Alum Rock, CA Elevation & Topographic Map
Elevation
230 ft 70 m200 ft 60 m190 ft 60 m170 ft 50 m140 ft 45 m130 ft 40 m
Contours every 100 ft, bold every 500 ft
USGS 3DEP · U.S. Census Bureau
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
Alum Rock sits at about 160 ft (50 m) above sea level, worked out from 2020 Census block heights on USGS 3DEP, weighted by residents.
Typical elevation
160 ft 50 m
most residents: 140–190 ft
Lowest
130 ft 40 m
on the south side
Highest
230 ft 70 m
at the foot of the Los Buellis Hills
Average
170 ft 50 m
all land inside the CDP boundary
Alum Rock spans about 100 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.
| Figure | Elevation |
|---|---|
| Typical Where people live: half of residents higher, half lower | 160 ft50 m |
| Highest point Inside the CDP boundary, at the foot of the Los Buellis Hills | 230 ft70 m |
| Lowest point Inside the CDP boundary, on the south side | 130 ft40 m |
| Airport (SJC) FAA airport elevation, the highest point of its runways, 5.1 mi west of the CDP boundary | 62 ft19 m |
| Average of all land | 170 ft50 m |
| Nearest peak Black Mountain, Santa Clara County, 7.8 mi northeast of the CDP boundary (NGS survey) | 3,955 ft1,205 m |
Elevation profile, south to north
1.0 mi south to north through the middle of Alum Rock.
Topographic Map
- Location
- Unincorporated community (census-designated place) in Santa Clara County, California, United States
- Population
- 11,873 2020 Census
- Land area
- 0.9 sq mi
- Density
- 13,710 per sq mi
- Coordinates
- 37.3680° N, 121.8235° W
- Time zone
- Pacific UTC−8 / −7
- Landform region
- Pacific Border
- Drains to
- Pacific Ocean
- Airport
- Mineta San Jose International (SJC) 62 ft
- ZIP codes 1
- 95127
⤓ Download this map
WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.
Sources: U.S. Census Bureau, USGS, FAA
Nearby Places
Nearby towns by typical elevation
- East Foothills310 ft
- Cupertino260 ft
- Cambrian Park240 ft
- Campbell210 ft
- Alum Rock160 ft
- San Jose160 ft
- Fruitdale160 ft
- Burbank, Santa Clara County120 ft
- Sunnyvale100 ft
- Santa Clara81 ft
- Milpitas37 ft
Rankings by typical elevation
- Towns in California1,172nd highest of 1,622
- Towns in Santa Clara County15th highest of 24
Peaks and hills nearest, by height
- Copernicus Peak4,360 ft
- Eylar Mountain4,087 ft
- Black Mountain, Santa Clara County3,955 ft
- Discovery Peak3,830 ft
- Mount Allison2,664 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.
- Alum Rock 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); FAA airport data; BTS time zones; NOAA NGS survey heights. All public domain.