Marin County, CA Elevation & Topographic Map

Topographic elevation map of Marin County, California, shaded from sea level on San Pablo Bay to 2,576 ft on Mount Tamalpais
Elevation
2,580 ft 785 m1,930 ft 590 m1,610 ft 490 m970 ft 295 m320 ft 100 m0 ft 0 m
Contours every 500 ft, bold every 2,500 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.
County area
Fades everything outside the official county boundary (US Census).

Elevation Data

Marin County averages about 430 ft (130 m) above sea level across all its land. Its ground runs from sea level on San Pablo Bay to 2,576 ft on Mount Tamalpais.

Average elevation
430 ft 130 m
all land inside the county
Highest
2,576 ft 785 m
on Mount Tamalpais
Lowest
0 ft 0 m
at sea level on San Pablo Bay

Marin County spans about 2,580 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 land430 ft130 m
Highest point
Inside the county, on Mount Tamalpais (NGS survey height)
2,576 ft785 m
Lowest point
Where the land meets San Pablo Bay
0 ft0 m

Elevation profile, west to east

35 mi west to east through San Rafael.

Topographic Map

Topographic elevation map of Marin County, California, shaded from sea level on San Pablo Bay to 2,576 ft on Mount Tamalpais
County boundary (dashed) over shaded terrain, with contours every 200 ft (61 m).
Location
County in California, United States
Population
256,400 2024 est.
Land area
520.1 sq mi + 308.0 sq mi water
Density
493 per sq mi
Time zone
Pacific UTC−8 / −7
Landform region
Pacific Border 95%
Drains to
Pacific Ocean
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Sonoma County730 ft
  2. Contra Costa County500 ft
  3. Marin County430 ft
  4. San Francisco County180 ft

Rankings by average elevation

Peaks and hills highest inside

  • Mount Tamalpais2,576 ft
  • East Peak, Marin County2,567 ft
  • Middle Peak, Marin County2,510 ft
  • Ballou Point2,090 ft
  • Big Rock Ridge1,880 ft
All 31 towns in Marin County by typical elevation
  1. San Geronimo580 ft
  2. Lagunitas-Forest Knolls580 ft
  3. Woodacre490 ft
  4. Sleepy Hollow470 ft
  5. Dillon Beach360 ft
  6. Inverness320 ft
  7. Tamalpais-Homestead Valley280 ft
  8. Fairfax220 ft
  9. Muir Beach210 ft
  10. Nicasio180 ft
  11. Lucas Valley-Marinwood180 ft
  12. Ross170 ft
  13. Bolinas170 ft
  14. Tiburon150 ft
  15. Mill Valley150 ft
  16. Kentfield130 ft
  17. Sausalito120 ft
  18. San Anselmo120 ft
  19. Marin City120 ft
  20. Tomales110 ft
  21. Black Point-Green Point88 ft
  22. Novato83 ft
  23. Strawberry80 ft
  24. Point Reyes Station75 ft
  25. Larkspur68 ft
  26. San Rafael61 ft
  27. Belvedere53 ft
  28. Corte Madera35 ft
  29. Alto31 ft
  30. Santa Venetia17 ft
  31. Stinson Beach16 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 1 arc-second (≈100 ft, 30 m) grid. Land means the boundary minus Census area water.
  • Highest and lowest: the highest land cell; 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; 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, −340 ft at 37.9871° N, 122.4524° 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 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.