Thermalito, CA to Riverside, CA is 502.8 miles and takes about 9h 29m via Westside Freeway, I 5 Truck, and CA 70, with a fuel budget near $114 and enough daylight to finish in a day. This is a long-haul drive that spans the Pacific Coast region of California, taking you from north of Sacramento down to the Inland Empire. Given the 9.5-hour estimated drive time, it's recommended to split this trip over two days to avoid fatigue. You'll be spending most of your time on major highways, so expect consistent travel speeds.
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
251.4 miles from Thermalito, CA
A natural place for your longest stop of the day
, about 4h 41m into the drive
.
Main Roads
Road
Distance
Duration
Westside Freeway
303.7 mi
5h 28m
I 5 Truck
58.4 mi
1h 6m
CA 70
44.4 mi
52m
Foothill Freeway
44 mi
50m
Pomona Freeway
12 mi
13m
Golden State Highway
7.7 mi
8m
Van Buren Boulevard
6.1 mi
8m
Bernie Richter Memorial Highway
4.9 mi
5m
Longest stretch:
Westside Freeway
— 303.7 mi, about 5h 28m
Traffic on I-5
Hour-of-day weekday pattern from 206 FHWA count stations on your route.
Peak
3 PM
~3,871 veh/hr typical
· worst 5,154
Quietest
2 AM
~553 veh/hr
Peak-to-quiet ratio
7×
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 Thermalito, CA and Riverside, CA.
1
Start on 10th Street
0.2 mi·41 sec·10th Street
2
Turn right onto Grand Avenue
0.8 mi·1 min·Grand Avenue
3
Take the ramp
0.2 mi·13 sec
4
Merge onto CA 70
14 mi·16 min·CA 70
Use the straight lane.
5
Continue on CA 70
11 mi·12 min·CA 70
6
Continue on CA 70
1.5 mi·3 min·CA 70
Use the straight lane.
7
Turn right onto 5th Street
0.2 mi·31 sec·5th Street
8
Turn left onto CA 70
4.2 mi·5 min·E Street
9
Keep slight right at fork onto CA 70
18 mi·20 min·CA 70
Use the straight / slight right lanes.
10
Merge onto CA 99
4.9 mi·5 min·Bernie Richter Memorial Highway
11
Continue on CA 99
7.7 mi·8 min·Golden State Highway
Use the straight / slight right lanes.
12
Merge onto I 5
66 mi·1 hr 13 min·Westside Freeway
Use the straight / slight right lanes.
13
Keep slight left at fork onto I 5
0.8 mi·48 sec·Westside Freeway
14
Keep slight left at fork onto I 5
237 mi·4 hr 13 min·Westside Freeway
Use the straight / slight right lanes.
15
Keep slight right at fork onto I 5 Truck
58 mi·1 hr 6 min·I 5 Truck
Use the straight / slight right lanes.
16
Keep slight left at fork onto I 5
2.0 mi·2 min·Golden State Freeway
Use the straight / slight right lanes.
17
Take the exit
0.3 mi·17 sec
Exit 161AToward I 210 East: PasadenaUse the slight right lane.
18
Continue on I 210
24 mi·28 min·Foothill Freeway
Use the straight / slight right lanes.
19
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.
20
Keep slight right at fork onto I 210
0.5 mi·32 sec·Foothill Freeway
21
Take the exit
0.9 mi·1 min
Exit 44AToward CA 57 South: Santa AnaUse the slight right lane.
22
Continue on CA 57
3.2 mi·3 min·Orange Freeway
Use the straight / slight right lanes.
23
Take the exit
1.1 mi·2 min
Exit 22CToward CA 71: CoronaUse the slight right lane.
24
Continue on CA 71
3.1 mi·3 min·Chino Valley Freeway
Use the straight / slight right lanes.
25
Take the exit
1.4 mi·2 min
Toward CA 60 East: RiversideUse the slight right lane.
26
Merge onto CA 60
12 mi·13 min·Pomona Freeway
Use the straight / slight right lanes.
27
Take the exit
0.5 mi·1 min
Exit 42Toward Van Buren Boulevard, Etiwanda AvenueUse the straight / slight right lanes.
28
Turn straight onto Mission Boulevard
0.2 mi·15 sec·Mission Boulevard
29
Continue on Van Buren Boulevard
6.1 mi·8 min·Van Buren Boulevard
Use the straight lane.
30
Turn left onto Central Avenue
3.6 mi·6 min·Central Avenue
Use the left lane.
31
Turn sharp right
171 ft·12 sec
32
Arrive at destination
Trip Plan
For this 502.8-mile drive, planning for two days is the most sensible approach. Consider departing early in the morning on your first day to cover about half the distance, aiming for a stop around the 250-mile mark. This allows for a more relaxed pace and ensures you're not pushing too hard on day one. Keep an eye on your fuel gauge, especially during the 303.7-mile stretch on the Westside Freeway, as services can sometimes be spaced out on long highway segments. Having your fuel budget of around $114 accounted for will help manage expenses.
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 251.4 miles from Thermalito, CA, or about 4h 41m into the drive.
The longest continuous stretch on this route runs about 303.7 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 111 miles or 2h 9m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 251.4 miles or 4h 41m 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 251.4 miles or 4h 41m
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 8h 12m
Traffic, exits, and arrival timing usually matter more near Riverside, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Thermalito, 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 Thermalito, CA
Aim for roughly 251 miles and 4.7 hours of wheel time on this day.
Day 2
Finish the approach into Riverside, CA
Aim for roughly 251 miles and 4.7 hours of wheel time on this day.
Your first comfortable stop window is around 111 miles from Thermalito, 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 303.7 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 21
5 decision points cluster between mile 426.7 and 492.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
426.7 mi into trip|~7h 53m 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
451.4 mi into trip|~8h 22m 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
470.9 mi into trip|~8h 44m in
Take the exit toward CA 57 South: Santa Ana
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 44A
Toward CA 57 South: Santa Ana
7
475 mi into trip|~8h 50m in
Take the exit toward CA 71: Corona
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 22C
Toward CA 71: Corona
8
492.5 mi into trip|~9h 13m in
Take the exit toward Van Buren Boulevard, Etiwanda Avenue
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 42
Toward Van Buren Boulevard, Etiwanda Avenue
Fuel & Cost
Regular Gas
$105.19 one way
$210.38 round trip
$5.31/gal25.4 MPG avg176 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.52
$109.25
$218.50
premium
$5.67
$112.14
$224.28
diesel
$4.80
$94.94
$189.88
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$105
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$235–$345
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 175.9 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $53 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
150.8
1
$52.79
$24.13
Efficient EV
125.7
1
$44.00
$20.11
EV Truck/SUV
201.1
2
$70.39
$32.18
Gas CO2
176 kg
EV CO2
59 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 16, 2026
Origin
Thermalito, CA
Late night
in Thermalito on Sunday
Local time
5:45 AM
PDT
Current temp
98°F
Sunny
S 7 mph0% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 16 at 3:22PM PDT by NWS San Diego CA
Extreme Heat Warning
Extreme Heat Warning issued July 16 at 1:29PM PDT until July 16 at 8:00PM PDT by NWS San Diego CA
Destination
Riverside, CA
Late night
in Riverside on Sunday
Local time
5:45 AM
PDT
Current temp
99°F
Sunny
W 10 to 15 mph3% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 16 at 3:22PM PDT by NWS San Diego CA
Extreme Heat Warning
Extreme Heat Warning issued July 16 at 1:29PM PDT until July 16 at 8:00PM PDT by NWS San Diego CA
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
1 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
9h 29m 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.
Santa Monica Mountains National Recreation Area
National Recreation Area
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...
25 mi from route
~62 min detour
Free
near mile 433.5
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 364.1
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This trip features a substantial 94% highway share, meaning you'll be on freeways for the vast majority of your 502.8-mile drive. The longest continuous stretch on a single highway is 303.7 miles along the Westside Freeway. Expect minimal time on surface roads, likely occurring towards the beginning or end of your trip as you enter or exit the highway systems. The majority of the drive will involve consistent cruising speeds on major interstates.
94% highway — fuel and pacing are the main things to plan.
32 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 303.7 mi on Westside Freeway.
How Hard Is This Drive?
10/10
This is a straightforward highway drive that stays mostly on Westside Freeway and I 5 Truck. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 426.7 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 21 significant decision points across 502.8 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 426.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 451.4 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 470.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Elevation Profile
Hilly terrain with moderate elevation changes
2,853 ft26 ft
Total Climb
3,487 ft
Total Descent
2,885 ft
Highest Point
2,853 ft
~395.1 mi in
Elevation Range
2,827 ft
Notable High Points
2,853 ft at ~395.1 miles+1,564 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 Thermalito, CA to Riverside, CA, road signs begin pointing toward Ventura along the way.
Riverside is a city in Riverside County in California. With a population of over 300,000, the city plays host to a diverse cross-section of people and has a rich history. Riverside is approximately 55 miles east of downtown Los Angeles. It is a center for higher education, with one community college, a large state university, and two private universities. A hub of regional commerce and transportation, it is a city with an intriguing past and a promising future, and is worth a visit.
Top landmarks
•Mission Inn — hotel in Riverside, California
•Universalist Unitarian Church of Riverside — church building in Riverside, California, USA
•First Congregational Church of Riverside — church building in Riverside, California, United States of America
The longest stretch is about 303.7 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 251 miles on day one.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
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 Riverside, 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. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 426.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 451.4 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 470.9 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Yes — Santa Monica Mountains National Recreation Area and César E. Chávez National Monument. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 9.5 hours each way, a round trip means 19.0 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Riverside, CA before the return drive.
