How far is Fontana, CA from Lake Forest, CA?
The driving distance from Fontana, CA to Lake Forest, CA is about 50 miles (80.5 km), with a travel time of about 01h 05m by car.
- The straight-line flight distance is about 34.1 miles (54.8 km).
- For a round trip, plan for roughly 02h 10m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 01h 05m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
The second most populous city in Riverside County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Fontana and Lake Forest.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fontana and Lake Forest.
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1
Start on Merrill Avenue
63 m · 9 sec · Merrill Avenue
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2
Turn left onto Sierra Avenue
1.6 mi · 3 min · Sierra Avenue
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3
Take the ramp slight right toward I 10 West: Los Angeles
1761 ft · 45 sec
-
4
Merge slight left onto San Bernardino Freeway
5.4 mi · 6 min · San Bernardino Freeway
-
5
Take the exit slight right toward I 15 South, I 15 North: Barstow, San Diego
1390 ft · 34 sec
-
6
Keep slight left to continue on I 15 South: San Diego
1.2 km · 2 min
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7
Merge slight left onto Ontario Freeway
2.8 mi · 3 min · Ontario Freeway
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8
Keep slight right to continue on Ontario Freeway
2066 ft · 27 sec · Ontario Freeway
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9
Continue on Corona Freeway
2.4 mi · 3 min · Corona Freeway
-
10
Take the exit slight right toward Limonite Avenue
1819 ft · 48 sec
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11
Turn right onto Limonite Avenue
2393 ft · 50 sec · Limonite Avenue
-
12
Turn left onto Hamner Avenue
2.6 mi · 5 min · Hamner Avenue
-
13
Turn left onto 6th Street
108 m · 14 sec · 6th Street
-
14
Take the ramp right toward I 15 South: San Diego
1646 ft · 42 sec
-
15
Merge slight left onto Corona Freeway
3.3 mi · 4 min · Corona Freeway
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16
Take the exit slight right toward CA 91 West: Beach Cities
3092 ft · 48 sec
-
17
Continue straight
9.1 mi · 11 min
-
18
Take the exit slight right toward CA 241 South: Irvine
1.2 mi · 1 min
-
19
Continue on Eastern Transportation Corridor
5.7 mi · 7 min · Eastern Transportation Corridor
-
20
Keep slight left to continue on Foothill Transportation Corridor
5.3 mi · 6 min · Foothill Transportation Corridor
-
21
Take the exit slight right toward CA 133 Toll
1 mi · 1 min
-
22
Continue on Eastern Transportation Corridor
2965 ft · 39 sec · Eastern Transportation Corridor
-
23
Take the exit slight right toward Irvine Boulevard
1661 ft · 24 sec
-
24
Turn left onto Irvine Boulevard
3.7 mi · 5 min · Irvine Boulevard
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25
Continue on Trabuco Road
1.1 mi · 2 min · Trabuco Road
-
26
Turn right
805 ft · 59 sec
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27
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Fontana and Lake Forest.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
CA 91 West
Continue straight
9.12 mi · 00h 11m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Fontana and Mostly Sunny near Lake Forest.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fontana to Lake Forest?
The road trip is about 50 miles (80.5 km) and usually takes 01h 05m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Corona is a useful midpoint, sitting about 25 miles from Fontana and 25 miles from Lake Forest.
How much longer is the road route than the straight-line distance?
The direct path is about 34.1 miles (54.8 km), while the road route adds roughly 15.9 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 4:20 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $10.15 one way or $20.31 round trip. Estimated CO2 is about 15.6 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Fontana and Mostly Sunny near Lake Forest.
Stop Ideas Near Corona
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Subway
Embassy Suites by Hilton Anaheim North
City of Riverside
Chino City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Corona.
Riverside–Downtown
Ontario
Moreno Valley, California
Pomona station
Flight Path Map
This map shows the direct air route between Fontana and Lake Forest. Straight-line distance: 34.04 mi (54.79 km).
#1 Fontana
The second most populous city in San Bernardino County, California.
| Population | 216,173 |
| Coordinates | 34.0922300, -117.4350500 |
| Altitude | 377 |
| Country | United States |
#2 Lake Forest
A city in Orange County, California.
| Population | 85,329 |
| Coordinates | 33.6469700, -117.6892200 |
| Altitude | 148 |
| Country | United States |
End: Lake Forest (-117.68922, 33.64697)
Estimated Travel Time
Distance: 80 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 39m |
| 40 mph (64.37 km/h) | 01h 14m |
| 50 mph (80.47 km/h) | 00h 59m |
| 60 mph (96.56 km/h) | 00h 49m |
| 70 mph (112.65 km/h) | 00h 42m |
| 80 mph (129 km/h) | 00h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $10.15 | $20.31 |
| Mid-grade | $6.07 | $10.68 | $21.35 |
| Premium | $6.24 | $10.99 | $21.98 |
| Diesel | $7.57 | $13.32 | $26.64 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in California · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.