How far is Mills, WY from Rock Springs, WY?
The driving distance from Mills, WY to Rock Springs, WY is about 222.4 miles (357.9 km), with a travel time of about 03h 48m by car.
- The straight-line flight distance is about 169 miles (272 km).
- For a round trip, plan for roughly 07h 37m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
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 48m.
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.
Showers And Thunderstorms Likely
Sunny
Driving Route Map
The map below follows the saved road route between Mills and Rock Springs.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mills and Rock Springs.
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1
Start on 1st Street
956 ft · 31 sec · 1st Street
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2
At the end of the road, turn left onto Southwest Wyoming Boulevard
1.3 mi · 2 min · Southwest Wyoming Boulevard
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3
Turn right onto CY Avenue
2.4 mi · 4 min · CY Avenue
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4
Continue on Highway 220
3 mi · 5 min · Highway 220
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5
Continue on County Road 308
63.7 mi · 1 hr 12 min · County Road 308
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6
Continue straight
44.1 mi · 51 min
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7
Turn right onto West Spruce Street
1.5 mi · 2 min · West Spruce Street
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8
Take the ramp right
1 km · 1 min
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9
Merge slight left onto Dwight D. Eisenhower Highway
103.6 mi · 1 hr 40 min · Dwight D. Eisenhower Highway
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10
Take the exit slight right toward I 80 Business West, US 30 Business West
2755 ft · 48 sec
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11
Turn left onto 9th Street
2579 ft · 51 sec · 9th Street
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12
Turn left onto South Side Belt Route
2032 ft · 41 sec · South Side Belt Route
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13
Turn slight right
70 m · 10 sec
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14
Turn straight onto James Drive
813 ft · 25 sec · James Drive
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15
Turn left onto Virginia Street
905 ft · 47 sec · Virginia Street
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16
Turn left onto Edgar Street
789 ft · 22 sec · Edgar Street
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17
At the end of the road, turn right onto Agate Street
129 m · 24 sec · Agate Street
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18
Turn left onto Collins Street
26 m · 4 sec · Collins Street
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19
Arrive at your destination
0 m · 1 sec · Collins Street
Car Route Details
A richer read on the saved driving route between Mills and Rock Springs.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Dwight D. Eisenhower Highway
Merge slight left onto Dwight D. Eisenhower Highway
104 mi · 01h 40m
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.
Showers And Thunderstorms Likely leaving Mills and Sunny near Rock Springs.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mills to Rock Springs?
The road trip is about 222.4 miles (357.9 km) and usually takes 03h 48m 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 111.1 miles from Mills and 111.3 miles from Rock Springs.
How much longer is the road route than the straight-line distance?
The direct path is about 169 miles (272 km), while the road route adds roughly 53.4 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 9:22 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $30.56 one way or $61.12 round trip. Estimated CO2 is about 69.8 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around Mills and Sunny near Rock Springs.
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 Mills and Rock Springs. Straight-line distance: 169.02 mi (272.01 km).
#1 Mills
Town in Wyoming, United States
| Population | 4,077 |
| Coordinates | 42.8405200, -106.3658600 |
| Altitude | 1562 |
| Country | United States |
#2 Rock Springs
City in Sweetwater County, Wyoming, United States
| Population | 22,943 |
| Coordinates | 41.5874600, -109.2029000 |
| Altitude | 1947 |
| Country | United States |
End: Collins Street (-109.202964, 41.587676)
Estimated Travel Time
Distance: 358 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 24m |
| 40 mph (64.37 km/h) | 05h 33m |
| 50 mph (80.47 km/h) | 04h 26m |
| 60 mph (96.56 km/h) | 03h 42m |
| 70 mph (112.65 km/h) | 03h 10m |
| 80 mph (129 km/h) | 02h 46m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $30.56 | $61.12 |
| Mid-grade | $4.23 | $33.21 | $66.43 |
| Premium | $4.55 | $35.71 | $71.42 |
| Diesel | $5.41 | $42.48 | $84.97 |
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 · May 31, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.