How far is Rock Springs, WY from Casper, WY?
Fastest route
The distance between Rock Springs, Wyoming 82901 and Casper, Wyoming is approximately 229 miles (369 kilometers). The fastest route is currently via I-80 E and WY-220 E, with an estimated travel time of 3 hours and 22 minutes.
Directions
- Start by getting on I-80 E/US-30 E from S Side Belt Route and 9th St.
- Head north on Agate St toward Collins St.
- Continue straight onto Edgar St.
- Turn right onto Virginia St.
- Turn left onto S Side Belt Route.
- Turn right onto 9th St (signs for US-30/Interstate 80).
- Turn right to merge onto I-80 E/US-30 E toward Rawlins.
- Follow I-80 E/US-30 E and WY-789 N to WY-220 E in Carbon County.
- Merge onto I-80 E/US-30 E.
- Take exit 211 for I-80BL/WY-789 N toward US-287/Rawlins.
- Turn left onto I-80BL/WY-789 N.
- Turn left onto US-287 N/WY-789 N/3rd St (signs for Casper-Lander).
- Continue to follow US-287 N/WY-789 N.
- Continue on WY-220 E to Mills.
- Turn left onto State Hwy 257/W Belt Lp.
- Continue on US-20 E/US-26.
- Take I-25 S/US-87 S to N Beverly St in Casper.
- Continue onto US-20 E/US-26.
- Use the right lane to merge onto I-25 S/US-87 S via the ramp to Casper/Cheyenne.
- Take exit 186 toward US-20 E/US-26 E/US-87 S/N Beverly St/Bryan Stock Trail.
- Continue onto US-87/East E Street.
- Turn right onto N Beverly St.
- Continue straight to stay on N Beverly St.
Tips & Suggestions
- 🚗 Leave early to avoid heavy traffic and make the most of your journey.
- ⛽ Plan your fuel stops along the route to ensure you don't run out of gas.
- 🍴 Pack some snacks or plan meal stops along the way for refreshments.
- 🚧 Keep an eye out for construction zones or roadwork and follow any detour signs.
- 🛣️ Stay attentive to the road signs and follow the indicated highways and exits.
- 📱 Use a GPS navigation system or a reliable map application for real-time guidance.
- 📞 In case of emergencies or breakdowns, have the contact information of local roadside assistance services on hand.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 03h 56m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Carbon County, Wyoming, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance T-storms
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Rock Springs and Casper.
Turn-by-Turn Driving Directions
Step-by-step road directions between Rock Springs and Casper.
-
1
Start on Collins Street
26 m · 7 sec · Collins Street
-
2
Turn right onto Agate Street
129 m · 19 sec · Agate Street
-
3
At the end of the road, turn left onto Edgar Street
789 ft · 26 sec · Edgar Street
-
4
Turn right onto Virginia Street
905 ft · 40 sec · Virginia Street
-
5
At the end of the road, turn right onto James Drive
977 ft · 33 sec · James Drive
-
6
At the end of the road, turn left onto South Side Belt Route
2190 ft · 48 sec · South Side Belt Route
-
7
Turn right onto 9th Street
2182 ft · 38 sec · 9th Street
-
8
Take the ramp right
1916 ft · 30 sec
-
9
Merge slight left onto Dwight D. Eisenhower Highway
103.9 mi · 1 hr 41 min · Dwight D. Eisenhower Highway
-
10
Take the exit slight right toward I 80 Business East, WY 789 North: Rawlins
1997 ft · 52 sec
-
11
Turn left onto West Spruce Street
1.7 mi · 3 min · West Spruce Street
-
12
Turn left onto 3rd Street
44.1 mi · 51 min · 3rd Street
-
13
Continue straight
63.7 mi · 1 hr 13 min
-
14
Turn left onto Casper West Belt
7.3 mi · 9 min · Casper West Belt
-
15
Continue straight
2.7 mi · 3 min
-
16
Take the exit right
2.5 mi · 4 min
-
17
Take the exit slight right toward US 20 East, US 26 East, US 87 South: North Beverly Street, Bryan Stock Trail
1755 ft · 41 sec
-
18
At the end of the road, turn left onto Bryan Stock Trail
1.1 mi · 2 min · Bryan Stock Trail
-
19
Turn left onto East Sunlight Drive
1.5 km · 4 min · East Sunlight Drive
-
20
Arrive at your destination
0 m · 1 sec · North Sunlight Drive
Car Route Details
A richer read on the saved driving route between Rock Springs and Casper.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Dwight D. Eisenhower Highway
Merge slight left onto Dwight D. Eisenhower Highway
104 mi · 01h 41m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny then Slight Chance T-storms leaving Rock Springs and Mostly Sunny near Casper.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Rock Springs to Casper?
The road trip is about 229.8 miles (369.8 km) and usually takes 03h 56m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Rawlins is a useful midpoint, sitting about 115.1 miles from Rock Springs and 114.7 miles from Casper.
How much longer is the road route than the straight-line distance?
The direct path is about 172.2 miles (277.2 km), while the road route adds roughly 57.6 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 9:08 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $31.57 one way or $63.14 round trip. Estimated CO2 is about 72.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance T-storms around Rock Springs and Mostly Sunny near Casper.
Stop Ideas Near Rawlins
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Tully Park
City Of Rawlins Public Works Department
City Hall
Key Club Park
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Rawlins.
Flight Path Map
This map shows the direct air route between Rock Springs and Casper. Straight-line distance: 172.24 mi (277.19 km).
#1 Rock Springs
City in Sweetwater County, Wyoming, United States
| Population | 22,943 |
| Coordinates | 41.5874600, -109.2029000 |
| Altitude | 1947 |
| Country | United States |
#2 Casper
The most populous city in Natrona County, Wyoming.
| Population | 58,498 |
| Coordinates | 42.8666300, -106.3130800 |
| Altitude | 1560 |
| Country | United States |
End: North Sunlight Drive (-106.309604, 42.868632)
Estimated Travel Time
Distance: 370 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 39m |
| 40 mph (64.37 km/h) | 05h 44m |
| 50 mph (80.47 km/h) | 04h 35m |
| 60 mph (96.56 km/h) | 03h 49m |
| 70 mph (112.65 km/h) | 03h 16m |
| 80 mph (129 km/h) | 02h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $31.57 | $63.14 |
| Mid-grade | $4.23 | $34.31 | $68.63 |
| Premium | $4.55 | $36.89 | $73.78 |
| Diesel | $5.41 | $43.89 | $87.78 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Wyoming · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.