How far is Castro Valley, CA from San Francisco, CA?
The driving distance from Castro Valley, CA to San Francisco, CA is about 25.8 miles (41.5 km), with a travel time of about 00h 33m by car.
- The straight-line flight distance is about 19 miles (30.6 km).
- For a round trip, plan for roughly 01h 07m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM PDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 00h 33m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in California
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Castro Valley and San Francisco.
Turn-by-Turn Driving Directions
Step-by-step road directions between Castro Valley and San Francisco.
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1
Start on Lake Chabot Road
18 m · 5 sec · Lake Chabot Road
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2
Turn left onto Castro Valley Boulevard
1684 ft · 34 sec · Castro Valley Boulevard
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3
Take the ramp slight right toward I 580 West: Oakland
1502 ft · 37 sec
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4
Merge slight left onto MacArthur Freeway
8.2 mi · 9 min · MacArthur Freeway
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5
Keep slight left to continue on MacArthur Freeway
7.2 mi · 8 min · MacArthur Freeway
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6
Take the exit slight left toward I 80 West: San Francisco
1.5 km · 1 min
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7
Merge slight right onto Dwight D. Eisenhower Highway
1015 ft · 17 sec · Dwight D. Eisenhower Highway
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8
Turn slight left onto Dwight D. Eisenhower Highway
1959 ft · 33 sec · Dwight D. Eisenhower Highway
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9
Keep slight left to continue on Dwight D. Eisenhower Highway
5.5 mi · 8 min · Dwight D. Eisenhower Highway
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10
Continue on Route 80
1438 ft · 24 sec · Route 80
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11
Continue on Route 80
1.2 km · 1 min · Route 80
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12
Continue on Route 80
1893 ft · 32 sec · Route 80
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13
Keep slight right to continue on US 101 North: Golden Gate Bridge
1919 ft · 39 sec
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14
Merge slight right onto Central Freeway
1462 ft · 25 sec · Central Freeway
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15
Continue on Octavia Boulevard
2490 ft · 42 sec · Octavia Boulevard
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16
Turn right onto Market Street
629 ft · 32 sec · Market Street
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17
Keep slight right to continue on Market Street
961 ft · 35 sec · Market Street
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18
Arrive at your destination
0 m · 1 sec · Market Street
Car Route Details
A richer read on the saved driving route between Castro Valley and San Francisco.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
MacArthur Freeway
Merge slight left onto MacArthur Freeway
8.17 mi · 00h 09m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Sunny leaving Castro Valley and Mostly Sunny near San Francisco.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Castro Valley to San Francisco?
The road trip is about 25.8 miles (41.5 km) and usually takes 00h 33m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Piedmont is a useful midpoint, sitting about 12.9 miles from Castro Valley and 12.9 miles from San Francisco.
How much longer is the road route than the straight-line distance?
The direct path is about 19 miles (30.6 km), while the road route adds roughly 6.8 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 7:00 AM to 7:00 PM PDT. If you want a more comfortable same-day return, try to leave by 7:22 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.25 one way or $10.50 round trip. Estimated CO2 is about 8.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Castro Valley and Mostly Sunny near San Francisco.
Stop Ideas Near Piedmont
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
San Francisco City Hall Wedding Photographer
Alameda Public Works Department
Old Berkeley City Hall
My City Hall Wedding
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Piedmont.
Emeryville station
Oakland – Jack London Square station
Berkeley station
Oakland Coliseum station
Flight Path Map
This map shows the direct air route between Castro Valley and San Francisco. Straight-line distance: 19.04 mi (30.64 km).
#1 Castro Valley
A city in Alameda County, California.
| Population | 61,388 |
| Coordinates | 37.6941000, -122.0863500 |
| Altitude | 50 |
| Country | United States |
#2 San Francisco
The seventeenth most populous city in the United States and the center of the San Francisco Bay Area.
| Population | 866,606 |
| Coordinates | 37.7749300, -122.4194200 |
| Altitude | 16 |
| Country | United States |
End: Market Street (-122.419433, 37.774953)
Estimated Travel Time
Distance: 41 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 51m |
| 40 mph (64.37 km/h) | 00h 38m |
| 50 mph (80.47 km/h) | 00h 30m |
| 60 mph (96.56 km/h) | 00h 25m |
| 70 mph (112.65 km/h) | 00h 22m |
| 80 mph (129 km/h) | 00h 19m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $5.25 | $10.50 |
| Mid-grade | $6.07 | $5.52 | $11.04 |
| Premium | $6.24 | $5.68 | $11.36 |
| Diesel | $7.57 | $6.89 | $13.77 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in California · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.