Traveling from San Ramon to Fontana covers 398.5 miles and typically takes about 7 hours and 23 minutes. Because this is a highway-focused drive, you can realistically complete the journey in a single day. Budget approximately $92 for fuel to cover the distance between these two Pacific Coast locations. While the route is straightforward, the long duration suggests you should plan for at least two stops to stay refreshed. Whether you are heading south for business or a visit, this trip is best viewed as a direct transit rather than a leisurely sightseeing excursion.
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
199.2 miles from San Ramon, CA
A natural place for your longest stop of the day
, about 3h 37m into the drive
.
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
Arthur H. Breed Junior Freeway
19.2 mi
22m
William Elton Brown Freeway
17 mi
18m
Donald D Doyle Highway
5 mi
5m
Sierra Avenue
3 mi
4m
Golden State Freeway
2 mi
2m
Longest stretch:
Westside Freeway
— 224.4 mi, about 4h
Traffic on I-5
Hour-of-day weekday pattern from 162 FHWA count stations on your route.
Peak
2 PM
~1,500 veh/hr typical
· worst 2,272
Quietest
2 AM
~312 veh/hr
Peak-to-quiet ratio
4.8×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 44 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between San Ramon, CA and Fontana, CA.
1
Start on San Ramon Valley Boulevard
0.3 mi·35 sec·San Ramon Valley Boulevard
2
Turn left onto Crow Canyon Road
321 ft·12 sec·Crow Canyon Road
Use the left lane.
3
Take the ramp
0.3 mi·42 sec
Toward I 680 South: San JoseUse the right lane.
4
Merge onto I 680
5.0 mi·5 min·Donald D Doyle Highway
Use the straight / slight right lanes.
5
Take the exit
0.3 mi·33 sec
Exit 30AToward I 580 East: Livermore, StocktonUse the straight / slight right lanes.
6
Keep slight left at fork
0.7 mi·1 min
Toward I 580 East: Livermore, StocktonUse the straight / slight right lanes.
7
Keep slight left at fork
0.3 mi·38 sec
Toward I 580: StocktonUse the straight / slight right lanes.
8
Merge onto I 580
1.4 mi·1 min·Arthur H. Breed Junior Freeway
9
Keep slight right at fork onto I 580
18 mi·20 min·Arthur H. Breed Junior Freeway
Use the straight / slight right lanes.
10
Keep slight right at fork onto I 580
11 mi·11 min·William Elton Brown Freeway
11
Keep slight left at fork onto I 580
5.9 mi·6 min·William Elton Brown Freeway
12
Merge onto I 5
224 mi·4 hr·Westside Freeway
Use the straight / slight right lanes.
13
Keep slight right at fork onto I 5 Truck
58 mi·1 hr 6 min·I 5 Truck
Use the straight / slight right lanes.
14
Keep slight left at fork onto I 5
2.0 mi·2 min·Golden State Freeway
Use the straight / slight right lanes.
15
Take the exit
0.3 mi·17 sec
Exit 161AToward I 210 East: PasadenaUse the slight right lane.
16
Continue on I 210
24 mi·28 min·Foothill Freeway
Use the straight / slight right lanes.
17
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.
18
Keep slight right at fork onto I 210
2.9 mi·3 min·Foothill Freeway
Use the straight / slight right lanes.
19
Keep slight right at fork onto CA 210
1.4 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
20
Keep slight right at fork onto CA 210
1.2 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
21
Keep slight right at fork onto CA 210
1.8 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
22
Keep slight right at fork onto CA 210
16 mi·18 min·Foothill Freeway
Use the straight / slight right lanes.
23
Take the exit
0.3 mi·46 sec
Exit 67Toward Sierra AvenueUse the straight / slight right lanes.
24
Turn right onto Sierra Avenue
3.0 mi·4 min·Sierra Avenue
Use the left / right lanes.
25
Turn left onto Merrill Avenue
205 ft·4 sec·Merrill Avenue
Use the left lane.
26
Arrive at destination
Merrill Avenue
Trip Plan
To keep your drive manageable, plan to break up the 398.5-mile journey with two planned stops to avoid fatigue during the long stretches. Since the route relies heavily on major freeways, check local traffic reports before departing San Ramon to avoid congestion on key arteries. Given the $92 fuel estimate, consider topping off your tank before hitting the longest 224.4-mile stretch to ensure you aren't forced to stop at premium-priced stations along the freeway. If you find the 7-hour and 23-minute duration too draining, remember that the highway-centric design makes it easy to adjust your pace as needed.
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 199.2 miles from San Ramon, CA, or about 3h 37m 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 88 miles or 1h 38m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 199.2 miles or 3h 37m 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 12m
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 San Ramon, 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 San Ramon, CA
This is one driving day of about 398.5 miles and 7h 23m.
Your first comfortable stop window is around 88 miles from San Ramon, 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.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 23
5 decision points cluster between mile 5.7 and 352.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
5.7 mi into trip|~7m in
Take the exit toward I 580 East: Livermore, Stockton
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 30A
Toward I 580 East: Livermore, Stockton
8
6 mi into trip|~7m in
Keep slight left at fork toward I 580 East: Livermore, Stockton
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 580 East: Livermore, Stockton
7
6.7 mi into trip|~9m in
Keep slight left at fork toward I 580: Stockton
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 580: Stockton
7
327.9 mi into trip|~6h 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
352.6 mi into trip|~6h 28m 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,...
Fuel & Cost
Regular Gas
$83.37 one way
$166.74 round trip
$5.31/gal25.4 MPG avg139 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.52
$86.59
$173.17
premium
$5.67
$88.88
$177.76
diesel
$4.80
$75.24
$150.49
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$83
Meals
$25–$50
Total
$108–$133
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 139.4 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $42 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
119.6
1
$41.84
$19.13
Efficient EV
99.6
1
$34.87
$15.94
EV Truck/SUV
159.4
1
$55.79
$25.50
Gas CO2
139 kg
EV CO2
47 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 Jul 17, 2026
Origin
San Ramon, CA
Evening
in San Ramon on Monday
Local time
7:54 PM
PDT
Current temp
53°F
Partly Cloudy
SW 7 to 10 mph3% chanceLive forecast
Heat Advisory
Heat Advisory issued July 16 at 12:00PM PDT until July 16 at 11:00PM PDT by NWS Hanford CA
Red Flag Warning
Red Flag Warning issued July 16 at 11:39AM PDT until July 17 at 8:00PM PDT by NWS Medford OR
Destination
Fontana, CA
Evening
in Fontana on Monday
Local time
7:54 PM
PDT
Current temp
67°F
Mostly Clear
SW 0 to 10 mph3% chanceLive forecast
Heat Advisory
Heat Advisory issued July 16 at 12:00PM PDT until July 16 at 11:00PM PDT by NWS Hanford CA
Red Flag Warning
Red Flag Warning issued July 16 at 11:39AM PDT until July 17 at 8:00PM PDT by NWS Medford OR
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.
Temperature spread
14 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
7h 23m 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.
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...
Rosie the Riveter WWII Home Front National Historical Park
National Historical Park
Celebrate and honor the contributions and sacrifices of American civilians on the WWII home front. Discover how diverse communities lived, worked, and interacted. Many faces, many stories, many truths...
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...
23 mi from route
~58 min detour
Free
near mile 329.8
Established in 1988, San Francisco Maritime National Historical Park celebrates America’s maritime heritage on the Pacific Coast. Our 50-acre park has grown around Aquatic Park Cove, a protected area...
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...
28 mi from route
~71 min detour
Free
near mile 261.1
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a high-speed experience, as 97% of your travel takes place on major highways. You will spend the bulk of your time on the Westside Freeway and the Foothill Freeway, with a significant segment utilizing the I-5 Truck route. The most taxing part of the journey is a 224.4-mile uninterrupted stretch on the Westside Freeway, which demands steady focus. Because the road is almost entirely interstate-based, the character of the drive is consistent and efficient, prioritizing speed over technical or winding mountain roads.
97% highway — fuel and pacing are the main things to plan.
26 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 224.4 mi on Westside Freeway.
How Hard Is This Drive?
9/10
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 around 5.7 miles in.
Driving Effort9/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 23 significant decision points across 398.5 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: at 5.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 6 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 6.7 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Elevation Profile
High-altitude sections with notable climbs
4,115 ft231 ft
Total Climb
5,262 ft
Total Descent
4,520 ft
Highest Point
4,115 ft
~284.6 mi in
Elevation Range
3,883 ft
Notable High Points
4,115 ft at ~284.6 miles+2,926 ft prominence
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 San Ramon, CA to Fontana, CA, road signs begin pointing toward Ventura along the way.
Doable as a same-day drive at 7h 23m. Total distance: 398.5 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 23m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 224.4 miles on Westside Freeway. The full list of main roads is in the Roads section above.
Yes — we found about 34 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Fontana, CA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. There are 34 rest areas along the route for bathroom stops.
The main spots that need attention: at 5.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 6 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 6.7 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Port Chicago Naval Magazine National Memorial, Rosie the Riveter WWII Home Front National Historical Park and Santa Monica Mountains National Recreation Area (5 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 7.4 hours each way, a round trip means 14.8 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Fontana, CA before the return drive.
