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Alto California Map

Explore Alto, California, with this interactive street and satellite map.

This page also offers TOPO MAPS — the official USGS topographic sheets — plus USGS aerial imagery, a labelled USNG grid overlay, a distance and bearing tool, and a GPS grid-reference readout. See How to Use This Map below.

Interactive Map of Alto, California

How to Use This Alto, California Map

This interactive map shows the street layout and satellite imagery for Alto, California. Use the Map and Satellite buttons above to switch between street map and aerial imagery views. Use the + and − buttons to zoom in or out, or scroll your mouse wheel while holding the Control key to zoom. On a touchscreen, use a two-finger pinch gesture. Drag the map to pan to any area of California or beyond.

Click ⛶ Fullscreen to expand the map to fill your screen. To return to the normal page view, press the Escape key, click the ✕ Exit Fullscreen button that appears above the map, or on a mobile device tap the back button (Android) or the close icon (iOS).

TOPO MAPS — NEW. Click the green 🔍 Search Maps button below the map to open a second map with a Base map row offering three choices. OSM is the standard OpenStreetMap street map. Topo shows the official USGS topographic maps from The National Map — contours, hydrography, land cover and shaded relief, the same mapping used for hiking, hunting and back-country navigation in the Adirondacks, the Catskills and the Finger Lakes. Imagery shows USGS aerial photography, mostly 1-metre NAIP. The search box finds any US town, county or landmark by name, so you are not limited to Alto.

Reading the map like a paper quad. Click Grid to overlay the U.S. National Grid (USNG), labelled along the edges exactly as a printed topographic sheet is — at normal zoom the squares are one kilometre across, so you can read a six-figure grid reference by eye and judge distance directly off the map. Click Measure, then tap two points, to get the distance between them together with the grid bearing in degrees and mils, the true bearing, and the magnetic bearing to set on a compass.

Click 📍 My position to take a single GPS reading from your device. It marks where you are and reports your position as a USNG grid reference as well as plain latitude and longitude — USNG being the format FEMA and US search and rescue teams work from — with a Copy position button so you can paste it straight into a text message. It takes one reading and stops, rather than tracking continuously, to conserve your battery. Note that map tiles need cell coverage, but a GPS reading does not — your coordinates stay correct even where the map itself cannot load.

City	Alto
State	California (CA)
County	Marin County
Country	United States of America
Timezone	Pacific Time (America/Los_Angeles)

Latitude	37.90437
Longitude	-122.525531
Population	732
Density	2243.1 /km²
Incorporated	N/A
ZIP Code	94941
Area Code	510
County Seat	San Rafael
School District	Mill Valley Elementary School District

🌦 Goto Alto Weather Page: Alto, California — Weather Warnings, Forecast, Radar, Satellite & Current Conditions

About Alto, California

Alto is a locality in Marin County, California, United States. It is a small community with a population of 732. The population density is 2243.1 people per km². Alto is located at 37.9044°N, 122.5255°W. It observes the Pacific Time (America/Los_Angeles) timezone. ZIP code: 94941.

Alto sits where the salt-heavy air of the Pacific Ocean meets the quiet, brackish edges of the marshlands. It lies 1.1 miles east of Mill Valley, CA (from Mill Valley, CA: bearing 96°T), and is situated 9.9 miles west-southwest of Richmond. The landscape around Alto is defined by the steady movement of the tides and the proximity to the Mill Valley/Sausalito Path, which winds like a thread through the low-lying terrain. To the west, the distant summits of the Coast Ranges catch the fading light, turning a bruised violet as the fog rolls in from the water. Nearby, the Arroyo Corte Madera Del Presidio channels the seasonal runoff toward the harbor, while the salt-kissed breezes keep the climate tempered and cool. Silva Island rises from the surrounding shallows, a solitary landmark that marks the transition between the solid earth and the fluid expanse of the bay.

Alto preserves a quiet character that speaks to its origins as a transit point, long defined by the rhythm of the rails that once linked the northern reaches to the ferry landings. Today, the economy of Alto reflects the broader commerce of the region, functioning as a residential sanctuary for those who look toward the harbor for their livelihood. Residents often walk the Harvey Warne Trail, finding a meditative stillness in the path that mirrors the slow drift of the water toward the horizon. Though the bustle of modern life presses in from all sides, Alto maintains a deliberate pace, colored by the seasonal cycle of the nearby Haypress Pond and the hidden, cascading waters of Dawn Falls. Even as the decades move forward, the essence of the place remains tied to the tide, the salt, and the persistent, quiet growth of the coastal scrub.

Nearby Outdoor Places

Bayfront Park (Local Park) — 0.5 mi, 182° S
Mill Valley Golf Course (Local Recreation) — 0.6 mi, 330° NW
La Cresta Open Space (Local Recreation) — 0.8 mi, 083° E
Blithedale Summit Open Space Preserve (Local Conservation Area) — 0.9 mi, 315° NW
Ring Mountain Open Space Preserve (Local Conservation Area) — 1.1 mi, 085° E
Mayor's Lookout (Viewpoint) — 1.2 mi, 305° NW
Golden Gate National Recreation Area (National Recreation Area) — 1.3 mi, 224° SW · 113k acres
Corte Madera Marsh State Marine Park (Marine Protected Area) — 1.6 mi, 031° NE
Corte Madera Marsh Ecological Reserve (State Conservation Area) — 1.6 mi, 031° NE
Mount Tamalpais State Park (State Park) — 1.9 mi, 244° SW
Blackie Horse Statue (Public Artwork) — 2.0 mi, 106° E
Muir Woods National Monument (National Monument) — 2.1 mi, 251° W · 527 acres
The Rosebowl (Monument) — 2.2 mi, 348° N
Slide House (Attraction) — 2.6 mi, 011° N
Giant Picnic Table (Attraction) — 2.6 mi, 011° N
Redwood Tree Slice (Attraction) — 2.7 mi, 254° W
Founders Grove (Attraction) — 2.7 mi, 255° W
Sitting Bull Rock and memorial (Monument) — 2.9 mi, 299° NW
Marinship Exhibit (Museum) — 3.3 mi, 149° SE
IDESST Sausalito Portuguese Cultural Center (Museum) — 3.6 mi, 147° SE
Old Hilary's Botanical Preserve (Nature Reserve) — 4.1 mi, 113° SE
Monterey Bay National Marine Sanctuary (Marine Protected Area) — 4.1 mi, 209° SW
San Rafael Open Space (Nature Reserve) — 4.1 mi, 352° N
Hill 88 (Historic Ruins) — 4.3 mi, 185° S
Tiburon Playhouse (Cinema) — 4.3 mi, 120° SE
California Coastal National Monument (National Monument) — 4.5 mi, 225° SW · 8,946 acres
Lyford's Stone Tower (Monument) — 4.7 mi, 117° SE
Marin County Historical Society Museum (Museum) — 4.9 mi, 358° N
Nike Missile Site SF-88 (Museum) — 5.3 mi, 181° S
Battery Construction 129 (Historic Ruins) — 5.4 mi, 166° S

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