Origin
Post Falls, ID
Late night in Post Falls on Friday
Local time
5:20 AM
PDT
Current temp
45°F
Unavailable
Live forecast
Trip from Post Falls, ID to Ashton, ID
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 17, 2026 · Editorial standards
Drive Time
8h 20m
Distance
466.8 mi
751 km
Drive Score
8/10
Great drive
Same Day?
2-day trip
Fuel Cost
$74
one way
EV Charging
Unknown
Best Time to Leave
4 AM
8h 13m
★
6 AM
8h 21m
8 AM
8h 36m
10 AM
8h 26m
12 PM
8h 24m
3 PM
8h 27m
5 PM
8h 35m
8 PM
8h 16m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Post Falls, ID
Daniil Komov
Ashton, ID
Ever Rayan
Trip Overview
The drive from Post Falls, ID to Ashton, ID covers 466.8 miles and takes about 8h 20m behind the wheel. It usually feels better as a 2-day road trip than as one long push.
The route leans on I 90, US 287, Idaho Medal of Honor Highway for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 288.7 miles on I 90. At current regular gas prices, budget about $73.97 one way before food or hotel costs.
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
233.4 miles from Post Falls, ID
A natural place for your longest stop of the day , about 3h 57m into the drive .
Who Is This Route For?
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
8h 20m drive, plan rest stops for pacing.
First-Time Driver
Mostly highway driving (91%). Straightforward navigation.
Drive Character
This is a 8h 20m highway drive covering 466.8 miles, with most of the trip on I 90 and US 287. The longest continuous stretch is about 288.7 miles on I 90.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 15 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 90 is the longest continuous segment at about 288.7 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 90 and US 287. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.2 miles in near North Spokane Street.
Driving Effort
4/10
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 20m, endurance matters. Plan breaks every 2-3 hours. The 11 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 0.2 miles (North Spokane Street): Navigation decision point; at 289.7 miles (I 15; I 90): Highway fork - watch signs carefully. Lane positioning matters here; at 323.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 11 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
0.2 mi into trip
|
~0m in
|
North Spokane Street
Turn right onto North Spokane Street
Navigation decision point
6
289.7 mi into trip
|
~4h 53m in
|
I 15; I 90
Keep slight right at fork onto I 15; I 90
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
5
323.6 mi into trip
|
~5h 28m in
Take the exit toward MT 359: Cardwell, Boulder
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward MT 359: Cardwell, Boulder
5
338.5 mi into trip
|
~5h 46m in
|
US 287
At end of road, turn right onto US 287
Navigation decision point
5
366.6 mi into trip
|
~6h 19m in
|
US 287
At end of road, turn left onto US 287
Navigation decision point
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Post Falls, ID to Ashton, ID, road signs begin pointing toward Boulder along the way.
Boulder
323.6 mi in
|
~5h 28m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 90 | 288.7 mi | 4h 50m |
| US 287 | 68.5 mi | 1h 18m |
| Idaho Medal of Honor Highway | 41.7 mi | 50m |
| I 15 | 33.9 mi | 34m |
| MT 359 | 14.6 mi | 17m |
| ID 87 | 9.1 mi | 11m |
| MT 87 | 8.6 mi | 12m |
| North Spokane Street | 0.4 mi | 1m |
Longest stretch:
I 90
— 288.7 mi, about 4h 50m
Turn-by-Turn Driving Directions
Step-by-step road directions between Post Falls, ID and Ashton, ID.
1
Start on West 10th Avenue
0.2 mi
·
40 sec
·
West 10th Avenue
2
Turn right onto North Spokane Street
0.4 mi
·
1 min
·
North Spokane Street
3
Turn left
0.4 mi
·
51 sec
4
Merge onto I 90
289 mi
·
4 hr 50 min
·
I 90
5
Keep slight right at fork onto I 15; I 90
34 mi
·
34 min
·
I 15; I 90
Use the straight / slight right lanes.
6
Take the exit
0.3 mi
·
38 sec
Toward MT 359: Cardwell, Boulder
7
Turn right onto MT 2
152 ft
·
3 sec
·
MT 2
8
Continue on MT 359
15 mi
·
17 min
·
MT 359
9
At end of road, turn right onto US 287
28 mi
·
33 min
·
US 287
10
At end of road, turn left onto US 287
40 mi
·
45 min
·
US 287
11
Turn right onto MT 87
8.6 mi
·
12 min
·
MT 87
12
Continue on ID 87
9.1 mi
·
11 min
·
ID 87
13
At end of road, turn right onto US 20
42 mi
·
50 min
·
Idaho Medal of Honor Highway
14
Turn left onto ID-47
0.4 mi
·
40 sec
·
Main Street
15
Arrive at destination
ID-47
Trip Plan
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 233.4 miles from Post Falls, ID, or about 3h 57m into the drive.
The longest continuous stretch on this route runs about 288.7 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 103 miles or 1h 45m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 233.4 miles or 3h 57m 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 233.4 miles or 3h 57m
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 7h 4m
Traffic, exits, and arrival timing usually matter more near Ashton, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Post Falls, 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 Post Falls, ID
Aim for roughly 233 miles and 4.2 hours of wheel time on this day.
Day 2
Finish the approach into Ashton, ID
Aim for roughly 233 miles and 4.2 hours of wheel time on this day.
Your first comfortable stop window is around 103 miles from Post Falls, 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 288.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 233.4 mi from Post Falls, ID · 3h 57m into the drive
Mid-route town
Overnight candidate
233 mi into the route
Best for: Hotel check-in, dinner, and a fresh start
This lines up well with a realistic day-end stop if you are breaking the drive into stages.
Find hotels in Frenchtown, MTOvernight Options
Night 1
233 mi · about 4.2h in
A practical overnight split lands near Frenchtown, MT after about 233 miles or 4.2 hours of driving.
Find hotelsPacing Suggestions
Fuel and coffee
A short stop after about 103 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 233.4 miles from Post Falls, ID, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 90 if your tank is already low. That segment runs about 288.7 miles.
Overnight split
Hotel stopFor a steadier pace, wrap day one after about 233 miles or 4.2 hours on the road.
Arriving in Ashton, ID
The final approach into Ashton, 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 Ashton, ID.
On a multi-day trip, keep the last day a little lighter so you reach Ashton, ID with some flexibility left in the schedule.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$73.97 one way
$147.94 round trip
$4.03/gal
25.4 MPG avg
163 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.22 | $77.54 | $155.07 |
| premium | $4.53 | $83.27 | $166.54 |
| diesel | $5.61 | $103.06 | $206.13 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$74
Hotel (1n)
$80–$140
Meals
$50–$100
Total
$204–$314
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 163.3 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $49 in charging · 1 stop · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 140 | 1 | $49.01 | $22.41 |
| Efficient EV | 116.7 | 1 | $40.85 | $18.67 |
| EV Truck/SUV | 186.7 | 2 | $65.35 | $29.88 |
Gas CO2
163 kg
EV CO2
55 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.
Destination
Ashton, ID
Morning in Ashton on Friday
Local time
6:20 AM
MDT
Current temp
69°F
Unavailable
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.
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
24 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
8h 20m 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.
Frequently Asked Questions
The drive from Post Falls, ID to Ashton, ID covers 466.8 miles and takes about 8h 20m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 90, US 287, Idaho Medal of Honor Highway. Most of the drive stays on highways, so watch for ramps and exits.
Consider an overnight stop or starting very early.
Yes. This route is usually more comfortable as a 2-day drive. A sensible stopping point is after roughly 233 miles on day one.
The midpoint is about 233.4 miles from Post Falls, ID. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $73.97 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 2 meaningful breaks for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
The route itself is not hard, but at 8h 20m, endurance matters. Plan breaks every 2-3 hours. The 11 decision points are all manageable with basic attention.
The main spots that need attention: at 0.2 miles (North Spokane Street): Navigation decision point; at 289.7 miles (I 15; I 90): Highway fork - watch signs carefully. Lane positioning matters here; at 323.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
On the drive from Post Falls, ID to Ashton, ID, road signs begin pointing toward Boulder along the way.
How this page is built
Compiled and maintained by the Trip.ovh planning team at COD Solutions Oy (Helsinki). Each route is built from authoritative open government and mapping datasets rather than crowdsourced reviews. Distances and geometry come from OSRM over OpenStreetMap. Fuel cost uses EIA weekly regional averages. Pages are published only after passing our data-quality checks; our methodology page documents refresh cadence, editorial standards, and known limitations.
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