Green River, WY to Ranchester, WY is 402 miles and takes about 6h 58m via Dwight D. Eisenhower Highway and I 25, with a fuel budget near $70 and enough daylight to finish in a day. This trip stays within the Mountain West region, offering a straightforward path through Wyoming. With a recommended one-day drive, it’s a solid option if you're looking to cover ground efficiently. Expect a mix of highway cruising and surface roads as you make your way north.
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
201 miles from Green River, WY
A natural place for your longest stop of the day
, about 3h 32m into the drive
.
Main Roads
Road
Distance
Duration
Dwight D. Eisenhower Highway
119.3 mi
1h 55m
I 25
110.7 mi
1h 44m
WY 220
63.7 mi
1h 12m
US 87
48.4 mi
51m
3rd Street
44.1 mi
50m
Casper West Belt
7.3 mi
8m
US 20
3 mi
3m
West Spruce Street
1.7 mi
2m
Longest stretch:
Dwight D. Eisenhower Highway
— 119.3 mi, about 1h 55m
Traffic on I-80
Hour-of-day weekday pattern from 24 FHWA count stations on your route.
Peak
4 PM
~665 veh/hr typical
· worst 930
Quietest
2 AM
~95 veh/hr
Peak-to-quiet ratio
7×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 103 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Green River, WY and Ranchester, WY.
1
Start on North 1st East
35 ft·6 sec·North 1st East
2
Turn left onto I 80 Bus; US 30 Bus
1.1 mi·2 min·East Flaming Gorge Way
3
Take the ramp onto I 80 Bus; US 30 Bus
0.7 mi·1 min·I 80 Bus; US 30 Bus
Toward I 80 East, US 30 East: Rock Springs
4
Merge onto I 80; US 30
119 mi·1 hr 55 min·Dwight D. Eisenhower Highway
5
Take the exit onto WY 789
0.4 mi·52 sec·WY 789
Toward I 80 Business East, WY 789 North: Rawlins
6
Turn left onto I 80 Bus; US 30 Bus; WY 789
1.7 mi·2 min·West Spruce Street
7
Turn left onto US 287; WY 789
44 mi·50 min·3rd Street
8
Continue on WY 220
64 mi·1 hr 12 min·WY 220
9
Turn left onto WY 257
7.3 mi·8 min·Casper West Belt
10
Continue on US 20; US 26
3.0 mi·3 min·US 20; US 26
11
Turn left
0.4 mi·50 sec
Toward I 25 North, US 87 North: Midwest
12
Merge onto I 25; US 87
111 mi·1 hr 44 min·I 25; US 87
13
Keep slight left at fork onto US 87
48 mi·51 min·US 87
Toward I 90 West, US 87 North: Sheridan
14
Take the exit onto I 90; US 87
0.4 mi·1 min·I 90; US 87
Toward US 14 West: Ranchester-Dayton, Greybull-Lovell, Yellowstone-Teton National Parks
15
Turn left onto US 14
0.9 mi·1 min·US 14
16
Arrive at destination
US 14
Trip Plan
Since this drive is under 7 hours, you can comfortably complete it in a single day. Aim to depart Green River in the morning to maximize daylight hours and allow ample time for the drive. Your fuel cost is estimated at $70, so ensure your tank is full before leaving. With only one recommended stop, you can be flexible with your breaks, perhaps pausing around the halfway point for a quick stretch. Keep an eye on your fuel gauge, especially as you approach Ranchester, as services can be spread out in this region.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 201 miles from Green River, WY, or about 3h 32m into the drive.
The longest continuous stretch on this route runs about 119.3 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 88 miles or 1h 28m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 201 miles or 3h 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 5h 54m
Traffic, exits, and arrival timing usually matter more near Ranchester, WY than in the middle of the route.
Before You Leave
+
Open the route before leaving Green River, 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 Green River, WY
This is one driving day of about 402 miles and 6h 58m.
Your first comfortable stop window is around 88 miles from Green River, 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 119.3 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 12
5 decision points cluster between mile 0 and 400.7 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0 mi into trip|~0m in|I 80 Bus; US 30 Bus / East Flaming Gorge Way
Turn left onto I 80 Bus; US 30 Bus / East Flaming Gorge Way
Navigation decision point
5
121 mi into trip|~2h in|WY 789
Take the exit onto WY 789 toward I 80 Business East, WY 789 North: Rawlins
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 80 Business East, WY 789 North: Rawlin...
5
241.1 mi into trip|~4h 19m in
Turn left toward I 25 North, US 87 North: Midwest
Multiple destination signs - pick the right one
Toward I 25 North, US 87 North: Midwest
6
352.2 mi into trip|~6h 4m in|US 87
Keep slight left at fork onto US 87 toward I 90 West, US 87 North: Sheridan
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward I 90 West, US 87 North: Sheridan
5
400.7 mi into trip|~6h 56m in|I 90; US 87
Take the exit onto I 90; US 87 toward US 14 West: Ranchester-Dayton, Greybull-Lovell, Yellowstone-Teton National Parks
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward US 14 West: Ranchester-Dayton, Greybull-...
Fuel & Cost
Regular Gas
$69.72 one way
$139.43 round trip
$4.41/gal25.4 MPG avg141 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.61
$72.91
$145.83
premium
$4.95
$78.34
$156.69
diesel
$5.60
$88.61
$177.23
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$70
Meals
$25–$50
Total
$95–$120
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 140.7 kg one way.
Prices: EIA weekly data, 2026-08-31.
Driving Electric?
About $42 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
120.6
1
$42.21
$19.30
Efficient EV
100.5
1
$35.18
$16.08
EV Truck/SUV
160.8
2
$56.28
$25.73
Gas CO2
141 kg
EV CO2
47 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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 Sep 1, 2026
Origin
Green River, WY
Night
in Green River on Tuesday
Local time
9:45 PM
MDT
Current temp
79°F
Unavailable
Live forecast
Destination
Ranchester, WY
Night
in Ranchester on Tuesday
Local time
9:45 PM
MDT
Current temp
82°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
3 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
6h 58m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
This 402-mile drive is primarily on highways, with 57% of the route utilizing major roads like the Dwight D. Eisenhower Highway and I 25. You'll encounter a longest stretch of 119.3 miles on the Dwight D. Eisenhower Highway before transitioning to surface roads. The profile suggests a mixed highway and surface road experience, so be prepared for changes in speed limits and road conditions.
57% highway, the rest on surface roads — varied driving throughout.
16 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 119.3 mi on Dwight D. Eisenhower Highway.
How Hard Is This Drive?
4/10
This route mixes highway mileage with some local-road sections near the start or finish. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near I 80 Bus; US 30 Bus / East Flaming Gorge Way.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
The route itself is not hard, but at 6h 58m, endurance matters. Plan breaks every 2-3 hours. The 12 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: near the start (I 80 Bus; US 30 Bus / East Flaming Gorge Way): Navigation decision point; at 121 miles (WY 789): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 241.1 miles: Multiple destination signs - pick the right one.
The longest stretch is about 119.3 miles on Dwight D. Eisenhower 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.
It helps. This is a long drive, so arriving tired and in the dark compounds. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Ranchester, WY before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
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: near the start (I 80 Bus; US 30 Bus / East Flaming Gorge Way): Navigation decision point; at 121 miles (WY 789): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 241.1 miles: Multiple destination signs - pick the right one.
Not recommended in a single day. At 7.0 hours each way, a round trip means 14.0 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Ranchester, WY before the return drive.
