Brentwood, CA to Fontana, CA is 389.2 miles and takes about 7h 20m via Westside Freeway and Foothill Freeway, with a fuel budget near $53 and enough daylight to finish in a day. This trip covers a significant portion of California, moving from the Pacific Coast region inland. It's a highway-focused drive, so expect consistent speeds and a focus on covering ground efficiently. With only 2 recommended stops and a driving time under 8 hours, it's a very manageable one-day journey. Plan for a straightforward trip that gets you from point A to point B with minimal fuss.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
194.6 miles from Brentwood, CA
A natural place for your longest stop of the day
, about 3h 39m into the drive
.
Brentwood is an affluent, suburban city in eastern Contra Costa County, California with a popular downtown for visitors coming from the Sacramento Valley to the county. It serves as one of the eastern gateways to the East Bay, along with Livermore. Many in the city are commuters.
Top landmarks
•Stone House of John Marsh — historic stone house in Contra Costa County, California
Doable as a same-day drive at 7h 20m. Total distance: 389.2 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 20m drive, plan rest stops for pacing.
Drive Character
This route is predominantly a highway-focused drive, with 95% of the journey on major freeways. You'll spend most of your time on the Westside Freeway and Foothill Freeway, offering a consistent driving experience. The longest uninterrupted stretch is a significant 224.4 miles on the Westside Freeway, meaning you can settle in for a long period of steady travel. While the landscape will change as you move across California, the character of the drive remains largely that of a high-speed, efficient transit route designed for covering distance.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 29 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Westside Freeway is the longest continuous segment at about 224.4 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on Westside Freeway and Foothill Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes early in the drive near Oak Street.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 21 significant decision points across 389.2 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: near the start (Oak Street): Lane positioning matters here; at 15.2 miles (Mountain House Parkway): Lane positioning matters here; at 318.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Critical Maneuvers
5 of 21 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
7
0 mi into trip|~0m in|Oak Street
Turn left onto Oak Street
Lane positioning matters here
Use the left lane.
6
15.2 mi into trip|~23m in|Mountain House Parkway
Turn right onto Mountain House Parkway
Lane positioning matters here
Use the slight left lane.
7
318.6 mi into trip|~5h 56m in
Take the exit toward I 210 East: Pasadena
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 161A
Toward I 210 East: Pasadena
8
343.3 mi into trip|~6h 25m in|I 210 / Foothill Freeway
Keep slight right at fork onto I 210 / Foothill Freeway toward CA 134 West, I 210 East: San Bernardino, Ventura
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward CA 134 West, I 210 East: San Bernardino,...
7
385.8 mi into trip|~7h 14m in
Take the exit toward Sierra Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 67
Toward Sierra Avenue
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Brentwood, CA to Fontana, CA, road signs begin pointing toward Ventura along the way.
Ventura
343.3 mi in|~6h 25m|via I 210
Main Roads
Road
Distance
Duration
Westside Freeway
224.4 mi
4h
Foothill Freeway
67 mi
1h 17m
I 5 Truck
58.4 mi
1h 6m
William Elton Brown Freeway
14 mi
15m
Byron Highway
8.1 mi
12m
Brentwood Boulevard
3.7 mi
5m
Mountain House Parkway
3.4 mi
6m
Sierra Avenue
3 mi
4m
Longest stretch:
Westside Freeway
— 224.4 mi, about 4h
Turn-by-Turn Driving Directions
Step-by-step road directions between Brentwood, CA and Fontana, CA.
1
Start on Brentwood Boulevard
66 ft·8 sec·Brentwood Boulevard
2
Turn left onto Oak Street
97 ft·9 sec·Oak Street
Use the left lane.
3
Turn left
305 ft·23 sec
4
Turn right onto Brentwood Boulevard
3.7 mi·5 min·Brentwood Boulevard
5
Continue on Byron Highway
1.4 mi·2 min·Byron Highway
Use the straight lane.
6
Turn right onto J4
6.7 mi·10 min·Byron Highway
7
Continue on J4
1.5 mi·2 min·Byron-Bethany Road
8
Continue on J4
1.8 mi·2 min·Byron Road
9
Turn right onto Mountain House Parkway
2.7 mi·4 min·Mountain House Parkway
Use the slight left lane.
10
Continue on International Parkway
1.0 mi·1 min·International Parkway
Use the straight lane.
11
Continue on Mountain House Parkway
0.8 mi·1 min·Mountain House Parkway
Use the straight lane.
12
Take the ramp
0.2 mi·30 sec
13
Merge onto I 580
8.1 mi·8 min·William Elton Brown Freeway
14
Keep slight left at fork onto I 580
5.9 mi·6 min·William Elton Brown Freeway
15
Merge onto I 5
224 mi·4 hr·Westside Freeway
Use the straight / slight right lanes.
16
Keep slight right at fork onto I 5 Truck
58 mi·1 hr 6 min·I 5 Truck
Use the straight / slight right lanes.
17
Keep slight left at fork onto I 5
2.0 mi·2 min·Golden State Freeway
Use the straight / slight right lanes.
18
Take the exit
0.3 mi·17 sec
Exit 161AToward I 210 East: PasadenaUse the slight right lane.
19
Continue on I 210
24 mi·28 min·Foothill Freeway
Use the straight / slight right lanes.
20
Keep slight right at fork onto I 210
19 mi·22 min·Foothill Freeway
Toward CA 134 West, I 210 East: San Bernardino, VenturaUse the slight right lane.
21
Keep slight right at fork onto I 210
2.9 mi·3 min·Foothill Freeway
Use the straight / slight right lanes.
22
Keep slight right at fork onto CA 210
1.4 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
23
Keep slight right at fork onto CA 210
1.2 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
24
Keep slight right at fork onto CA 210
1.8 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
25
Keep slight right at fork onto CA 210
16 mi·18 min·Foothill Freeway
Use the straight / slight right lanes.
26
Take the exit
0.3 mi·46 sec
Exit 67Toward Sierra AvenueUse the straight / slight right lanes.
27
Turn right onto Sierra Avenue
3.0 mi·4 min·Sierra Avenue
Use the left / right lanes.
28
Turn left onto Merrill Avenue
205 ft·4 sec·Merrill Avenue
Use the left lane.
29
Arrive at destination
Merrill Avenue
Trip Plan
Given the 7h 20m estimated duration, starting your drive from Brentwood early in the morning is advisable to make the most of daylight. With only 2 stops recommended, you can plan them strategically to break up the 389.2 miles. Keep an eye on your fuel, as the longest stretch is over 200 miles; ensure you refuel before hitting that segment if needed. The $53 fuel cost estimate is helpful for budgeting, and since this is a single-day trip, you have the flexibility to adjust your stop times based on your needs. A practical tip for this drive is to be aware of potential traffic around major metropolitan areas, especially if your travel time overlaps with peak commute hours.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 194.6 miles from Brentwood, CA, or about 3h 39m into the drive.
The longest continuous stretch on this route runs about 224.4 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 86 miles or 1h 43m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 194.6 miles or 3h 39m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 6h 9m
Traffic, exits, and arrival timing usually matter more near Fontana, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Brentwood, CA so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Brentwood, CA
This is one driving day of about 389.2 miles and 7h 20m.
Your first comfortable stop window is around 86 miles from Brentwood, CA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on Westside Freeway for about 224.4 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 194.6 mi from Brentwood, CA
· 3h 39m into the drive
The midpoint is around 194.6 miles from Brentwood, CA, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before Westside Freeway if your tank is already low. That segment runs about 224.4 miles.
Arriving in Fontana, CA
The final approach into Fontana, CA usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Fontana, CA.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
Port Chicago Naval Magazine National Memorial
National Memorial
On July 17, 1944, a massive explosion jolted the San Francisco East Bay area, shattering windows and lighting up the night sky. At Port Chicago Naval Magazine, 320 men were killed instantly when two s...
The Santa Monica Mountains offer easy access to surprisingly wild places. Experience the famous beaches of Malibu or explore more than 500 miles of trails. The park abounds with historical and cultura...
24 mi from route
~60 min detour
Free
near mile 322.1
Yes, we can! Widely recognized as the most important Latino leader in the United States during the twentieth century, Cesar Chavez led farm workers and supporters in the establishment of the country's...
27 mi from route
~68 min detour
Free
near mile 255
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $41 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
116.8
1
$40.87
$18.68
Efficient EV
97.3
1
$34.06
$15.57
EV Truck/SUV
155.7
1
$54.49
$24.91
Gas CO2
136 kg
EV CO2
46 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Brentwood, CA
Late night
in Brentwood on Saturday
Local time
5:10 AM
PDT
Current temp
--
Unavailable
Destination
Fontana, CA
Late night
in Fontana on Saturday
Local time
5:10 AM
PDT
Current temp
76°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Road read
7h 20m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Brentwood, CA to Fontana, CA covers 389.2 miles and takes about 7h 20m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Westside Freeway, Foothill Freeway, I 5 Truck. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 194.6 miles from Brentwood, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $52.86 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 2 meaningful breaks for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 21 significant decision points across 389.2 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: near the start (Oak Street): Lane positioning matters here; at 15.2 miles (Mountain House Parkway): Lane positioning matters here; at 318.6 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
On the drive from Brentwood, CA to Fontana, CA, road signs begin pointing toward Ventura along the way.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
