How far is Diamond Bar, CA from Riverside, CA?
The driving distance from Diamond Bar, CA to Riverside, CA is about 31.1 miles (50 km), with a travel time of about 00h 38m by car.
- The straight-line flight distance is about 24.3 miles (39.1 km).
- For a round trip, plan for roughly 01h 16m 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 38m.
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 second most populous city in San Bernardino County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Diamond Bar and Riverside.
Turn-by-Turn Driving Directions
Step-by-step road directions between Diamond Bar and Riverside.
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1
Start on the route
12 m · 5 sec
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2
At the end of the road, turn right onto Sunset Crossing Road
32 m · 12 sec · Sunset Crossing Road
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3
Turn left onto North Diamond Bar Boulevard
2228 ft · 56 sec · North Diamond Bar Boulevard
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4
Turn left onto CA 60 East: Pomona
1709 ft · 48 sec
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5
Merge slight left onto Pomona Freeway
15.9 mi · 18 min · Pomona Freeway
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6
Take the exit slight right toward Van Buren Boulevard, Etiwanda Avenue
2448 ft · 1 min
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7
Turn straight onto Mission Boulevard
852 ft · 15 sec · Mission Boulevard
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8
Continue on Van Buren Boulevard
6.1 mi · 9 min · Van Buren Boulevard
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9
Turn left onto Central Avenue
3.6 mi · 6 min · Central Avenue
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10
Turn sharp right
52 m · 13 sec
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11
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Diamond Bar and Riverside.
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.
Pomona Freeway
Merge slight left onto Pomona Freeway
15.9 mi · 00h 18m
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 Diamond Bar and Mostly Sunny near Riverside.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Diamond Bar to Riverside?
The road trip is about 31.1 miles (50 km) and usually takes 00h 38m 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?
Ontario is a useful midpoint, sitting about 13.5 miles from Diamond Bar and 17.6 miles from Riverside.
How much longer is the road route than the straight-line distance?
The direct path is about 24.3 miles (39.1 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 7:14 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.35 one way or $12.69 round trip. Estimated CO2 is about 9.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Diamond Bar and Mostly Sunny near Riverside.
Stop Ideas Near Ontario
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Brandon's Diner Jr. Of City Hall
Ayres Hotel Chino Hills
City Hall
Chino City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Ontario.
Ontario
Claremont, California
Pomona station
Riverside–Downtown
Flight Path Map
This map shows the direct air route between Diamond Bar and Riverside. Straight-line distance: 24.29 mi (39.09 km).
#1 Diamond Bar
A city in Los Angeles County, California.
| Population | 54,880 |
| Coordinates | 34.0286200, -117.8103400 |
| Altitude | 212 |
| Country | United States |
#2 Riverside
The most populous city in Riverside County, California and the center of the Riverside metropolitan area.
| Population | 330,786 |
| Coordinates | 33.9533500, -117.3961600 |
| Altitude | 252 |
| Country | United States |
End: (-117.396162, 33.953244)
Estimated Travel Time
Distance: 50 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 02m |
| 40 mph (64.37 km/h) | 00h 46m |
| 50 mph (80.47 km/h) | 00h 37m |
| 60 mph (96.56 km/h) | 00h 31m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $6.35 | $12.69 |
| Mid-grade | $6.07 | $6.67 | $13.35 |
| Premium | $6.24 | $6.87 | $13.73 |
| Diesel | $7.57 | $8.32 | $16.65 |
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.