Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 18, 2026 · Editorial standards
Drive Time
33m
Distance
27.7 mi
45 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$4
one way
EV Charging
Unknown
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
San Ramon, CA
Wikimedia Commons
The drive from San Ramon, CA to Diamond, CA covers 27.7 miles and takes about 33m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Donald D Doyle Highway, CA 4, Senator Daniel E Boatwright Highway for much of the mileage, and the overall profile is mixed drive. The longest uninterrupted segment is about 9.4 miles on Donald D Doyle Highway. At current regular gas prices, budget about $3.76 one way before food or hotel costs.
Weekend Trip
Doable as a same-day drive at 33m. Total distance: 27.7 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
33m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (42%). Some complex stretches to watch for.
Scenic Drive
Mixed drive route profile with national parks nearby.
The drive from San Ramon, CA to Diamond, CA covers 27.7 miles and takes about 33m, using a mix of highways and local roads.
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.3 miles in near Crow Canyon Road.
Focused - busy navigation packed into a short drive
Balances navigation complexity with total wheel time.
This is a short but busy drive. With 10 decision points packed into just 27.7 miles, you will need to pay attention to lane changes and exits — but the whole thing is over in 33m.
Where does it get tricky?
The main spots that need attention: at 0.3 miles (Crow Canyon Road): Lane positioning matters here; at 0.5 miles: Lane positioning matters here; at 15.2 miles (CA 242): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
These are the spots where you need to pay the most attention. Preview them before you drive.
Turn left onto Crow Canyon Road
Lane positioning matters here
Take the ramp toward I 680 North: Sacramento
Lane positioning matters here
Keep slight right at fork onto CA 242 toward CA 242 North: Concord, Pittsburg
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Take the exit toward Railroad Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here
Turn left onto Civic Avenue
Lane positioning matters here
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from San Ramon, CA to Diamond, CA, road signs begin pointing toward Pittsburg along the way.
Pittsburg
| Road | Distance | Duration |
|---|---|---|
| Donald D Doyle Highway | 9.4 mi | 10m |
| CA 4 | 7.8 mi | 8m |
| Senator Daniel E Boatwright Highway | 5 mi | 5m |
| CA 242 | 3.9 mi | 4m |
| Railroad Avenue | 0.3 mi | <1m |
| San Ramon Valley Boulevard | 0.3 mi | <1m |
| Civic Avenue | 0.3 mi | <1m |
| Crow Canyon Road | 0.2 mi | <1m |
Step-by-step road directions between San Ramon, CA and Diamond, CA.
Start on San Ramon Valley Boulevard
Turn left onto Crow Canyon Road
Take the ramp
Merge onto I 680
Continue on I 680
Keep slight right at fork onto CA 242
Merge onto CA 4
Take the exit
Turn left onto Railroad Avenue
Turn left onto Civic Avenue
Turn left onto Dimaggio Avenue
Arrive at destination
Regular Gas
$3.76 one way
$7.52 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $3.85 | $4.20 | $8.40 |
| premium | $4.15 | $4.53 | $9.05 |
| diesel | $3.75 | $4.09 | $8.18 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$4
Estimated CO2 emission: 9.7 kg one way.
Driving Electric?
About $3 in charging · 0 stops · 70% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 8.3 | 0 | $2.91 | $1.33 |
| Efficient EV | 6.9 | 0 | $2.42 | $1.11 |
| EV Truck/SUV | 11.1 | 0 | $3.88 | $1.77 |
Gas CO2
10 kg
EV CO2
3 kg (70% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Current conditions at both ends of the drive.
Origin
Late night in San Ramon on Saturday
Local time
3:23 AM
PDT
Current temp
43°F
Partly Cloudy
Freeze Warning
Freeze Warning issued April 17 at 7:10PM PDT until April 18 at 8:00AM PDT by NWS Eureka CA
Destination
Late night in Diamond on Saturday
Local time
3:23 AM
PDT
Current temp
48°F
Partly Cloudy
Freeze Warning
Freeze Warning issued April 17 at 7:10PM PDT until April 18 at 8:00AM PDT by NWS Eureka CA
Time zone
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and NPS for national parks. See our methodology for refresh cadence and limitations.
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