Coeur d'Alene, ID to Sugar City, ID is 475.9 miles and takes about 8 hours via I 90 and I 15, with a fuel budget near $73 and enough daylight to finish in a day. This trip stays within the Mountain West region, offering a solid day's drive through Idaho. With a recommended two days for the trip, you'll have ample time to break up the driving and enjoy the scenery. It's a straightforward route, primarily on major interstates, making it a practical choice for getting from point A to point B efficiently.
Trip Pace
Best split across 2 days
Treat the return leg as its own travel day rather than an afterthought.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
238 miles from Coeur d'Alene, ID
A natural place for your longest stop of the day
, about 4h 1m into the drive
.
Main Roads
Road
Distance
Duration
I 90
275.3 mi
4h 36m
I 15
173.6 mi
2h 42m
East 1500 North
19.4 mi
28m
Yellowstone Highway
4.1 mi
4m
Sherman Avenue
1.2 mi
1m
West Center Street
0.4 mi
<1m
North 7th Street
0.3 mi
<1m
East Garden Avenue
0.2 mi
<1m
Longest stretch:
I 90
— 275.3 mi, about 4h 36m
Traffic on I-90
Hour-of-day weekday pattern from 88 FHWA count stations on your route.
Peak
3 PM
~479 veh/hr typical
· worst 753
Quietest
2 AM
~36 veh/hr
Peak-to-quiet ratio
13.3×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 105 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Coeur d'Alene, ID and Sugar City, ID.
1
Start on East Garden Avenue
0.2 mi·43 sec·East Garden Avenue
2
Turn right onto North 7th Street
0.3 mi·50 sec·North 7th Street
3
Turn left onto Sherman Avenue
1.2 mi·1 min·Sherman Avenue
4
Take the ramp onto I 90
275 mi·4 hr 36 min·I 90
Toward I 90 East
5
Take the exit
0.5 mi·1 min
Toward I 15 South: Dillon, Idaho Falls
6
Merge onto I 15
174 mi·2 hr 42 min·I 15
7
Take the exit
0.2 mi·29 sec
Toward ID 33: Mud Lake, Rexburg
8
Turn left onto ID 33
19 mi·28 min·East 1500 North
9
Take the ramp
0.4 mi·54 sec
Toward US 20
10
Merge onto US 20
4.1 mi·4 min·Yellowstone Highway
11
Take the exit
0.3 mi·36 sec
Toward Sugar City, Salem
12
Turn right onto West Center Street
0.4 mi·52 sec·West Center Street
13
Turn left onto North Austin Avenue
51 ft·2 sec·North Austin Avenue
14
Arrive at destination
North Austin Avenue
Trip Plan
Given the 8-hour drive time, it's best to split this trip over two days to avoid fatigue. Aim to depart early in the morning on your first day to maximize daylight. You'll want to plan for at least two stops, and with 275.3 miles on I 90, consider making your overnight stop around the halfway point. Keep an eye on your fuel levels, especially as you get further from larger towns, as services can become more spread out on the interstate stretches.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 238 miles from Coeur d'Alene, ID, or about 4h 1m into the drive.
The longest continuous stretch on this route runs about 275.3 miles.
Consider an overnight stop or starting very early.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 105 miles or 1h 47m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 238 miles or 4h 1m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Overnight split
Day 1 wrap after about 238 miles or 4h 1m
Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.
Final approach
Final hour starts around 6h 51m
Traffic, exits, and arrival timing usually matter more near Sugar City, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Coeur d'Alene, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
+
Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.
Day 1
Settle into the route from Coeur d'Alene, ID
Aim for roughly 238 miles and 4 hours of wheel time on this day.
Day 2
Finish the approach into Sugar City, ID
Aim for roughly 238 miles and 4 hours of wheel time on this day.
Your first comfortable stop window is around 105 miles from Coeur d'Alene, ID.
This route usually feels better as a 2-day drive than as one long push.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on I 90 for about 275.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
The midpoint is around 238 miles from Coeur d'Alene, ID, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before I 90 if your tank is already low. That segment runs about 275.3 miles.
Overnight split
Hotel stop
For a steadier pace, wrap day one after about 238 miles or 4 hours on the road.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Heads-up: tricky spots
5 of 12
5 decision points cluster between mile 0.2 and 475.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0.2 mi into trip|~0m in|North 7th Street
Turn right onto North 7th Street
Navigation decision point
4
1.6 mi into trip|~3m in|I 90
Take the ramp onto I 90 toward I 90 East
Navigation decision point
Toward I 90 East
5
276.9 mi into trip|~4h 40m in
Take the exit toward I 15 South: Dillon, Idaho Falls
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 15 South: Dillon, Idaho Falls
5
451.1 mi into trip|~7h 24m in
Take the exit toward ID 33: Mud Lake, Rexburg
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward ID 33: Mud Lake, Rexburg
5
475.2 mi into trip|~7h 59m in
Take the exit toward Sugar City, Salem
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward Sugar City, Salem
Fuel & Cost
Regular Gas
$82.53 one way
$165.07 round trip
$4.41/gal25.4 MPG avg167 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.61
$86.32
$172.64
premium
$4.95
$92.74
$185.49
diesel
$5.60
$104.90
$209.81
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$83
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$213–$323
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 166.5 kg one way.
Prices: EIA weekly data, 2026-08-31.
Driving Electric?
About $50 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
142.8
1
$49.97
$22.84
Efficient EV
119
1
$41.64
$19.04
EV Truck/SUV
190.4
2
$66.63
$30.46
Gas CO2
167 kg
EV CO2
56 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Aug 26, 2026
Origin
Coeur d'Alene, ID
Night
in Coeur d'Alene on Tuesday
Local time
11:41 PM
PDT
Current temp
64°F
Haze
E 2 mph5% chanceLive forecast
Fire Weather Watch
Fire Weather Watch issued August 25 at 1:37PM MDT until August 27 at 9:00PM MDT by NWS Boise ID
Red Flag Warning
Red Flag Warning issued August 25 at 1:07PM MDT until August 26 at 8:00PM MDT by NWS Missoula MT
Destination
Sugar City, ID
Late night
in Sugar City on Wednesday
Local time
12:41 AM
MDT
Current temp
53°F
Mostly Cloudy
ENE 5 mph5% chanceLive forecast
Fire Weather Watch
Fire Weather Watch issued August 25 at 1:37PM MDT until August 27 at 9:00PM MDT by NWS Boise ID
Red Flag Warning
Red Flag Warning issued August 25 at 1:07PM MDT until August 26 at 8:00PM MDT by NWS Missoula MT
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.
For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.
Time zone
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
11 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
8h on the road
This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
This route is mostly highway, with 94% of the drive on major roads. You'll spend the longest stretch, 275.3 miles, on I 90. The transition to surface streets, like East 1500 North, will happen near your destination. Expect a significant amount of rural cruising and fewer exits for extended periods on the interstate.
94% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 275.3 mi on I 90.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 90 and I 15. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.2 miles in near North 7th Street.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
The route itself is not hard, but at 8h, endurance matters. Plan breaks every 2-3 hours. The 12 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 0.2 miles (North 7th Street): Navigation decision point; at 1.6 miles (I 90): Navigation decision point; at 276.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Elevation Profile
High-altitude sections with notable climbs
6,361 ft2,191 ft
Total Climb
5,269 ft
Total Descent
2,564 ft
Highest Point
6,361 ft
~408 mi in
Elevation Range
4,170 ft
Notable High Points
3,583 ft at ~68 miles+849 ft prominence
5,362 ft at ~272 miles+98 ft prominence
6,361 ft at ~408 miles+365 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Coeur d'Alene, ID and Sugar City, ID, road signs point toward Idaho Falls and Rexburg.
The longest stretch is about 275.3 miles on I 90. The full list of main roads is in the Roads section above.
Yes — a 2-day pace is more comfortable than one long haul. A sensible stopping point is after roughly 238 miles on day one.
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.
It helps. This is a long drive, so arriving tired and in the dark compounds. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Sugar City, ID before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
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 0.2 miles (North 7th Street): Navigation decision point; at 1.6 miles (I 90): Navigation decision point; at 276.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Not recommended in a single day. At 8.0 hours each way, a round trip means 16.0 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Sugar City, ID before the return drive.
