The drive from Saint Maries, ID to Pocatello, ID covers 537.5 miles and takes about 9h 1m 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, South Highway 3 for much of the mileage,
and the overall profile is long-distance drive.
The longest uninterrupted segment is about 256.2 miles on I 90.
At current regular gas prices, budget about $85.17 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
268.7 miles from Saint Maries, ID
A natural place for your longest stop of the day
, about 4h 42m into the drive
.
Who Is This Route For?
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
At 537.5 miles and 9h 1m 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 16 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 256.2 miles.
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 early in the drive near South 3rd 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 9h 1m, 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: near the start (South 3rd Street): Navigation decision point; at 289 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 535.1 miles (I 15 BUS): Exit ramp - move to the correct lane early.
Critical Maneuvers
5 of 12 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
5
0 mi into trip|~0m in|South 3rd Street
Turn left onto South 3rd Street
Navigation decision point
5
289 mi into trip|~5h 3m 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
535.1 mi into trip|~8h 55m in|I 15 BUS
Take the exit onto I 15 BUS toward Pocatello Creek Road
Exit ramp - move to the correct lane early
Exit 71
Toward Pocatello Creek Road
5
535.3 mi into trip|~8h 55m in|I 15 BUS
Keep slight right at fork onto I 15 BUS
Highway fork - watch signs carefully
Exit 71
5
536.8 mi into trip|~8h 58m in|East Oak Street
At end of road, turn right onto East Oak Street
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 Saint Maries, ID to Pocatello, ID, road signs begin pointing toward Idaho Falls along the way.
Idaho Falls
289 mi in|~5h 3m
Main Roads
Road
Distance
Duration
I 90
256.2 mi
4h 13m
I 15
245.5 mi
3h 51m
South Highway 3
21.8 mi
32m
Highway 3 North
10.7 mi
15m
Jefferson Avenue
1 mi
1m
I 15 BUS
0.7 mi
1m
East Bridger Street
0.3 mi
1m
South 3rd Street
0.2 mi
<1m
Longest stretch:
I 90
— 256.2 mi, about 4h 13m
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Maries, ID and Pocatello, ID.
1
Start on West Jefferson Avenue
49 ft·7 sec·West Jefferson Avenue
2
Turn left onto South 3rd Street
0.2 mi·26 sec·South 3rd Street
3
Continue on ID 3
11 mi·15 min·Highway 3 North
4
Continue on ID 3
22 mi·32 min·South Highway 3
5
Take the ramp
0.2 mi·28 sec
6
Merge onto I 90
256 mi·4 hr 13 min·I 90
7
Take the exit
0.5 mi·1 min
Toward I 15 South: Dillon, Idaho Falls
8
Merge onto I 15
246 mi·3 hr 51 min·I 15
9
Take the exit onto I 15 BUS
0.3 mi·32 sec·I 15 BUS
Exit 71Toward Pocatello Creek Road
10
Keep slight right at fork onto I 15 BUS
0.5 mi·1 min·I 15 BUS
Exit 71
11
Turn left onto Jefferson Avenue
1.0 mi·1 min·Jefferson Avenue
12
At end of road, turn right onto East Oak Street
332 ft·11 sec·East Oak Street
13
Turn left onto North 12th Avenue
0.1 mi·24 sec·North 12th Avenue
14
Turn right onto East Bridger Street
0.3 mi·1 min·East Bridger Street
15
Turn left onto North 7th Avenue
495 ft·21 sec·North 7th Avenue
16
Arrive at destination
North 7th Avenue
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 268.7 miles from Saint Maries, ID, or about 4h 42m into the drive.
The longest continuous stretch on this route runs about 256.2 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 118 miles or 2h 13m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 268.7 miles or 4h 42m 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 268.7 miles or 4h 42m
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 1m
Traffic, exits, and arrival timing usually matter more near Pocatello, ID than in the middle of the route.
Before You Leave
+
Open the route before leaving Saint Maries, 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 Saint Maries, ID
Aim for roughly 269 miles and 4.5 hours of wheel time on this day.
Day 2
Finish the approach into Pocatello, ID
Aim for roughly 269 miles and 4.5 hours of wheel time on this day.
Your first comfortable stop window is around 118 miles from Saint Maries, 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 256.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 268.7 mi from Saint Maries, ID
· 4h 42m into the drive
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $56 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
161.3
1
$56.44
$25.80
Efficient EV
134.4
1
$47.03
$21.50
EV Truck/SUV
215
2
$75.25
$34.40
Gas CO2
188 kg
EV CO2
63 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 Apr 14, 2026
Origin
Saint Maries, ID
Evening
in Saint Maries on Friday
Local time
7:20 PM
PDT
Current temp
44°F
Unavailable
Live forecast
Destination
Pocatello, ID
Evening
in Pocatello on Friday
Local time
8:20 PM
MDT
Current temp
55°F
Mostly Sunny
W 14 mph7% chanceLive forecast
Wind Advisory
Wind Advisory issued April 14 at 12:44PM MDT until April 15 at 9:00PM MDT by NWS Pocatello ID
Winter Weather Advisory
Winter Weather Advisory issued April 14 at 12:34PM MDT until April 16 at 12:00PM MDT by NWS Pocatello ID
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 warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
9h 1m 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 Saint Maries, ID to Pocatello, ID covers 537.5 miles and takes about 9h 1m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 90, I 15, South Highway 3. Expect a mix of highway and local road driving.
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 269 miles on day one.
The midpoint is about 268.7 miles from Saint Maries, ID. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $85.17 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 9h 1m, endurance matters. Plan breaks every 2-3 hours. The 12 decision points are all manageable with basic attention.
The main spots that need attention: near the start (South 3rd Street): Navigation decision point; at 289 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 535.1 miles (I 15 BUS): Exit ramp - move to the correct lane early.
On the drive from Saint Maries, ID to Pocatello, ID, road signs begin pointing toward Idaho Falls along the way.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
