Origin
Buffalo, WY
Afternoon in Buffalo on Thursday
Local time
1:17 PM
MDT
Current temp
69°F
Unavailable
Live forecast
Trip from Buffalo, WY to Rock Springs, WY
Last recalculated Apr 16, 2026
Drive Time
5h 49m
Distance
335.9 mi
541 km
Drive Score
10/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$53
one way
EV Charging
Unknown
Best Time to Leave
4 AM
5h 36m
★
6 AM
5h 49m
8 AM
6h 15m
10 AM
5h 58m
12 PM
5h 56m
3 PM
6h 0m
5 PM
6h 14m
8 PM
5h 41m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Buffalo, WY
Wikimedia Commons
Rock Springs, WY
Wikimedia Commons
Trip Overview
The drive from Buffalo, WY to Rock Springs, WY covers 335.9 miles and takes about 5h 49m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 25, Dwight D. Eisenhower Highway, County Road 308 for much of the mileage, and the overall profile is mixed drive. The longest uninterrupted segment is about 108.1 miles on I 25. At current regular gas prices, budget about $53.23 one way before food or hotel costs.
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
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
167.9 miles from Buffalo, WY
A natural place for your longest stop of the day , about 2h 51m into the drive .
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 5h 49m. Total distance: 335.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 49m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (46%). Straightforward navigation.
Drive Character
The drive from Buffalo, WY to Rock Springs, WY covers 335.9 miles and takes about 5h 49m, using a mix of highways and local roads.
Expect a mix of faster highway mileage and slower local approaches near the beginning or end.
There are about 22 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 25 is the longest continuous segment at about 108.1 miles.
How Hard Is This Drive?
This route mixes highway mileage with some local-road sections near the start or finish. There are only a few real navigation decisions along the way. The trickiest moment comes around 1.2 miles in.
Driving Effort
4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 5h 49m drive. You will face about 17 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 1.2 miles: Multiple destination signs - pick the right one; at 109.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 333.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 17 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
5
1.2 mi into trip
|
~1m in
Take the ramp toward I 25 South, US 87 South: Casper
Multiple destination signs - pick the right one
Toward I 25 South, US 87 South: Casper
5
109.9 mi into trip
|
~1h 44m in
Take the exit toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward US 20 West, US 26 West, WY 220 West: Sho...
5
333.9 mi into trip
|
~5h 44m in
Take the exit toward I 80 Business West, US 30 Business West
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 80 Business West, US 30 Business West
5
335.6 mi into trip
|
~5h 48m in
|
Edgar Street
Turn left onto Edgar Street
Navigation decision point
5
335.8 mi into trip
|
~5h 48m in
|
Agate Street
At end of road, turn right onto Agate 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 Buffalo, WY to Rock Springs, WY, road signs begin pointing toward Port Of Entry along the way.
Port Of Entry
109.9 mi in
|
~1h 44m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 25 | 108.1 mi | 1h 41m |
| Dwight D. Eisenhower Highway | 103.6 mi | 1h 40m |
| County Road 308 | 63.7 mi | 1h 12m |
| US 287 | 44.1 mi | 50m |
| Casper West Belt | 7.3 mi | 8m |
| US 20 | 2.7 mi | 3m |
| West Spruce Street | 1.5 mi | 2m |
| North Main Street | 1.2 mi | 1m |
Longest stretch:
I 25
— 108.1 mi, about 1h 41m
Turn-by-Turn Driving Directions
Step-by-step road directions between Buffalo, WY and Rock Springs, WY.
1
Start on I 25 Bus; US 16; US 87 Bus
1.2 mi
·
1 min
·
North Main Street
Use the straight lane.
2
Take the ramp
0.5 mi
·
1 min
Toward I 25 South, US 87 South: Casper
3
Merge onto I 25; US 87
108 mi
·
1 hr 41 min
·
I 25; US 87
4
Take the exit
0.3 mi
·
42 sec
Toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
5
Keep slight left at fork
0.1 mi
·
17 sec
6
Turn right onto US 20; US 26
2.7 mi
·
3 min
·
US 20; US 26
7
Continue on WY 257
7.3 mi
·
8 min
·
Casper West Belt
8
Turn right onto WY 220
64 mi
·
1 hr 12 min
·
County Road 308
9
Continue on US 287; WY 789
44 mi
·
50 min
·
US 287; WY 789
10
Turn right onto I 80 Bus; US 30 Bus; WY 789
1.5 mi
·
2 min
·
West Spruce Street
11
Take the ramp onto WY 789
0.6 mi
·
1 min
·
WY 789
12
Merge onto I 80; US 30; WY 789
104 mi
·
1 hr 40 min
·
Dwight D. Eisenhower Highway
13
Take the exit
0.5 mi
·
48 sec
Toward I 80 Business West, US 30 Business West
14
Turn left onto I 80 Business; US 30 Business
0.5 mi
·
51 sec
·
9th Street
15
Turn left onto WY 376
0.4 mi
·
40 sec
·
South Side Belt Route
16
Turn slight right onto James Drive
230 ft
·
10 sec
·
James Drive
17
Turn straight onto James Drive
0.2 mi
·
24 sec
·
James Drive
18
Turn left onto Virginia Street
0.2 mi
·
46 sec
·
Virginia Street
19
Turn left onto Edgar Street
0.1 mi
·
22 sec
·
Edgar Street
20
At end of road, turn right onto Agate Street
422 ft
·
23 sec
·
Agate Street
21
Turn left onto Collins Street
84 ft
·
3 sec
·
Collins Street
22
Arrive at destination
Collins Street
Trip Plan
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 167.9 miles from Buffalo, WY, or about 2h 51m into the drive.
The longest continuous stretch on this route runs about 108.1 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 74 miles or 1h 10m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 167.9 miles or 2h 51m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 48m
Traffic, exits, and arrival timing usually matter more near Rock Springs, WY than in the middle of the route.
Before You Leave
+
Open the route before leaving Buffalo, WY 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.
Day 1
Settle into the route from Buffalo, WY
This is one driving day of about 335.9 miles and 5h 49m.
Your first comfortable stop window is around 74 miles from Buffalo, WY.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 25 for about 108.1 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 167.9 mi from Buffalo, WY · 2h 51m into the drive
Mid-route town
Meal stop
168 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 74 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 167.9 miles from Buffalo, WY, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 25 if your tank is already low. That segment runs about 108.1 miles.
Arriving in Rock Springs, WY
The final approach into Rock Springs, WY 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 Rock Springs, WY.
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
$53.23 one way
$106.46 round trip
$4.03/gal
25.4 MPG avg
118 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.22 | $55.79 | $111.59 |
| premium | $4.53 | $59.92 | $119.84 |
| diesel | $5.61 | $74.16 | $148.32 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$53
Meals
$25–$50
Total
$78–$103
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 117.5 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $35 in charging · 1 stop · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 100.8 | 1 | $35.27 | $16.12 |
| Efficient EV | 84 | 0 | $29.39 | $13.44 |
| EV Truck/SUV | 134.4 | 1 | $47.03 | $21.50 |
Gas CO2
118 kg
EV CO2
39 kg (67% 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
Rock Springs, WY
Afternoon in Rock Springs on Thursday
Local time
1:17 PM
MDT
Current temp
63°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.
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
6 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
5h 49m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Buffalo, WY to Rock Springs, WY covers 335.9 miles and takes about 5h 49m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 25, Dwight D. Eisenhower Highway, County Road 308. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 167.9 miles from Buffalo, WY. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $53.23 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a straightforward 5h 49m drive. You will face about 17 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: at 1.2 miles: Multiple destination signs - pick the right one; at 109.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 333.9 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
On the drive from Buffalo, WY to Rock Springs, WY, road signs begin pointing toward Port Of Entry along the way.
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