Roundup, MT to Whitefish, MT is 399.6 miles and takes about 7h 55m via US 87 and US 2, with a fuel budget near $71 and enough daylight to finish in a day. This drive stays within Montana, moving from the Mountain West region to another part of the same region. It's a straightforward, predominantly highway trip, best suited for a single day of driving if you're looking to get from point A to B efficiently. You'll spend most of your time on main roads, making it a practical choice for covering ground.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
199.8 miles from Roundup, MT
A natural place for your longest stop of the day
, about 3h 58m into the drive
.
Main Roads
Road
Distance
Duration
US 87
158.6 mi
3h 8m
US 2
80.2 mi
1h 32m
United States Highway 89
49.2 mi
53m
US 89
40.5 mi
45m
US Highway 87
14.7 mi
15m
13th Lane Northwest
12.9 mi
15m
First Special Service Force Memorial Highway
9.4 mi
9m
US Route 2
7.5 mi
10m
Longest stretch:
US 87
— 158.6 mi, about 3h 8m
Traffic on I-15
Hour-of-day weekday pattern from 4 FHWA count stations on your route.
Peak
5 PM
~391 veh/hr typical
· worst 507
Quietest
1 AM
~14 veh/hr
Peak-to-quiet ratio
27.9×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 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 Roundup, MT and Whitefish, MT.
1
Start on US 12; US 87
0.5 mi·45 sec·Main Street
2
Turn slight left onto US 87
44 mi·1 hr 2 min·US 87
3
Turn left onto US 87; MT 200
31 mi·34 min·US 87; MT 200
4
Turn right onto 1st Avenue North
0.3 mi·29 sec·1st Avenue North
5
Continue on US 191
2.6 mi·3 min·Truck Bypass
6
Continue on US 87; US 191; MT 200
15 mi·15 min·US Highway 87
7
Continue on US 87; MT 3; MT 200
64 mi·1 hr 9 min·US 87; MT 3; MT 200
8
Turn slight right
0.3 mi·20 sec
9
Enter roundabout
172 ft·2 sec
10
Continue
0.1 mi·7 sec
11
Continue on US 87; US 89; MT 3; MT 200
19 mi·20 min·US 87; US 89; MT 3; MT 200
12
Turn right onto US 87 Bypass
0.9 mi·1 min·57th Street South
13
Turn left onto 2nd Avenue North
4.3 mi·7 min·2nd Avenue North
14
At end of road, turn left onto I 15 Business
240 ft·4 sec·Park Drive North
15
Turn right onto I 15 Business
0.2 mi·23 sec·1st Avenue North
16
Continue on I 15 Business
0.2 mi·17 sec·First Avenue North Bridge
17
Continue on I 15 Business
1.4 mi·1 min·Central Avenue West
18
Take the exit onto I 15 Business
0.2 mi·32 sec·I 15 Business
19
Merge onto I 15; US 89; MT 200
9.4 mi·9 min·First Special Service Force Memorial Highway
20
Take the exit onto US 89; MT 200
8.3 mi·9 min·US 89; MT 200
Exit 290
21
Turn right onto US 89
32 mi·35 min·US 89
22
Enter roundabout onto US 89
514 ft·17 sec·West Division Street
23
Continue on US 89
143 ft·4 sec·West Division Street
24
Turn slight right onto US 89
6.0 mi·8 min·Main Avenue North
25
Continue on US 89
13 mi·15 min·13th Lane Northwest
26
Continue on US 89
49 mi·53 min·United States Highway 89
27
At end of road, turn left onto US 2; US 89
3.9 mi·6 min·US 2; US 89
28
Enter roundabout onto US 2
246 ft·3 sec·US 2
29
Continue on US 2
72 mi·1 hr 19 min·US 2
30
Turn right
0.2 mi·1 min
31
At end of road, turn left onto Old US 2
0.4 mi·1 min·Old US 2
32
Turn right onto US 2
7.5 mi·10 min·US Route 2
33
Continue on US 2
3.0 mi·4 min·US 2
Use the straight lane.
34
Continue on US 2
2.0 mi·4 min·9th Street
35
Continue on US 2
1.0 mi·1 min·US 2
Use the straight / right lanes.
36
Continue on MT 40
4.5 mi·5 min·MT 40
Use the straight / right lanes.
37
Turn right onto US 93
0.5 mi·50 sec·US 93 South
38
Continue on US 93
1.7 mi·3 min·Spokane Avenue
Use the straight lane.
39
Turn left onto US 93
0.1 mi·22 sec·East 2nd Street
40
Turn right
168 ft·12 sec
41
Arrive at destination
Trip Plan
Given the 7h 55m estimated drive time, departing Roundup in the morning is recommended to allow ample daylight for the 399.6-mile trip. With two recommended stops and a fuel cost around $71, plan your fueling strategically, especially during the 158.6-mile stretch on US 87 where services might be less frequent. This drive is manageable in one day, so you have flexibility in timing your stops for breaks or meals. Keep an eye on your fuel gauge as you move through less populated sections of US 87.
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.
You can normally do this drive in one day.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 199.8 miles from Roundup, MT, or about 3h 58m into the drive.
The longest continuous stretch on this route runs about 158.6 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 88 miles or 1h 53m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 199.8 miles or 3h 58m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 6h 37m
Traffic, exits, and arrival timing usually matter more near Whitefish, MT than in the middle of the route.
Before You Leave
+
Open the route before leaving Roundup, MT 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.
Day 1
Settle into the route from Roundup, MT
This is one driving day of about 399.6 miles and 7h 55m.
Your first comfortable stop window is around 88 miles from Roundup, MT.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on US 87 for about 158.6 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 19
5 decision points cluster between mile 157.7 and 378.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
157.7 mi into trip|~3h 8m in
Enter roundabout
Roundabout - know your exit number before entering
5
182.3 mi into trip|~3h 38m in|I 15 Business / Park Drive North
At end of road, turn left onto I 15 Business / Park Drive North
Navigation decision point
5
234.3 mi into trip|~4h 36m in|US 89 / West Division Street
Enter roundabout onto US 89 / West Division Street
Roundabout - know your exit number before entering
5
302.5 mi into trip|~5h 53m in|US 2; US 89
At end of road, turn left onto US 2; US 89
Navigation decision point
5
378.9 mi into trip|~7h 21m in|Old US 2
At end of road, turn left onto Old US 2
Navigation decision point
Fuel & Cost
Regular Gas
$62.28 one way
$124.57 round trip
$3.96/gal25.4 MPG avg140 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$65.65
$131.30
premium
$4.47
$70.39
$140.77
diesel
$4.80
$75.45
$150.90
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$62
Meals
$25–$50
Total
$87–$112
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 139.8 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $42 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
119.9
1
$41.96
$19.18
Efficient EV
99.9
1
$34.97
$15.98
EV Truck/SUV
159.8
1
$55.94
$25.57
Gas CO2
140 kg
EV CO2
47 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 Jul 17, 2026
Origin
Roundup, MT
Evening
in Roundup on Saturday
Local time
7:20 PM
MDT
Current temp
63°F
Slight Chance Showers And Thunderstorms
NE 5 mph16% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 16 at 9:50PM MDT by NWS Billings MT
Severe Thunderstorm Warning
Severe Thunderstorm Warning issued July 16 at 9:42PM MDT until July 16 at 10:15PM MDT by NWS Billings MT
Destination
Whitefish, MT
Evening
in Whitefish on Saturday
Local time
7:20 PM
MDT
Current temp
61°F
Chance Showers And Thunderstorms then Slight Chance Light Rain
NNW 2 mph28% chanceLive forecast
Special Weather Statement
Special Weather Statement issued July 16 at 9:50PM MDT by NWS Billings MT
Severe Thunderstorm Warning
Severe Thunderstorm Warning issued July 16 at 9:42PM MDT until July 16 at 10:15PM MDT by NWS Billings 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.
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
2 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
7h 55m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Glacier National Park
National Park
A showcase of melting glaciers, alpine meadows, carved valleys, and spectacular lakes. With over 700 miles of trails, Glacier is a paradise for adventurous visitors seeking a landscape steeped in huma...
15 mi from route
~37 min detour
$35
near mile 372.1
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This route is mostly highway, with 89% of the driving on major roadways. You'll encounter a longest stretch of 158.6 miles on US 87, offering extended periods of cruising. The drive transitions from highway to potentially more rural or surface roads after these long stretches. Expect consistent progress on this route, with fewer complexities than a heavily populated or winding path.
89% highway — fuel and pacing are the main things to plan.
41 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 158.6 mi on US 87.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on US 87 and US 2. There are only a few real navigation decisions along the way. The trickiest moment comes around 157.7 miles in.
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 7h 55m, endurance matters. Plan breaks every 2-3 hours. The 19 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 157.7 miles: Roundabout - know your exit number before entering; at 182.3 miles (I 15 Business / Park Drive North): Navigation decision point; at 234.3 miles (US 89 / West Division Street): Roundabout - know your exit number before entering.
The longest stretch is about 158.6 miles on US 87. The full list of main roads is in the Roads section above.
Yes — we found about 5 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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 Whitefish, MT 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. There are 5 rest areas along the route for bathroom stops.
Mostly yes along the main roads, but rural stretches through MT 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 157.7 miles: Roundabout - know your exit number before entering; at 182.3 miles (I 15 Business / Park Drive North): Navigation decision point; at 234.3 miles (US 89 / West Division Street): Roundabout - know your exit number before entering.
Yes — Glacier National Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 7.9 hours each way, a round trip means 15.8 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Whitefish, MT before the return drive.
