How far is San Ramon, CA from Diamond, CA?
The driving distance from San Ramon, CA to Diamond, CA is about 27.7 miles (44.5 km), with a travel time of about 00h 33m by car.
- The straight-line flight distance is about 17.3 miles (27.9 km).
- For a round trip, plan for roughly 01h 06m 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 Contra Costa County, California, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between San Ramon and Diamond.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Ramon and Diamond.
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1
Start on San Ramon Valley Boulevard
1639 ft · 35 sec · San Ramon Valley Boulevard
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2
Turn left onto Crow Canyon Road
1195 ft · 30 sec · Crow Canyon Road
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3
Take the ramp slight right toward I 680 North: Sacramento
1540 ft · 38 sec
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4
Merge slight left onto Donald D Doyle Highway
9.4 mi · 11 min · Donald D Doyle Highway
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5
Continue on Senator Daniel E Boatwright Highway
5 mi · 6 min · Senator Daniel E Boatwright Highway
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6
Keep slight right to continue on CA 242 North: Concord, Pittsburg
3.9 mi · 4 min
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7
Merge slight left
7.8 mi · 9 min
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8
Take the exit slight right toward Railroad Avenue
1282 ft · 19 sec
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9
Turn left onto Railroad Avenue
1645 ft · 50 sec · Railroad Avenue
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10
Turn left onto Civic Avenue
1551 ft · 54 sec · Civic Avenue
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11
Turn left onto Dimaggio Avenue
30 m · 4 sec · Dimaggio Avenue
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12
Arrive at your destination
0 m · 1 sec · Dimaggio Avenue
Car Route Details
A richer read on the saved driving route between San Ramon and Diamond.
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.
Donald D Doyle Highway
Merge slight left onto Donald D Doyle Highway
9.36 mi · 00h 11m
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.
Mostly Sunny leaving San Ramon and Sunny near Diamond.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Ramon to Diamond?
The road trip is about 27.7 miles (44.5 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?
Pleasant Hill is a useful midpoint, sitting about 13.9 miles from San Ramon and 13.9 miles from Diamond.
How much longer is the road route than the straight-line distance?
The direct path is about 17.3 miles (27.9 km), while the road route adds roughly 10.4 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 7:24 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.65 one way or $11.31 round trip. Estimated CO2 is about 8.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around San Ramon and Sunny near Diamond.
Stop Ideas Near Pleasant Hill
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Frank H. Ogawa Plaza
Berkeley Community Media
Alameda County Marriage License
OAKLAND CITY HALL
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Pleasant Hill.
Martinez station
Emeryville station
Berkeley station
Antioch–Pittsburg
Flight Path Map
This map shows the direct air route between San Ramon and Diamond. Straight-line distance: 17.32 mi (27.88 km).
#1 San Ramon
A city in Contra Costa County, California.
| Population | 82,865 |
| Coordinates | 37.7799300, -121.9780200 |
| Altitude | 148 |
| Country | United States |
#2 Diamond
Diamond is a place in California, United States.
| Population | 0 |
| Coordinates | 38.0215900, -121.8932900 |
| Altitude | 13 |
| Country | United States |
End: Diamond (-121.89329, 38.02159)
Estimated Travel Time
Distance: 45 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 55m |
| 40 mph (64.37 km/h) | 00h 41m |
| 50 mph (80.47 km/h) | 00h 33m |
| 60 mph (96.56 km/h) | 00h 27m |
| 70 mph (112.65 km/h) | 00h 23m |
| 80 mph (129 km/h) | 00h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $5.65 | $11.31 |
| Mid-grade | $6.07 | $5.94 | $11.89 |
| Premium | $6.24 | $6.12 | $12.24 |
| Diesel | $7.57 | $7.42 | $14.83 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.