Origin
Sun Valley, ID
Evening in Sun Valley on Sunday
Local time
6:54 PM
MDT
Current temp
30°F
Unavailable
Live forecast
Trip from Sun Valley, ID to Caldwell, ID
Drive Time
3h 32m
Distance
178.8 mi
288 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$28
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
3h 20m
★
6 AM
3h 32m
8 AM
3h 57m
10 AM
3h 41m
12 PM
3h 38m
3 PM
3h 42m
5 PM
3h 55m
8 PM
3h 25m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Sun Valley, ID
Sergio Zhukov
Caldwell, ID
Liliana Drew
Trip Overview
Transitioning from the high-altitude Mountain West of Sun Valley to the urbanized landscape of Caldwell is a straightforward journey spanning 178.8 miles. You can expect to spend approximately 3 hours and 32 minutes behind the wheel, making this a very manageable day trip that doesn't require an overnight stay. Your travel budget should account for roughly $28 in fuel costs to cover the distance. Navigating via the Vietnam Veterans Memorial Highway, the Idaho Medal of Honor Highway, and the Sun Valley Highway, you will find this transition from the mountains to the valley floor provides a clear change in scenery. It is an efficient route that allows you to comfortably reach your destination in a single afternoon.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
89.4 miles from Sun Valley, ID
A natural place for your longest stop of the day , about 1h 54m into the drive .
Drive Character
Expect a turn-heavy local drive that demands your full attention rather than a monotonous interstate cruise. With only two main highways making up the bulk of your path, the route offers a more intimate feel than a standard multi-lane freeway. Your longest uninterrupted stretch covers 63 miles along the Vietnam Veterans Memorial Highway, giving you a consistent rhythm before the road configuration shifts. Because the highway share is relatively low at 2%, you will spend much of your time navigating local stretches that require frequent adjustments. The technical nature of these turns keeps the drive engaging and ensures you stay alert throughout the entire 3.5-hour trek.
This route has more turning and local-road decision points than a simple highway run.
There are about 17 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Vietnam Veterans Memorial Highway is the longest continuous segment at about 63 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. Navigation is very simple — set it and forget it for most of the drive. The trickiest moment comes around 0.1 miles in near Moritz Road.
Route Complexity
2/10
Very easy - short and simple to drive
The drive from Sun Valley, ID to Caldwell, ID is easy. At 3h 32m with 2% highway, most drivers will find it relaxed and low-stress.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (Moritz Road): Navigation decision point; at 110.4 miles (US 20 / Idaho Medal of Honor Highway): Multiple destination signs - pick the right one; at 110.6 miles (I 84; US 20; US 26; US 30 / Vietnam Veterans Memorial Highway): Merge point - match speed before joining. Lane positioning matters here.
Critical Maneuvers
5 of 12 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
0.1 mi into trip
|
~0m in
|
Moritz Road
Turn left onto Moritz Road
Navigation decision point
6
110.4 mi into trip
|
~2h 19m in
|
US 20 / Idaho Medal of Honor Highway
Take the ramp onto US 20 / Idaho Medal of Honor Highway toward I 84 West, US 20 West, US 26 West, US 30 West: Boise
Multiple destination signs - pick the right one
Toward I 84 West, US 20 West, US 26 West, US 30...
5
110.6 mi into trip
|
~2h 19m in
|
I 84; US 20; US 26; US 30 / Vietnam Veterans Memorial Highway
Merge onto I 84; US 20; US 26; US 30 / Vietnam Veterans Memorial Highway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
7
176.6 mi into trip
|
~3h 27m in
Take the exit toward US 20, US 26 East
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / left lanes.
Toward US 20, US 26 East
5
178.7 mi into trip
|
~3h 31m in
Turn left
Navigation decision point
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Vietnam Veterans Memorial Highway | 63 mi | 1h 4m |
| Idaho Medal of Honor Highway | 41.9 mi | 48m |
| Sun Valley Highway | 40.8 mi | 47m |
| North Main Street | 26.2 mi | 39m |
| I 84 | 3 mi | 3m |
| Sun Valley Road | 1.5 mi | 3m |
| Blaine Street | 0.8 mi | 1m |
| North 21st Avenue | 0.6 mi | 1m |
Longest stretch:
Vietnam Veterans Memorial Highway
— 63 mi, about 1h 4m
Turn-by-Turn Driving Directions
Step-by-step road directions between Sun Valley, ID and Caldwell, ID.
1
Start on Inn Entry Lane
290 ft
·
13 sec
·
Inn Entry Lane
2
Turn left onto Moritz Road
0.2 mi
·
41 sec
·
Moritz Road
3
At end of road, turn left onto ID 75 Spur
1.5 mi
·
3 min
·
Sun Valley Road
4
Turn left onto ID 75
26 mi
·
39 min
·
North Main Street
5
Turn right onto US 20
42 mi
·
48 min
·
Idaho Medal of Honor Highway
6
Continue on US 20
41 mi
·
47 min
·
Sun Valley Highway
7
Take the ramp onto US 20
0.2 mi
·
31 sec
·
Idaho Medal of Honor Highway
Toward I 84 West, US 20 West, US 26 West, US 30 West: Boise
8
Merge onto I 84; US 20; US 26; US 30
63 mi
·
1 hr 4 min
·
Vietnam Veterans Memorial Highway
Use the straight / slight right lanes.
9
Continue on I 84; US 30
3.0 mi
·
3 min
·
I 84; US 30
10
Take the exit
0.2 mi
·
36 sec
Toward US 20, US 26 East
Use the straight / left lanes.
11
Turn left onto US 20; US 26
0.4 mi
·
52 sec
·
Franklin Road
12
Continue on North 21st Avenue
0.6 mi
·
1 min
·
North 21st Avenue
13
Turn right onto I 84 Business
0.8 mi
·
1 min
·
Blaine Street
14
Turn left onto South 10th Avenue
166 ft
·
9 sec
·
South 10th Avenue
15
Turn left
68 ft
·
6 sec
16
Turn right
79 ft
·
5 sec
17
Arrive at destination
Trip Plan
Since this is a relatively short trip, you have plenty of flexibility regarding your departure time, though planning for at least one dedicated stop will help break up the technical driving sections. Keep your fuel budget around $28 in mind as you head out, and try to time your departure to avoid peak local traffic as you approach Caldwell. Given the turn-heavy profile of the roads, consider pacing your drive to ensure you aren't rushing through the more winding segments. Because the route relies heavily on local highways, stay mindful of changing speed limits and road conditions that may fluctuate more frequently than on a major interstate. This approach ensures you arrive at your destination feeling fresh rather than fatigued.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 89.4 miles from Sun Valley, ID, or about 1h 54m into the drive.
The longest continuous stretch on this route runs about 63 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 80 miles or 1h 43m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 89.4 miles or 1h 54m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 56m
Traffic, exits, and arrival timing usually matter more near Caldwell, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Sun Valley, ID 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.
Day 1
Settle into the route from Sun Valley, ID
This is one driving day of about 178.8 miles and 3h 32m.
Your first comfortable stop window is around 80 miles from Sun Valley, ID.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on Vietnam Veterans Memorial Highway for about 63 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 89.4 mi from Sun Valley, ID · 1h 54m into the drive
Mid-route town
Meal stop
89 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 80 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 89.4 miles from Sun Valley, ID, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before Vietnam Veterans Memorial Highway if your tank is already low. That segment runs about 63 miles.
Arriving in Caldwell, ID
The final approach into Caldwell, ID usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Caldwell, ID.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$28.33 one way
$56.67 round trip
$4.03/gal
25.4 MPG avg
63 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.23 | $29.78 | $59.57 |
| premium | $4.53 | $31.88 | $63.76 |
| diesel | $5.64 | $39.72 | $79.45 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$28
Meals
$25–$50
Total
$53–$78
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 62.6 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $19 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 53.6 | 0 | $18.77 | $8.58 |
| Efficient EV | 44.7 | 0 | $15.65 | $7.15 |
| EV Truck/SUV | 71.5 | 0 | $25.03 | $11.44 |
Gas CO2
63 kg
EV CO2
21 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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.
Destination
Caldwell, ID
Evening in Caldwell on Sunday
Local time
6:54 PM
MDT
Current temp
46°F
Mostly Cloudy then Rain Showers Likely
SE 5 mph
65% chance
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.
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
16 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
3h 32m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Sun Valley, ID to Caldwell, ID covers 178.8 miles and takes about 3h 32m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Vietnam Veterans Memorial Highway, Idaho Medal of Honor Highway, Sun Valley Highway. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 89.4 miles from Sun Valley, ID. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $28.33 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
The drive from Sun Valley, ID to Caldwell, ID is easy. At 3h 32m with 2% highway, most drivers will find it relaxed and low-stress.
The main spots that need attention: at 0.1 miles (Moritz Road): Navigation decision point; at 110.4 miles (US 20 / Idaho Medal of Honor Highway): Multiple destination signs - pick the right one; at 110.6 miles (I 84; US 20; US 26; US 30 / Vietnam Veterans Memorial Highway): Merge point - match speed before joining. Lane positioning matters here.
The route from Sun Valley, ID to Caldwell, ID does not surface many named destination signs beyond the main corridor.
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