How far is Caldwell, ID from Fremont County, ID?
The driving distance from Caldwell, ID to Fremont County, ID is about 369.9 miles (595.3 km), with a travel time of about 06h 19m by car.
- The straight-line flight distance is about 261.8 miles (421.4 km).
- For a round trip, plan for roughly 12h 38m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
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 06h 19m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
City in Minidoka County, Idaho, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Caldwell and Fremont County.
Turn-by-Turn Driving Directions
Step-by-step road directions between Caldwell and Fremont County.
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1
Start on the route
28 m · 12 sec
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2
Turn left onto Cleveland Boulevard
22 m · 4 sec · Cleveland Boulevard
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3
Turn right
43 m · 13 sec
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4
Turn right
46 m · 13 sec
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5
Turn right onto South 10th Avenue
1.1 km · 2 min · South 10th Avenue
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6
Take the ramp slight right
2822 ft · 1 min
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7
Merge slight left onto Vietnam Veterans Memorial Highway
20.9 mi · 24 min · Vietnam Veterans Memorial Highway
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8
Keep slight right to continue on Vietnam Veterans Memorial Highway
172.3 mi · 2 hr 43 min · Vietnam Veterans Memorial Highway
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9
Continue straight
62.7 mi · 59 min
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10
Keep slight left to continue on Idaho Falls
3046 ft · 40 sec
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11
Merge slight right
46.3 mi · 44 min
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12
Take the exit slight right toward US 20 East, I 15: Rigby, West Yellowstone
1434 ft · 35 sec
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13
Continue on Rigby Highway
3.1 mi · 4 min · Rigby Highway
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14
Continue on Idaho Medal of Honor Highway
15.4 mi · 16 min · Idaho Medal of Honor Highway
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15
Continue on Yellowstone Highway
17.2 mi · 18 min · Yellowstone Highway
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16
Continue on Idaho Medal of Honor Highway
25.5 mi · 29 min · Idaho Medal of Honor Highway
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17
Turn left onto South Antelope Flat Road
4.3 mi · 17 min · South Antelope Flat Road
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18
Arrive at your destination
0 m · 1 sec · South Antelope Flat Road
Car Route Details
A richer read on the saved driving route between Caldwell and Fremont County.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Vietnam Veterans Memorial Highway
Keep slight right to continue on Vietnam Veterans Memorial Highway
172 mi · 02h 43m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny leaving Caldwell and Sunny near Fremont County.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Caldwell to Fremont County?
The road trip is about 369.9 miles (595.3 km) and usually takes 06h 19m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Heyburn is a useful midpoint, sitting about 184.7 miles from Caldwell and 185.2 miles from Fremont County.
How much longer is the road route than the straight-line distance?
The direct path is about 261.8 miles (421.4 km), while the road route adds roughly 108.1 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 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $50.80 one way or $101.61 round trip. Estimated CO2 is about 116 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Caldwell and Sunny near Fremont County.
Stop Ideas Near Heyburn
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 Heyburn.
Twin Falls, Idaho
Flight Path Map
This map shows the direct air route between Caldwell and Fremont County. Straight-line distance: 261.84 mi (421.39 km).
#1 Caldwell
The most populous city in Canyon County, Idaho.
| Population | 58,481 |
| Coordinates | 43.6629400, -116.6873600 |
| Altitude | 724 |
| Country | United States |
#2 Fremont County
County in Idaho, United States
| Population | 13,099 |
| Coordinates | 44.2287900, -111.4820200 |
| Altitude | 1892 |
| Country | United States |
End: Fremont County (-111.48202, 44.22879)
Estimated Travel Time
Distance: 595 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 19m |
| 40 mph (64.37 km/h) | 09h 14m |
| 50 mph (80.47 km/h) | 07h 23m |
| 60 mph (96.56 km/h) | 06h 09m |
| 70 mph (112.65 km/h) | 05h 17m |
| 80 mph (129 km/h) | 04h 36m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $50.80 | $101.61 |
| Mid-grade | $4.23 | $55.21 | $110.43 |
| Premium | $4.55 | $59.36 | $118.73 |
| Diesel | $5.41 | $70.63 | $141.25 |
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 Idaho · Apr 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.