Fontana, CA to Brentwood, CA is 389.3 miles and takes about 7h 19m via Westside Freeway and I 5 Truck, with a fuel budget near $89 and enough daylight to finish in a day. This trip stays within California, connecting the Pacific Coast region on both ends. Expect a straightforward, highway-focused drive with 95% of your journey on major freeways. Given the 7-hour duration, it's a manageable one-day trip, but planning for two stops will help break up the drive and keep you fresh. Consider this route if you prefer efficient travel over winding backroads.
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
194.7 miles from Fontana, CA
A natural place for your longest stop of the day
, about 3h 40m 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 19m. Total distance: 389.3 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 19m drive, plan rest stops for pacing.
Drive Character
This is overwhelmingly a highway-focused drive, with 95% of the 389.3 miles on major freeways like the Westside Freeway and I 5 Truck. You'll experience long, uninterrupted stretches, including a significant 225.6-mile segment on the Westside Freeway. The character of the drive is consistent for the most part, prioritizing speed and directness. While the journey is primarily on high-speed roads, the sheer length of the longest stretch means you'll want to be prepared for extended periods of freeway travel.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 27 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 225.6 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 Sierra Avenue.
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 20 significant decision points across 389.3 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 (Sierra Avenue): Lane positioning matters here; at 18.2 miles (CA 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 19.4 miles (CA 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 20 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
6
0 mi into trip|~0m in|Sierra Avenue
Turn right onto Sierra Avenue
Lane positioning matters here
Use the left / straight lanes.
6
18.2 mi into trip|~22m in|CA 210 / Foothill Freeway
Keep slight right at fork onto CA 210 / Foothill Freeway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
6
19.4 mi into trip|~24m in|CA 210 / Foothill Freeway
Keep slight right at fork onto CA 210 / Foothill Freeway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
8
45 mi into trip|~53m in|I 210 / Foothill Freeway
Keep slight right at fork onto I 210 / Foothill Freeway toward I 210 West: Sacramento
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 26A
Toward I 210 West: Sacramento
7
130.1 mi into trip|~2h 31m in|I 5 / Westside Freeway
Keep slight right at fork onto I 5 / Westside Freeway toward I 5 North
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 5 North
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 Fontana, CA to Brentwood, CA, road signs begin pointing toward San Francisco along the way.
San Francisco
355.7 mi in|~6h 33m|via I 580
Main Roads
Road
Distance
Duration
Westside Freeway
225.6 mi
4h 1m
Foothill Freeway
67.2 mi
1h 17m
I 5 Truck
37.1 mi
42m
Golden State Freeway
22.3 mi
25m
William Elton Brown Freeway
13.9 mi
14m
Byron Highway
6.7 mi
10m
Brentwood Boulevard
3.7 mi
5m
Mountain House Parkway
3.5 mi
6m
Longest stretch:
Westside Freeway
— 225.6 mi, about 4h 1m
Turn-by-Turn Driving Directions
Step-by-step road directions between Fontana, CA and Brentwood, CA.
1
Start on Merrill Avenue
205 ft·6 sec·Merrill Avenue
2
Turn right onto Sierra Avenue
3.0 mi·4 min·Sierra Avenue
Use the left / straight lanes.
3
Take the ramp
0.3 mi·45 sec
Toward CA 210 WestUse the straight / slight right lanes.
4
Merge onto CA 210
15 mi·17 min·Foothill Freeway
Use the straight / slight right lanes.
5
Keep slight right at fork onto CA 210
1.2 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
6
Keep slight right at fork onto CA 210
2.4 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
7
Keep slight right at fork onto CA 210
1.4 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
8
Keep slight right at fork onto CA 210
1.8 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
9
Keep slight right at fork onto CA 210
20 mi·23 min·Foothill Freeway
Use the straight / slight right lanes.
10
Keep slight right at fork onto I 210
26 mi·29 min·Foothill Freeway
Exit 26AToward I 210 West: SacramentoUse the straight / slight right lanes.
11
Keep slight right at fork
0.1 mi·9 sec
Use the slight right lane.
12
Merge onto I 5 Truck
1.0 mi·1 min·I 5 Truck
Exit 161A
13
Keep slight left at fork onto I 5 Truck
36 mi·41 min·I 5 Truck
Use the straight / slight right lanes.
14
Keep slight left at fork onto I 5
22 mi·25 min·Golden State Freeway
Use the straight / slight right lanes.
15
Keep slight right at fork onto I 5
226 mi·4 hr 1 min·Westside Freeway
Toward I 5 NorthUse the straight / slight right lanes.
16
Keep slight left at fork onto I 580
14 mi·14 min·William Elton Brown Freeway
Toward I 580 West: Tracy, San Francisco
17
Take the exit
0.2 mi·22 sec
18
Keep slight right at fork
288 ft·7 sec
Toward Patterson Pass Road
19
Turn straight onto Mountain House Parkway
0.7 mi·1 min·Mountain House Parkway
Use the straight lane.
20
Turn right onto International Parkway
0.8 mi·1 min·International Parkway
21
Continue on Mountain House Parkway
2.8 mi·5 min·Mountain House Parkway
Use the straight lane.
22
At end of road, turn left onto J4
1.8 mi·2 min·Byron Road
Use the slight left lane.
23
Continue on J4
1.5 mi·2 min·Byron-Bethany Road
24
Continue on J4
6.7 mi·10 min·Byron Highway
25
At end of road, turn left onto CA 4
1.4 mi·2 min·CA 4
Use the left / straight lanes.
26
Continue on Brentwood Boulevard
3.7 mi·5 min·Brentwood Boulevard
27
Arrive at destination
Brentwood Boulevard
Trip Plan
Given the 7h 19m estimated drive time and 389.3 miles, leaving Fontana, CA in the morning is your best bet to complete this trip within daylight hours. With two recommended stops, you can comfortably break up the 225.6-mile longest stretch on the Westside Freeway. Keep an eye on your fuel, especially during longer freeway segments, and utilize the designated stops for both rest and refueling. The $89 fuel cost is an estimate, so monitoring gas prices along your route is advisable. This is a drive where efficiency is key, so sticking to the main highways will likely be your fastest option.
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 194.7 miles from Fontana, CA, or about 3h 40m into the drive.
The longest continuous stretch on this route runs about 225.6 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 41m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 194.7 miles or 3h 40m 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 5m
Traffic, exits, and arrival timing usually matter more near Brentwood, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Fontana, 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 Fontana, CA
This is one driving day of about 389.3 miles and 7h 19m.
Your first comfortable stop window is around 86 miles from Fontana, 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 225.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 194.7 mi from Fontana, CA
· 3h 40m into the drive
Place data sourced from public business listings. Hours and availability may vary.
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...
20 mi from route
~50 min detour
Free
near mile 389.3
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
~61 min detour
Free
near mile 67.1
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 134.2
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
$40.88
$18.69
Efficient EV
97.3
1
$34.06
$15.57
EV Truck/SUV
155.7
1
$54.50
$24.92
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 18, 2026
Origin
Fontana, CA
Morning
in Fontana on Saturday
Local time
7:07 AM
PDT
Current temp
53°F
Clear
N 15 mph0% chanceLive forecast
Destination
Brentwood, CA
Morning
in Brentwood on Saturday
Local time
7:07 AM
PDT
Current temp
--
Unavailable
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 19m 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 Fontana, CA to Brentwood, CA covers 389.3 miles and takes about 7h 19m 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 194.7 miles from Fontana, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $89.48 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 20 significant decision points across 389.3 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 (Sierra Avenue): Lane positioning matters here; at 18.2 miles (CA 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 19.4 miles (CA 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here.
On the drive from Fontana, CA to Brentwood, CA, road signs begin pointing toward San Francisco 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, EIA for fuel prices, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
