area.
  • Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (boundaries, 2020 blocks, Gazetteer areas, ZIP code areas); BTS time zones; NOAA NGS survey heights. All public domain.