This 230.5-mile drive from Casper to Rock Springs, Wyoming, is easily manageable as a single-day trip, taking approximately 4 hours and 13 minutes. You'll primarily navigate the Dwight D. Eisenhower Highway, County Road 308, and US 287, with about 22% of the journey on highways. The estimated fuel cost for this route is around $37. Given its relatively short duration and single recommended stop, it offers a straightforward transition within the Mountain West region. This trip offers a practical way to cover ground between these two Wyoming cities without requiring an overnight stay.
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
115.3 miles from Casper, WY
A natural place for your longest stop of the day
, about 2h 16m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 4h 13m. Total distance: 230.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Expect a turn-heavy local drive on this route, which deviates from pure highway travel. While 22% of the journey utilizes highways, much of the experience involves navigating local roads. The longest uninterrupted stretch you'll encounter is 103.6 miles on the Dwight D. Eisenhower Highway, offering a period of consistent driving before the landscape shifts. The road's personality evolves as you progress, moving from broader highway sections to more localized routes, demanding your attention with frequent changes in direction.
This route has more turning and local-road decision points than a simple highway run.
There are about 25 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Dwight D. Eisenhower Highway is the longest continuous segment at about 103.6 miles.
How Hard Is This Drive?
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.3 miles in.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 4h 13m drive. You will face about 16 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 0.3 miles: Navigation decision point; at 0.9 miles (Bryan Stock Trail): Navigation decision point; at 4.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 16 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
5
0.3 mi into trip|~1m in
Turn right
Navigation decision point
5
0.9 mi into trip|~3m in|Bryan Stock Trail
At end of road, turn right onto Bryan Stock Trail
Navigation decision point
5
4.3 mi into trip|~8m 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
228.5 mi into trip|~4h 9m 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
230.3 mi into trip|~4h 13m in|Edgar Street
Turn left onto Edgar Street
Navigation decision point
Main Roads
Road
Distance
Duration
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
5.1 mi
6m
West Spruce Street
1.5 mi
2m
Bryan Stock Trail
1.1 mi
1m
WY 789
0.6 mi
1m
Longest stretch:
Dwight D. Eisenhower Highway
— 103.6 mi, about 1h 40m
Turn-by-Turn Driving Directions
Step-by-step road directions between Casper, WY and Rock Springs, WY.
1
Start on North Sunlight Drive
0.3 mi·1 min·North Sunlight Drive
2
Turn right
0.1 mi·33 sec
3
Turn right onto East Sunlight Drive
0.5 mi·1 min·East Sunlight Drive
4
At end of road, turn right onto Bryan Stock Trail
1.1 mi·1 min·Bryan Stock Trail
5
Turn right onto US 20; US 26; US 87
0.2 mi·16 sec·East F Street
6
Take the ramp onto US 20; US 26; US 87
2.1 mi·2 min·US 20; US 26; US 87
7
Take the exit
0.3 mi·45 sec
Toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
8
Keep slight left at fork
350 ft·10 sec
9
Turn left onto US 20; US 26
3.0 mi·3 min·US 20; US 26
10
Continue on WY 257
7.3 mi·8 min·Casper West Belt
11
Turn right onto WY 220
64 mi·1 hr 12 min·County Road 308
12
Continue on US 287; WY 789
44 mi·50 min·US 287; WY 789
13
Turn right onto I 80 Bus; US 30 Bus; WY 789
1.5 mi·2 min·West Spruce Street
14
Take the ramp onto WY 789
0.6 mi·1 min·WY 789
15
Merge onto I 80; US 30; WY 789
104 mi·1 hr 40 min·Dwight D. Eisenhower Highway
16
Take the exit
0.5 mi·48 sec
Toward I 80 Business West, US 30 Business West
17
Turn left onto I 80 Business; US 30 Business
0.5 mi·51 sec·9th Street
18
Turn left onto WY 376
0.4 mi·40 sec·South Side Belt Route
19
Turn slight right onto James Drive
230 ft·10 sec·James Drive
20
Turn straight onto James Drive
0.2 mi·24 sec·James Drive
21
Turn left onto Virginia Street
0.2 mi·46 sec·Virginia Street
22
Turn left onto Edgar Street
0.1 mi·22 sec·Edgar Street
23
At end of road, turn right onto Agate Street
422 ft·23 sec·Agate Street
24
Turn left onto Collins Street
84 ft·3 sec·Collins Street
25
Arrive at destination
Collins Street
Trip Plan
With a duration of just over 4 hours, this route offers flexibility for departure. Leaving Casper in the morning allows you to reach Rock Springs by midday, leaving plenty of time for onward travel or activities. Plan for one stop to break up the drive, ensuring you stay refreshed. Keep an eye on your fuel gauge, especially before embarking on the 103.6-mile stretch on the Dwight D. Eisenhower Highway, as services might be spaced out. The $37 fuel cost is a good baseline for budgeting this relatively short journey within Wyoming.
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 115.3 miles from Casper, WY, or about 2h 16m into the drive.
The longest continuous stretch on this route runs about 103.6 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 51 miles or 1h 3m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 115.3 miles or 2h 16m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 31m
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 Casper, 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 Casper, WY
This is one driving day of about 230.5 miles and 4h 13m.
Your first comfortable stop window is around 51 miles from Casper, 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 Dwight D. Eisenhower Highway for about 103.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 115.3 mi from Casper, WY
· 2h 16m into the drive
Place data sourced from public business listings. Hours and availability may vary.
Fuel & Cost
Regular Gas
$36.53 one way
$73.05 round trip
$4.03/gal25.4 MPG avg81 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$38.29
$76.57
premium
$4.53
$41.12
$82.24
diesel
$5.61
$50.89
$101.78
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$37
Meals
$25–$50
Total
$62–$87
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 80.6 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $24 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
69.1
0
$24.20
$11.06
Efficient EV
57.6
0
$20.17
$9.22
EV Truck/SUV
92.2
1
$32.27
$14.75
Gas CO2
81 kg
EV CO2
27 kg (67% less)
Plan for 0 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 as of Apr 15, 2026
Origin
Casper, WY
Night
in Casper on Friday
Local time
11:31 PM
MDT
Current temp
44°F
Unavailable
Live forecast
Destination
Rock Springs, WY
Night
in Rock Springs on Friday
Local time
11:31 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
19 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
4h 13m 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 Casper, WY to Rock Springs, WY covers 230.5 miles and takes about 4h 13m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Dwight D. Eisenhower Highway, County Road 308, US 287. Expect a mix of highway and local road driving.
This is a comfortable same-day trip.
The midpoint is about 115.3 miles from Casper, WY. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $36.53 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 4h 13m drive. You will face about 16 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: at 0.3 miles: Navigation decision point; at 0.9 miles (Bryan Stock Trail): Navigation decision point; at 4.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
The route from Casper, WY to Rock Springs, WY does not surface many named destination signs beyond the main corridor.
