How far is Fremont, CA from Castaic, CA?
The driving distance from Fremont, CA to Castaic, CA is about 316.2 miles (508.8 km), with a travel time of about 05h 57m by car.
- The straight-line flight distance is about 282.9 miles (455.3 km).
- For a round trip, plan for roughly 11h 54m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM PDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 05h 57m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Small city in Fresno County, California
Route Weather Snapshot
Check the forecast at both ends before you head out.
Clear
Driving Route Map
The map below follows the saved road route between Fremont and Castaic.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fremont and Castaic.
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1
Start on Mowry Avenue
33 m · 5 sec · Mowry Avenue
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2
Continue on Mowry Avenue
1.4 mi · 3 min · Mowry Avenue
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3
Continue on Mowry Avenue
1067 ft · 24 sec · Mowry Avenue
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4
Take the ramp slight right toward I 880 South: San Jose
1568 ft · 40 sec
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5
Merge slight left onto Nimitz Freeway
13.3 mi · 15 min · Nimitz Freeway
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6
Take the exit right toward US 101 South: Los Angeles
758 ft · 34 sec
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7
Merge slight left onto Bayshore Freeway
32.3 mi · 37 min · Bayshore Freeway
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8
Take the exit slight right toward CA 152 East: 10th Street, Pacheco Pass Road
1539 ft · 40 sec
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9
Turn left onto East 10th Street
108 m · 13 sec · East 10th Street
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10
Continue on Pacheco Pass Highway
40.6 mi · 50 min · Pacheco Pass Highway
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11
Take the exit slight right toward I 5: Los Angeles
3148 ft · 1 min
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12
Merge slight left onto Westside Freeway
181.1 mi · 3 hr 14 min · Westside Freeway
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13
Keep slight right
44.9 mi · 51 min
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14
Take the exit slight right toward Castaic
1117 ft · 33 sec
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15
Turn left onto The Old Road
3147 ft · 1 min · The Old Road
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16
Turn right onto Parker Road
154 m · 19 sec · Parker Road
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17
Turn left onto Castaic Oak Lane
19 m · 3 sec · Castaic Oak Lane
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18
Arrive at your destination
0 m · 1 sec · Castaic Oak Lane
Car Route Details
A richer read on the saved driving route between Fremont and Castaic.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Westside Freeway
Merge slight left onto Westside Freeway
181 mi · 03h 14m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving Fremont and Clear near Castaic.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fremont to Castaic?
The road trip is about 316.2 miles (508.8 km) and usually takes 05h 57m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Huron is a useful midpoint, sitting about 158.1 miles from Fremont and 158.1 miles from Castaic.
How much longer is the road route than the straight-line distance?
The direct path is about 282.9 miles (455.3 km), while the road route adds roughly 33.3 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 6:00 AM to 8:00 AM PDT. If you want a more comfortable same-day return, try to leave by 5:06 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $69.87 one way or $139.75 round trip. Estimated CO2 is about 99.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Fremont and Clear near Castaic.
Stop Ideas Near Huron
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Huron.
Lemoore (Naval Air Station), California
Kettleman City, California
Lemoore, California
Hanford station
Flight Path Map
This map shows the direct air route between Fremont and Castaic. Straight-line distance: 282.9 mi (455.29 km).
#1 Fremont
The fifth most populous city in California.
| Population | 234,569 |
| Coordinates | 37.5482700, -121.9885700 |
| Altitude | 17 |
| Country | United States |
#2 Castaic
Situated in the northwestern portion of Los Angeles County, this unincorporated area rests at an elevation of 1,227 feet within the rugged terrain of the Sierra Pelona Mountains.
| Population | 0 |
| Coordinates | 34.4888800, -118.6228700 |
| Altitude | 374 |
| Country | United States |
End: Castaic (-118.62287, 34.48888)
Estimated Travel Time
Distance: 509 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 32m |
| 40 mph (64.37 km/h) | 07h 54m |
| 50 mph (80.47 km/h) | 06h 19m |
| 60 mph (96.56 km/h) | 05h 16m |
| 70 mph (112.65 km/h) | 04h 31m |
| 80 mph (129 km/h) | 03h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $6.26 | $69.87 | $139.75 |
| Mid-grade | $6.50 | $72.53 | $145.06 |
| Premium | $6.69 | $74.65 | $149.30 |
| Diesel | $8.41 | $93.89 | $187.78 |
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 · Oct 15, 2026