How far is Walnut Creek, CA from Diamond, CA?
The driving distance from Walnut Creek, CA to Diamond, CA is about 16.3 miles (26.2 km), with a travel time of about 00h 21m by car.
- The straight-line flight distance is about 12.3 miles (19.8 km).
- For a round trip, plan for roughly 00h 42m 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 21m.
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.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Walnut Creek and Diamond.
Turn-by-Turn Driving Directions
Step-by-step road directions between Walnut Creek and Diamond.
-
1
Start on North Main Street
29 m · 5 sec · North Main Street
-
2
Turn right onto Ygnacio Valley Road
142 m · 13 sec · Ygnacio Valley Road
-
3
Turn right onto North California Boulevard
1880 ft · 57 sec · North California Boulevard
-
4
Turn straight onto Lawrence Way
2024 ft · 53 sec · Lawrence Way
-
5
Take the ramp straight toward I 680 North: Sacramento
2581 ft · 1 min
-
6
Merge slight left onto Senator Daniel E Boatwright Highway
2.5 mi · 3 min · Senator Daniel E Boatwright Highway
-
7
Keep slight right to continue on CA 242 North: Concord, Pittsburg
3.9 mi · 4 min
-
8
Merge slight left
7.8 mi · 9 min
-
9
Take the exit slight right toward Railroad Avenue
1282 ft · 19 sec
-
10
Turn left onto Railroad Avenue
1645 ft · 50 sec · Railroad Avenue
-
11
Turn left onto Civic Avenue
1551 ft · 54 sec · Civic Avenue
-
12
Turn left onto Dimaggio Avenue
30 m · 4 sec · Dimaggio Avenue
-
13
Arrive at your destination
0 m · 1 sec · Dimaggio Avenue
Car Route Details
A richer read on the saved driving route between Walnut Creek 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.
CA 242 North
Merge slight left
7.78 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.
Mostly Sunny leaving Walnut Creek and Sunny near Diamond.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Walnut Creek to Diamond?
The road trip is about 16.3 miles (26.2 km) and usually takes 00h 21m 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 Walnut Creek and 8.1 miles from Diamond.
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 7:48 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $3.35 one way or $6.69 round trip. Estimated CO2 is about 5.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Walnut Creek and Sunny near Diamond.
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 Walnut Creek and Diamond. Straight-line distance: 12.28 mi (19.77 km).
#1 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 |
#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: 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 | $3.35 | $6.69 |
| Mid-grade | $6.07 | $3.52 | $7.04 |
| Premium | $6.24 | $3.62 | $7.24 |
| Diesel | $7.57 | $4.39 | $8.78 |
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.