Mill Valley to Fontana is 440.4 miles and takes about 8h 16m via Westside Freeway, Foothill Freeway, and I 5 Truck, with a fuel budget near $101 and enough daylight to finish in a day if you leave early. This route stays within California, connecting the Pacific Coast region from north to south. Given the predominantly highway profile, it’s a trip best suited for those prioritizing efficient travel. With two recommended stops, you can break up the drive comfortably over two days, or push through in one if you're up for a long haul.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
220.2 miles from Mill Valley, CA
A natural place for your longest stop of the day
, about 4h 8m 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
29.3 mi
33m
William Elton Brown Freeway
17 mi
18m
MacArthur Freeway
16.4 mi
18m
John T. Knox Freeway
11.6 mi
14m
Eastshore Freeway
3.8 mi
4m
Longest stretch:
Westside Freeway
— 224.4 mi, about 4h
Turn-by-Turn Driving Directions
Step-by-step road directions between Mill Valley, CA and Fontana, CA.
1
Start on Sunnyside Avenue
250 ft·10 sec·Sunnyside Avenue
2
Turn right onto Hill Street
295 ft·10 sec·Hill Street
3
Turn left onto East Blithedale Avenue
1.8 mi·4 min·East Blithedale Avenue
Use the left / straight lanes.
4
Take the ramp
0.2 mi·20 sec
Toward US 101 North: EurekaUse the straight / right lanes.
5
Merge onto US 101
2.6 mi·3 min·Redwood Highway
Use the straight / slight right lanes.
6
Take the exit
0.2 mi·20 sec
Exit 450BToward San Anselmo, Richmond BridgeUse the slight right lane.
7
Keep slight right at fork
0.1 mi·17 sec
Toward US 101 North: Richmond BridgeUse the straight / slight right lanes.
8
Turn slight right
268 ft·6 sec
Toward Richmond BridgeUse the slight right lane.
9
Turn straight onto Sir Francis Drake Boulevard East
1.4 mi·2 min·Sir Francis Drake Boulevard East
Use the left / uturn lanes.
10
Take the ramp
0.3 mi·27 sec
Toward I 580 East
11
Merge onto I 580
12 mi·14 min·John T. Knox Freeway
Use the straight / slight right lanes.
12
Merge onto I 80; I 580
3.8 mi·4 min·Eastshore Freeway
Use the straight / slight right lanes.
13
Keep slight left at fork onto I 580
0.3 mi·21 sec·Interstate Highway 80
Toward I 580 East, I 880 South: Downtown Oakland, Hayward, Stockton, Alameda, San JoseUse the straight / slight right lanes.
14
Keep slight left at fork onto I 580
16 mi·18 min·MacArthur Freeway
Toward I 580: Downtown Oakland, Hayward, StocktonUse the slight left / slight right lanes.
15
Merge onto I 580
12 mi·13 min·Arthur H. Breed Junior Freeway
Use the straight / slight right lanes.
16
Keep slight right at fork onto I 580
18 mi·20 min·Arthur H. Breed Junior Freeway
Use the straight / slight right lanes.
17
Keep slight right at fork onto I 580
11 mi·11 min·William Elton Brown Freeway
18
Keep slight left at fork onto I 580
5.9 mi·6 min·William Elton Brown Freeway
19
Merge onto I 5
224 mi·4 hr·Westside Freeway
Use the straight / slight right lanes.
20
Keep slight right at fork onto I 5 Truck
58 mi·1 hr 6 min·I 5 Truck
Use the straight / slight right lanes.
21
Keep slight left at fork onto I 5
2.0 mi·2 min·Golden State Freeway
Use the straight / slight right lanes.
22
Take the exit
0.3 mi·17 sec
Exit 161AToward I 210 East: PasadenaUse the slight right lane.
23
Continue on I 210
24 mi·28 min·Foothill Freeway
Use the straight / slight right lanes.
24
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.
25
Keep slight right at fork onto I 210
2.9 mi·3 min·Foothill Freeway
Use the straight / slight right lanes.
26
Keep slight right at fork onto CA 210
1.4 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
27
Keep slight right at fork onto CA 210
1.2 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
28
Keep slight right at fork onto CA 210
1.8 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
29
Keep slight right at fork onto CA 210
16 mi·18 min·Foothill Freeway
Use the straight / slight right lanes.
30
Take the exit
0.3 mi·46 sec
Exit 67Toward Sierra AvenueUse the straight / slight right lanes.
31
Turn right onto Sierra Avenue
3.0 mi·4 min·Sierra Avenue
Use the left / right lanes.
32
Turn left onto Merrill Avenue
205 ft·4 sec·Merrill Avenue
Use the left lane.
33
Arrive at destination
Merrill Avenue
Trip Plan
To make the most of this 8-hour drive, consider leaving Mill Valley early to avoid morning traffic. You have the flexibility to complete this trip in one day, but splitting it over two days with two stops is recommended for a more relaxed pace. The longest continuous driving segment is over 224 miles, so plan your breaks accordingly. Keep an eye on your fuel levels, especially as you transition onto the I 5 Truck route, and budget around $101 for gas.
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.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 220.2 miles from Mill Valley, CA, or about 4h 8m into the drive.
The longest continuous stretch on this route runs about 224.4 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 97 miles or 1h 55m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 220.2 miles or 4h 8m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 220.2 miles or 4h 8m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 7h 5m
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 Mill Valley, 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.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from Mill Valley, CA
Aim for roughly 220 miles and 4.1 hours of wheel time on this day.
Day 2
Finish the approach into Fontana, CA
Aim for roughly 220 miles and 4.1 hours of wheel time on this day.
Your first comfortable stop window is around 97 miles from Mill Valley, CA.
This route usually feels better as a 2-day drive than as one long push.
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 30
5 decision points cluster between mile 4.7 and 394.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
4.7 mi into trip|~8m in
Take the exit toward San Anselmo, Richmond Bridge
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 450B
Toward San Anselmo, Richmond Bridge
8
4.9 mi into trip|~9m in
Keep slight right at fork toward US 101 North: Richmond Bridge
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward US 101 North: Richmond Bridge
8
22.1 mi into trip|~31m in|I 580 / Interstate Highway 80
Keep slight left at fork onto I 580 / Interstate Highway 80 toward I 580 East, I 880 South: Downtown Oakland, Hayward, Stockton, Alameda, San Jose
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, I 880 South: Downtown Oaklan...
8
22.4 mi into trip|~32m in|I 580 / MacArthur Freeway
Keep slight left at fork onto I 580 / MacArthur Freeway toward I 580: Downtown Oakland, Hayward, Stockton
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / slight right lanes.
Toward I 580: Downtown Oakland, Hayward, Stockt...
8
394.5 mi into trip|~7h 21m 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
$101.22 one way
$202.45 round trip
$5.84/gal25.4 MPG avg154 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$6.02
$104.31
$208.62
premium
$6.18
$107.10
$214.20
diesel
$5.61
$97.23
$194.47
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$101
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$231–$341
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 154.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $46 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
132.1
1
$46.24
$21.14
Efficient EV
110.1
1
$38.54
$17.62
EV Truck/SUV
176.2
2
$61.66
$28.19
Gas CO2
154 kg
EV CO2
52 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 20, 2026
Origin
Mill Valley, CA
Late night
in Mill Valley on Tuesday
Local time
3:48 AM
PDT
Current temp
66°F
Unavailable
Live forecast
Destination
Fontana, CA
Late night
in Fontana on Tuesday
Local time
3:48 AM
PDT
Current temp
69°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.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
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
3 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
8h 16m on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
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.
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...
Walk among old growth coast redwoods, cooling their roots in the fresh water of Redwood Creek and lifting their crowns to reach the sun and fog. Federally protected as a National Monument since 1908,...
Experience a park so rich it supports 19 distinct ecosystems with over 2,000 plant and animal species. Go for a hike, enjoy a vista, have a picnic or learn about the centuries of overlapping history f...
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...
9 mi from route
~22 min detour
Free
near mile 15.2
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...
19 mi from route
~48 min detour
Free
near mile 15.2
From its thunderous ocean breakers crashing against rocky headlands and expansive sand beaches to its open grasslands, brushy hillsides, and forested ridges, Point Reyes offers visitors over 1500 spec...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is almost entirely on highways, with a 98% highway share. You'll encounter the longest stretch, 224.4 miles, on the Westside Freeway. Expect a fairly continuous highway experience until the very end of your trip. The constant highway travel means you'll likely notice a high volume of exits and merging traffic as you approach and move through populated areas.
98% highway — fuel and pacing are the main things to plan.
33 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?
10/10
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 4.7 miles in.
Driving Effort10/10
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 30 significant decision points across 440.4 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 4.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 4.9 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 22.1 miles (I 580 / Interstate Highway 80): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Mill Valley, CA and Fontana, CA, road signs point toward Hayward, Stockton, Alameda, San Jose and Ventura.
The longest stretch is about 224.4 miles on Westside Freeway. The full list of main roads is in the Roads section above.
Yes — a 2-day pace is more comfortable than one long haul. A sensible stopping point is after roughly 220 miles on day one.
Yes — we found about 35 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 35 rest areas along the route for bathroom stops.
The main spots that need attention: at 4.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 4.9 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 22.1 miles (I 580 / Interstate Highway 80): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Rosie the Riveter WWII Home Front National Historical Park, Muir Woods National Monument and Golden Gate National Recreation Area (6 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 8.3 hours each way, a round trip means 16.5 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.
