Spanning 154.6 miles across the Mountain West, the drive from Sun Valley to Idaho Falls is a straightforward journey typically taking about 3 hours and 16 minutes. Because of the manageable duration, this route works perfectly as a single-day trip, allowing you to reach your destination without needing an overnight stay. You will navigate via Moritz Road, Sun Valley Road, and North Main Street to complete the transit. Budget roughly $24 for fuel to cover the distance comfortably. Since both cities are located within the Idaho region, the transition remains consistent, offering a reliable path through the local landscape that avoids the complexity of major interstate travel.
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
77.3 miles from Sun Valley, ID
A natural place for your longest stop of the day
, about 1h 45m into the drive
.
Main Roads
Road
Distance
Duration
Idaho Medal of Honor Highway
92.4 mi
1h 45m
West Arco Highway
19.6 mi
21m
North Main Street
17.3 mi
25m
Gannett Picabo Road
7.8 mi
11m
Gannett Road
4 mi
9m
West Sunnyside Road
2.7 mi
3m
Main Street
2.3 mi
2m
South 45th West
2 mi
3m
Longest stretch:
Idaho Medal of Honor Highway
— 92.4 mi, about 1h 45m
Turn-by-Turn Driving Directions
Step-by-step road directions between Sun Valley, ID and Idaho Falls, 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
17 mi·25 min·North Main Street
5
Turn left onto Gannett Picabo Road
7.8 mi·11 min·Gannett Picabo Road
6
Continue on Gannett Road
4.0 mi·9 min·Gannett Road
7
At end of road, turn left onto US 20
9.4 mi·10 min·Idaho Medal of Honor Highway
8
Continue on US 20
0.5 mi·50 sec·Queens Crown Road
9
Turn left onto US 93; US 20; US 26
2.3 mi·2 min·Main Street
10
Continue on US 93; US 20; US 26
41 mi·47 min·Idaho Medal of Honor Highway
11
Continue on US 93; US 20; US 26
0.5 mi·58 sec·Grand Avenue
12
Turn right onto Park Road
0.4 mi·30 sec·Park Road
13
Continue on West Temple Avenue
0.2 mi·41 sec·West Temple Avenue
14
Turn left onto County Road
68 ft·9 sec·County Road
15
Turn sharp right onto US 20; US 26
0.2 mi·30 sec·South Front Street
16
Continue on US 20; US 26
23 mi·26 min·Idaho Medal of Honor Highway
17
Keep slight left at fork onto US 20; US 26
19 mi·20 min·Idaho Medal of Honor Highway
18
Continue on US 20
20 mi·21 min·West Arco Highway
19
Continue on US 20
1.0 mi·1 min·West Broadway Street
20
Turn right onto South 45th West
2.0 mi·3 min·South 45th West
21
Turn left onto West 33rd South
1.8 mi·2 min·West 33rd South
22
Continue on I 15 BUS; US 26
2.7 mi·3 min·West Sunnyside Road
23
Turn right onto Stonebrook Lane
466 ft·14 sec·Stonebrook Lane
24
Turn right onto West Stone Run Lane
241 ft·16 sec·West Stone Run Lane
25
Turn left onto Charleston Lane
152 ft·6 sec·Charleston Lane
26
Arrive at destination
Charleston Lane
Trip Plan
Plan for one well-timed stop during your 3-hour and 16-minute excursion to keep your energy levels consistent. Since this is a local road-intensive journey, departing in the morning is your best strategy to avoid mid-day congestion and ensure you arrive in Idaho Falls before the evening rush. Keep in mind that your $24 fuel budget is based on current estimates, so it is wise to fill up before leaving Sun Valley to avoid potential price fluctuations in more remote stretches. Given the turn-heavy nature of the route, prioritize checking your tire pressure and vehicle fluids before heading out. The flexibility of this shorter drive means you can easily adjust your departure time to suit your personal schedule without worrying about complex overnight logistics.
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 77.3 miles from Sun Valley, ID, or about 1h 45m into the drive.
The longest continuous stretch on this route runs about 92.4 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 34 miles or 55m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 77.3 miles or 1h 45m 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 42m
Traffic, exits, and arrival timing usually matter more near Idaho Falls, 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 154.6 miles and 3h 16m.
Your first comfortable stop window is around 34 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 Idaho Medal of Honor Highway for about 92.4 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 14
5 decision points cluster between mile 0.1 and 154.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.1 mi into trip|~0m in|Moritz Road
Turn left onto Moritz Road
Navigation decision point
4
0.2 mi into trip|~0m in|ID 75 Spur / Sun Valley Road
At end of road, turn left onto ID 75 Spur / Sun Valley Road
Navigation decision point
6
85 mi into trip|~1h 55m in|US 20; US 26 / South Front Street
Turn sharp right onto US 20; US 26 / South Front Street
Sharp turn - reduce speed on approach
5
154.6 mi into trip|~3h 15m in|West Stone Run Lane
Turn right onto West Stone Run Lane
Navigation decision point
5
154.6 mi into trip|~3h 15m in|Charleston Lane
Turn left onto Charleston Lane
Navigation decision point
Fuel & Cost
Regular Gas
$24.50 one way
$49.00 round trip
$4.03/gal25.4 MPG avg54 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$25.68
$51.36
premium
$4.53
$27.58
$55.16
diesel
$5.61
$34.13
$68.27
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$25
Meals
$25–$50
Total
$50–$75
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 54.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $16 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
46.4
0
$16.23
$7.42
Efficient EV
38.7
0
$13.53
$6.18
EV Truck/SUV
61.8
0
$21.64
$9.89
Gas CO2
54 kg
EV CO2
18 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.
Forecast as of Apr 21, 2026
Origin
Sun Valley, ID
Late night
in Sun Valley on Tuesday
Local time
4:36 AM
MDT
Current temp
43°F
Unavailable
Live forecast
Destination
Idaho Falls, ID
Late night
in Idaho Falls on Tuesday
Local time
4:36 AM
MDT
Current temp
43°F
Mostly Clear
ESE 6 to 9 mph1% chanceLive forecast
55°F
Carey, ID
77 mi in
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
3h 16m 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.
More Details
What kind of drive is this?
Expect a turn-heavy local drive that demands your full attention behind the wheel. Unlike a monotonous interstate slog, this route features zero highway miles, meaning you will navigate surface streets and local thoroughfares for the duration of the 154.6-mile trek. The road profile is distinctly technical, requiring you to remain alert as you navigate the winding sections between the two mountain hubs. Because the entire trip is composed of local roads, you should prepare for a varied driving pace rather than steady highway cruising. This is a hands-on driving experience that rewards those who enjoy maneuvering through the local terrain.
Only 0% highway — the rest is turn-by-turn surface driving.
26 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 92.4 mi on Idaho Medal of Honor Highway.
How Hard Is This Drive?
3/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.1 miles in near Moritz Road.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 3h 16m drive. You will face about 14 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (Moritz Road): Navigation decision point; at 0.2 miles (ID 75 Spur / Sun Valley Road): Navigation decision point; at 85 miles (US 20; US 26 / South Front Street): Sharp turn - reduce speed on approach.
Idaho Falls is a city in Eastern Idaho. Idaho Falls serves as the commercial, cultural, and healthcare hub for Eastern Idaho. The city attracts many tourists visiting nearby Yellowstone and Grand Teton National Parks, Jackson Hole, and fishing on the Snake River. Due to its proximity to high-profile outdoor destinations, in 2009, Idaho Falls was named to National Geographic's list of the "100 Best Adventure Towns".
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 92.4 miles on Idaho Medal of Honor Highway. The full list of main roads is in the Roads section above.
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.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
Mostly yes along the main roads, but rural stretches through ID can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: at 0.1 miles (Moritz Road): Navigation decision point; at 0.2 miles (ID 75 Spur / Sun Valley Road): Navigation decision point; at 85 miles (US 20; US 26 / South Front Street): Sharp turn - reduce speed on approach.
Possible but tiring. At 3.3 hours each way, an in-and-out day trip would put you behind the wheel for 6.5 hours — manageable with a long break at Idaho Falls, ID, but most travelers stay overnight.
