Trip from Post Falls, ID to Heyburn, ID

Q: What are the main roads on this route?

The main roads are I 90, I 15, I 86. Expect a mix of highway and local road driving.

Q: Is this a good same-day trip?

Consider an overnight stop or starting very early.

Q: Should I split this drive into multiple days?

Yes. This route is usually more comfortable as a 2-day drive. A sensible stopping point is after roughly 303 miles on day one.

Q: Where should I stop halfway?

The midpoint is about 303.3 miles from Post Falls, ID. Look for rest areas, gas stations, or food options near the halfway mark.

Q: How much does gas cost for this trip?

At current regular gas prices, expect to spend about $96.14 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.

Q: What is the best time to leave?

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.

Q: How many breaks should I plan?

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.

Drive Time

9h 55m

Distance

606.7 mi

976 km

Drive Score

7/10

Good drive

Same Day?

2-day trip

Fuel Cost

$96

one way

EV Charging

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station data

Best Time to Leave

Save up to 27 min

4 AM

9h 46m ★

6 AM

9h 55m

8 AM

10h 13m

10 AM

10h 1m

12 PM

10h 0m

3 PM

10h 2m

5 PM

10h 12m

8 PM

9h 50m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly

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Trip Overview

The drive from Post Falls, ID to Heyburn, ID covers 606.7 miles and takes about 9h 55m behind the wheel. It usually feels better as a 2-day road trip than as one long push.

The route leans on I 90, I 15, I 86 for much of the mileage, and the overall profile is long-distance drive. The longest uninterrupted segment is about 285.1 miles on I 90. At current regular gas prices, budget about $96.14 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

303.3 miles from Post Falls, ID

A natural place for your longest stop of the day , about 5h 7m into the drive .

Drive Character

At 606.7 miles and 9h 55m of driving, this is a route where fuel stops, weather, and timing matter more than any single turn. The main roads are I 90 and I 15.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.

There are about 14 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 285.1 miles.

Elevation Profile

Gently rolling terrain

4,563 ft 2,179 ft

Total Climb

2,385 ft

Total Descent

0 ft

Highest Point

4,563 ft

~252.8 mi in

Elevation Range

2,385 ft

How Hard Is This Drive?

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 Spokane Street.

Route Complexity 4/10

Easy - simple navigation with a manageable amount of wheel time

The route itself is not hard, but at 9h 55m, endurance matters. Plan breaks every 2-3 hours. The 10 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 286 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 530.8 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.

Critical Maneuvers

5 of 10 key points

These 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

5

286 mi into trip | ~4h 50m 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

6

530.8 mi into trip | ~8h 41m in

Take the exit toward I 86 West: Chubbuck, Twin Falls

Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one

Exit 72 Toward I 86 West: Chubbuck, Twin Falls

5

604.5 mi into trip | ~9h 50m in | I 84 Business; US 30

Take the exit onto I 84 Business; US 30 toward I 84 Business, US 30, ID 24: Heyburn, Burley

Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one

Toward I 84 Business, US 30, ID 24: Heyburn, Bu...

4

606.7 mi into trip | ~9h 55m in | O Street

Turn right onto O Street

Navigation decision point

Towns Along This Route

Between Post Falls, ID and Heyburn, ID, road signs point toward Idaho Falls and Twin Falls.

Idaho Falls

286 mi in | ~4h 50m

Twin Falls

530.8 mi in | ~8h 41m

Main Roads

Road	Distance	Duration
I 90	285.1 mi	4h 47m
I 15	244.3 mi	3h 49m
I 86	62.7 mi	59m
Vietnam Veterans Memorial Highway	10.4 mi	9m
I 84 Business	1.5 mi	2m
18th Street	0.7 mi	1m
North Spokane Street	0.4 mi	1m
West 10th Avenue	0.2 mi	<1m

Longest stretch: I 90 — 285.1 mi, about 4h 47m

Turn-by-Turn Driving Directions

Step-by-step road directions between Post Falls, ID and Heyburn, 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

285 mi · 4 hr 47 min · I 90

5

Take the exit

0.5 mi · 1 min

Toward I 15 South: Dillon, Idaho Falls

6

Merge onto I 15

244 mi · 3 hr 49 min · I 15

7

Take the exit

0.6 mi · 43 sec

Exit 72 Toward I 86 West: Chubbuck, Twin Falls

8

Continue on I 86

63 mi · 59 min · I 86

9

Continue on I 84; US 30

10 mi · 9 min · Vietnam Veterans Memorial Highway

10

Take the exit onto I 84 Business; US 30

0.3 mi · 32 sec · I 84 Business; US 30

Toward I 84 Business, US 30, ID 24: Heyburn, Burley

11

At end of road, turn left onto I 84 Business; US 30

1.3 mi · 1 min · I 84 Business; US 30

12

Turn right onto 18th Street

0.7 mi · 1 min · 18th Street

13

Turn right onto O Street

44 ft · 1 sec · O Street

14

Arrive at destination

O Street

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 303.3 miles from Post Falls, ID, or about 5h 7m into the drive.

The longest continuous stretch on this route runs about 285.1 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 133 miles or 2h 15m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 303.3 miles or 5h 7m 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 303.3 miles or 5h 7m

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 8h 56m

Traffic, exits, and arrival timing usually matter more near Heyburn, 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 303 miles and 5 hours of wheel time on this day.

Day 2

Finish the approach into Heyburn, ID

Aim for roughly 303 miles and 5 hours of wheel time on this day.

Your first comfortable stop window is around 133 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 285.1 miles.

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

Halfway Point

Midpoint

About 303.3 mi from Post Falls, ID · 5h 7m into the drive

First major stop

Coffee and fuel

Thompson Falls, MT

200 mi into the route

Best for: Coffee, fuel, and an easy first stretch

This is a natural early stop once the first hours of the drive are behind you.

Second major stop

Overnight candidate

Butte, MT

400 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 Butte, MT

Overnight Options

Night 1

Missoula, MT

303 mi · about 5h in

A practical overnight split lands near Missoula, MT after about 303 miles or 5 hours of driving.

Find hotels

Pacing Suggestions

Thompson Falls, MT

Fuel and coffee

A short stop after about 133 miles helps settle the day before fatigue starts building.

Whitehall, MT

Meal break

The midpoint is around 303.3 miles from Post Falls, 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 285.1 miles.

Overnight split

Hotel stop

For a steadier pace, wrap day one after about 303 miles or 5 hours on the road.

Arriving in Heyburn, ID

The final approach into Heyburn, 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 Heyburn, ID.

On a multi-day trip, keep the last day a little lighter so you reach Heyburn, 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

$96.14 one way

$192.28 round trip

$4.03/gal 25.4 MPG avg 212 kg CO₂

Fuel Type	$/gal	One Way	Round Trip
midgrade	$4.23	$101.06	$202.12
premium	$4.53	$108.18	$216.36
diesel	$5.64	$134.79	$269.58

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$96

Hotel (1n)

$80–$140

Meals

$50–$100

Total

$226–$336

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 212.3 kg one way. Prices: EIA weekly data, 2026-04-06.

Driving Electric?

About $64 in charging · 2 stops · 67% less CO₂

Vehicle Type	kWh	Stops	DC Fast	Home Charge
Average EV	182	2	$63.70	$29.12
Efficient EV	151.7	1	$53.09	$24.27
EV Truck/SUV	242.7	3	$84.94	$38.83

Gas CO2

212 kg

EV CO2

71 kg (67% less)

Plan for 2 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.

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 data refreshed 16 hours ago

Origin

Post Falls, ID

Evening in Post Falls on Sunday

Local time

5:50 PM

PDT

Current temp

43°F

Partly Cloudy

SE 2 mph 6% chance Live forecast

Destination

Heyburn, ID

Evening in Heyburn on Sunday

Local time

6:50 PM

MDT

Current temp

40°F

Mostly Cloudy

E 7 mph 10% 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.

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

3 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

9h 55m 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 Heyburn, ID covers 606.7 miles and takes about 9h 55m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.