Casper to Fort Washakie is 155 miles and takes about 3 hours and 7 minutes via US 26, with a fuel budget near $25 and enough daylight to finish in a day. This trip stays within Wyoming, connecting the Mountain West region. Expect a drive primarily on surface roads, offering a straightforward path from one point to another. With a single recommended stop and a manageable distance, this route is well-suited for a single-day excursion.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
77.5 miles from Casper, WY
A natural place for your longest stop of the day
, about 1h 32m into the drive
.
Main Roads
Road
Distance
Duration
West Yellowstone Highway
94.3 mi
1h 47m
US 26
23.3 mi
26m
17 Mile Road
17.9 mi
20m
Ethete Road
5.6 mi
9m
US 20
5.1 mi
6m
Rendezvous Road
2.9 mi
3m
Blue Sky Highway
2.1 mi
3m
Bryan Stock Trail
1.1 mi
1m
Longest stretch:
West Yellowstone Highway
— 94.3 mi, about 1h 47m
Turn-by-Turn Driving Directions
Step-by-step road directions between Casper, WY and Fort Washakie, 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
Turn right onto US 20; US 26
94 mi·1 hr 47 min·West Yellowstone Highway
11
Continue on US 26; WY 789
18 mi·20 min·US 26; WY 789
12
Continue on US 26; WY 789
5.6 mi·6 min·US 26; WY 789
Use the straight lane.
13
Turn right onto Rendezvous Road
2.9 mi·3 min·Rendezvous Road
14
Continue on 17 Mile Road
18 mi·20 min·17 Mile Road
15
At end of road, turn right onto WY 132
2.1 mi·3 min·Blue Sky Highway
16
Turn left onto Ethete Road
5.6 mi·9 min·Ethete Road
17
Turn right onto US 287
0.9 mi·1 min·US 287
18
Turn left onto North Fork Road
449 ft·20 sec·North Fork Road
19
Turn right onto Black Coal Drive
0.2 mi·46 sec·Black Coal Drive
20
Turn right onto 2nd Street
25 ft·1 sec·2nd Street
21
Arrive at destination
2nd Street
Trip Plan
For this 155-mile drive, leaving Casper in the morning is ideal to maximize daylight. Since the drive is under 4 hours, you can be flexible with your timing. Plan for one stop along the way, perhaps around the halfway point, to stretch your legs. Keep an eye on your fuel gauge, especially as you move onto the surface roads where stations may be less frequent. The fuel cost is estimated at $25, so factoring that into your budget is wise.
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 77.5 miles from Casper, WY, or about 1h 32m into the drive.
The longest continuous stretch on this route runs about 94.3 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 34 miles or 43m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 77.5 miles or 1h 32m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 29m
Traffic, exits, and arrival timing usually matter more near Fort Washakie, 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 155 miles and 3h 7m.
Your first comfortable stop window is around 34 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 West Yellowstone Highway for about 94.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 13
5 decision points cluster between mile 0.3 and 7.7 — 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
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...
4
4.7 mi into trip|~9m in
Keep slight left at fork
Highway fork - watch signs carefully
4
7.7 mi into trip|~13m in|US 20; US 26 / West Yellowstone Highway
Turn right onto US 20; US 26 / West Yellowstone Highway
Navigation decision point
Fuel & Cost
Regular Gas
$24.56 one way
$49.12 round trip
$4.03/gal25.4 MPG avg54 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.22
$25.75
$51.49
premium
$4.53
$27.65
$55.30
diesel
$5.61
$34.22
$68.44
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$25
Meals
$25–$50
Total
$50–$75
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 54.2 kg one way.
Prices: EIA weekly data, 2026-04-13.
EV Charging Along Route
3 DC fast chargers
· Coverage: good
Hat Six Travel Center - Tesla Supercharger
Evansville, WY
Tesla
8 DCFC
Target T0164 (Casper, WY)
Casper, WY
Electrify America
4 DCFC
Flying J 758
Casper, WY
eVgo Network
4 DCFC
Tesla: 1
Electrify America: 1
eVgo Network: 1
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $16 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
46.5
0
$16.28
$7.44
Efficient EV
38.8
0
$13.56
$6.20
EV Truck/SUV
62
0
$21.70
$9.92
Gas CO2
54 kg
EV CO2
18 kg (67% 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.
Forecast as of Apr 15, 2026
Origin
Casper, WY
Night
in Casper on Saturday
Local time
10:45 PM
MDT
Current temp
44°F
Unavailable
Live forecast
Destination
Fort Washakie, WY
Night
in Fort Washakie on Saturday
Local time
10:45 PM
MDT
Current temp
70°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
26 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
3h 7m 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.
More Details
What kind of drive is this?
You'll spend about 19% of this 155-mile trip on highways, with the longest continuous highway stretch being 94.3 miles on West Yellowstone Highway. After that, the route transitions to surface roads. Be prepared for mostly rural cruising for the majority of this drive, with fewer services and more open space.
Only 19% highway — the rest is turn-by-turn surface driving.
21 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 94.3 mi on West Yellowstone Highway.
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 Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 3h 7m drive. You will face about 13 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.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 3h 7m. Total distance: 155 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 94.3 miles on West Yellowstone Highway. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
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 4.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Possible but tiring. At 3.1 hours each way, an in-and-out day trip would put you behind the wheel for 6.2 hours — manageable with a long break at Fort Washakie, WY, but most travelers stay overnight.
