Origin
Casper, WY
Evening in Casper on Saturday
Local time
8:47 PM
MDT
Current temp
44°F
Unavailable
Live forecast
Trip from Casper, WY to Mills, WY
Compiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 19, 2026 · Editorial standards
Drive Time
12m
Distance
6.2 mi
10 km
Drive Score
6/10
Good drive
Same Day?
Yes, doable
Fuel Cost
$1
one way
EV Charging
Unknown
Best Time to Leave
4 AM
0h 12m
★
6 AM
0h 13m
8 AM
0h 15m
10 AM
0h 14m
12 PM
0h 13m
3 PM
0h 14m
5 PM
0h 15m
8 PM
0h 12m
★
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Casper, WY
Taryn Elliott
Mills, WY
Dan Stone
Trip Overview
Casper to Mills is 6.2 miles and takes about 12m via East 1st Street, with a fuel budget near $1 and enough daylight to finish in a day. This short trip stays within Wyoming, making it a quick hop between two points in the Mountain West region. Given its brief duration, this route is best suited for a same-day drive without the need for an overnight stay. It’s a practical, turn-heavy local drive, so don’t expect sweeping vistas, but rather a straightforward connection between locations.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| East 1st Street | 2.1 mi | 3m |
| Bryan Stock Trail | 1.1 mi | 1m |
| East Yellowstone Highway | 1 mi | 1m |
| East Sunlight Drive | 0.5 mi | 1m |
| West Yellowstone Highway | 0.4 mi | <1m |
| 1st Street | 0.3 mi | <1m |
| North Sunlight Drive | 0.3 mi | 1m |
| North Beverly Street | 0.2 mi | <1m |
Longest stretch:
East 1st Street
— 2.1 mi, about 3m
Turn-by-Turn Driving Directions
Step-by-step road directions between Casper, WY and Mills, 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
Continue on I 25 Business
0.2 mi
·
24 sec
·
North Beverly Street
6
Turn right onto I 25 Business; US 20 Business; US 26 Business; US 87 Business
1.0 mi
·
1 min
·
East Yellowstone Highway
7
Turn slight right onto I 25 Business; US 20 Business; US 26 Business; US 87 Business
2.1 mi
·
3 min
·
East 1st Street
8
Continue on US 20 Business; US 26 Business
0.4 mi
·
44 sec
·
West Yellowstone Highway
9
Turn left onto Van Horn Avenue
0.2 mi
·
28 sec
·
Van Horn Avenue
10
Continue on 1st Street
0.3 mi
·
45 sec
·
1st Street
11
Arrive at destination
1st Street
Heads-up: tricky spots
4 of 44 decision points cluster between mile 0.3 and 5.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
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
3
2.2 mi into trip
|
~5m in
|
I 25 Business; US 20 Business; US 26 Business; US 87 Business / East Yellowstone Highway
Turn right onto I 25 Business; US 20 Business; US 26 Business; US 87 Business / East Yellowstone Highway
Navigation decision point
4
5.7 mi into trip
|
~11m in
|
Van Horn Avenue
Turn left onto Van Horn Avenue
Navigation decision point
Fuel & Cost
Regular Gas
$0.98 one way
$1.96 round trip
$4.03/gal
25.4 MPG avg
2 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.22 | $1.03 | $2.06 |
| premium | $4.53 | $1.11 | $2.21 |
| diesel | $5.61 | $1.37 | $2.74 |
No toll roads detected on this route.
Drive Cost (one way)
Fuel
$1
Estimated CO2 emission: 2.2 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $1 in charging · 0 stops · 50% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 1.9 | 0 | $0.65 | $0.30 |
| Efficient EV | 1.6 | 0 | $0.54 | $0.25 |
| EV Truck/SUV | 2.5 | 0 | $0.87 | $0.40 |
Gas CO2
2 kg
EV CO2
1 kg (50% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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
Mills, WY
Evening in Mills on Saturday
Local time
8:47 PM
MDT
Current temp
45°F
Unavailable
Live forecast
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
1 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
12m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
What kind of drive is this?
This is a turn-heavy local drive, with no highway driving involved (0% highway share). You'll navigate through Casper and into Mills primarily using East 1st Street, Bryan Stock Trail, and East Yellowstone Highway. The longest uninterrupted stretch you'll encounter is 2.1 miles on East 1st Street. Expect a dynamic driving experience with frequent turns rather than long, straightaways. The road character is that of a local connection, designed for efficient travel within the immediate area.
Only 0% highway — the rest is turn-by-turn surface driving.
11 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 2.1 mi on East 1st Street.
How Hard Is This Drive?
3/10
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 Effort
3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 12m drive. You will face about 4 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 2.2 miles (I 25 Business; US 20 Business; US 26 Business; US 87 Business / East Yellowstone Highway): Navigation decision point.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 12m. Total distance: 6.2 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
12m drive, comfortable solo distance.
EV Driver
0 DC fast chargers along the route. Coverage: unknown.
First-Time Driver
Mostly highway driving (0%). Straightforward navigation.
Scenic Drive
Mostly surface roads route profile.
Frequently Asked Questions
The longest stretch is about 2.1 miles on East 1st Street. The full list of main roads is in the Roads section above.
Yes — we found about 1 rest area or service plaza 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.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
Mostly yes along the main roads, but rural stretches through WY 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 0.3 miles: Navigation decision point; at 0.9 miles (Bryan Stock Trail): Navigation decision point; at 2.2 miles (I 25 Business; US 20 Business; US 26 Business; US 87 Business / East Yellowstone Highway): Navigation decision point.
Yes. A round trip is manageable in a single day if you plan a break at Mills, WY before heading back.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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