How far is Diamond, CA from Walnut Creek, CA?
The driving distance from Diamond, CA to Walnut Creek, CA is about 16.3 miles (26.2 km), with a travel time of about 00h 18m by car.
- The straight-line flight distance is about 12.3 miles (19.8 km).
- For a round trip, plan for roughly 00h 37m 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 18m.
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.
The third most populous city in Contra Costa County, 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 Diamond and Walnut Creek.
Turn-by-Turn Driving Directions
Step-by-step road directions between Diamond and Walnut Creek.
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1
Start on Dimaggio Avenue
30 m · 6 sec · Dimaggio Avenue
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2
Turn right onto West 17th Street
79 m · 11 sec · West 17th Street
-
3
Continue on Civic Avenue
1239 ft · 38 sec · Civic Avenue
-
4
Turn right onto Railroad Avenue
865 ft · 21 sec · Railroad Avenue
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5
Take the ramp slight right toward CA 4 West: Hercules
2562 ft · 36 sec
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6
Merge slight left
7.1 mi · 8 min
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7
Keep slight right to continue on CA 242: Oakland, Concord
4.6 mi · 5 min
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8
Merge slight left onto Senator Daniel E Boatwright Highway
2.4 mi · 3 min · Senator Daniel E Boatwright Highway
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9
Take the exit slight right toward North Main Street, Walnut Creek
1287 ft · 31 sec
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10
Keep slight right to continue on North Main Street South
1847 ft · 45 sec
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11
Turn straight onto North Main Street
2109 ft · 48 sec · North Main Street
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12
Keep slight left to continue on North Main Street
1278 ft · 40 sec · North Main Street
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13
Arrive at your destination
0 m · 1 sec · North Main Street
Car Route Details
A richer read on the saved driving route between Diamond and Walnut Creek.
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.
CA 4 West
Merge slight left
7.05 mi · 00h 08m
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 Diamond and Mostly Sunny near Walnut Creek.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Diamond to Walnut Creek?
The road trip is about 16.3 miles (26.2 km) and usually takes 00h 18m 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?
Concord is a useful midpoint, sitting about 8.1 miles from Diamond and 8.1 miles from Walnut Creek.
How much longer is the road route than the straight-line distance?
The direct path is about 12.3 miles (19.8 km), while the road route adds roughly 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 7:52 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.29 one way or $6.58 round trip. Estimated CO2 is about 5.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Diamond and Mostly Sunny near Walnut Creek.
Stop Ideas Near Concord
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Concord.
Martinez station
Antioch–Pittsburg
Marine World (Seasonal), Vallejo, California
Vallejo, California
Flight Path Map
This map shows the direct air route between Diamond and Walnut Creek. Straight-line distance: 12.28 mi (19.77 km).
#1 Diamond
Diamond is a place in California, United States.
| Population | 0 |
| Coordinates | 38.0215900, -121.8932900 |
| Altitude | 13 |
| Country | United States |
#2 Walnut Creek
The fifth most populous city in Contra Costa County, California.
| Population | 69,936 |
| Coordinates | 37.9063100, -122.0649600 |
| Altitude | 52 |
| Country | United States |
End: North Main Street (-122.064521, 37.906436)
Estimated Travel Time
Distance: 26 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 32m |
| 40 mph (64.37 km/h) | 00h 24m |
| 50 mph (80.47 km/h) | 00h 19m |
| 60 mph (96.56 km/h) | 00h 16m |
| 70 mph (112.65 km/h) | 00h 13m |
| 80 mph (129 km/h) | 00h 12m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $3.29 | $6.58 |
| Mid-grade | $6.07 | $3.46 | $6.92 |
| Premium | $6.24 | $3.56 | $7.12 |
| Diesel | $7.57 | $4.31 | $8.63 |
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.