Trip from Green River, WY to Casper, WY

Last recalculated Apr 16, 2026

Drive Time

4h 28m

Distance

245.8 mi

396 km

Drive Score

9/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$39

one way

EV Charging

Unknown

Best Time to Leave

Save up to 40 min

4 AM

4h 16m ★

6 AM

4h 29m

8 AM

4h 56m

10 AM

4h 38m

12 PM

4h 36m

3 PM

4h 40m

5 PM

4h 54m

8 PM

4h 21m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly

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Trip Overview

The drive from Green River, WY to Casper, WY covers 245.8 miles and takes about 4h 28m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.

The route leans on Dwight D. Eisenhower Highway, WY 220, 3rd Street for much of the mileage, and the overall profile is turn-heavy local drive. The longest uninterrupted segment is about 119.3 miles on Dwight D. Eisenhower Highway. At current regular gas prices, budget about $38.95 one way before food or hotel costs.

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

122.9 miles from Green River, WY

A natural place for your longest stop of the day , about 2h 3m into the drive .

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 4h 28m. Total distance: 245.8 miles.

Family Friendly

Moderate complexity with 1 natural rest stops along the way.

Solo Traveler

4h 28m drive, comfortable solo distance.

First-Time Driver

Mostly highway driving (28%). Straightforward navigation.

Scenic Drive

Turn-heavy local drive route profile.

Drive Character

Expect a 4h 28m drive with frequent turns across 245.8 miles of local and secondary roads.

This route has more turning and local-road decision points than a simple highway run.

There are about 15 navigation steps in the underlying route data, so the final approach matters more than the middle miles.

Dwight D. Eisenhower Highway is the longest continuous segment at about 119.3 miles.

How Hard Is This Drive?

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 early in the drive near I 80 Bus; US 30 Bus / East Flaming Gorge Way.

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 4h 28m drive. You will face about 11 decision points, but nothing that requires special attention if you follow navigation.

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 1.1 miles (I 80 Bus; US 30 Bus): Multiple destination signs - pick the right one; at 121 miles (WY 789): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.

Critical Maneuvers

5 of 11 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

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

4

1.1 mi into trip | ~2m in | I 80 Bus; US 30 Bus

Take the ramp onto I 80 Bus; US 30 Bus toward I 80 East, US 30 East: Rock Springs

Multiple destination signs - pick the right one

Toward I 80 East, US 30 East: Rock Springs

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...

4

240.9 mi into trip | ~4h 19m in

Take the exit

Exit ramp - move to the correct lane early

5

243.4 mi into trip | ~4h 22m in | US 20; US 26; US 87

Take the exit onto US 20; US 26; US 87 toward US 20 East, US 26 East, US 87 South: North Beverly Street, Bryan Stock Trail

Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one

Toward US 20 East, US 26 East, US 87 South: Nor...

Main Roads

Road	Distance	Duration
Dwight D. Eisenhower Highway	119.3 mi	1h 55m
WY 220	63.7 mi	1h 12m
3rd Street	44.1 mi	50m
Casper West Belt	7.3 mi	8m
US 20	3.1 mi	3m
West Spruce Street	1.7 mi	2m
Bryan Stock Trail	1.1 mi	2m
East Flaming Gorge Way	1.1 mi	2m

Longest stretch: Dwight D. Eisenhower Highway — 119.3 mi, about 1h 55m

Turn-by-Turn Driving Directions

Step-by-step road directions between Green River, WY and Casper, 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

2.7 mi · 3 min · US 20; US 26

11

Take the exit

2.5 mi · 3 min

12

Take the exit onto US 20; US 26; US 87

0.3 mi · 41 sec · US 20; US 26; US 87

Toward US 20 East, US 26 East, US 87 South: North Beverly Street, Bryan Stock Trail

13

At end of road, turn left onto I 25 Business

1.1 mi · 2 min · Bryan Stock Trail

14

Turn left onto East Sunlight Drive

0.9 mi · 3 min · East Sunlight Drive

15

Arrive at destination

North Sunlight Drive

Trip Plan

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 122.9 miles from Green River, WY, or about 2h 3m 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 54 miles or 55m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 122.9 miles or 2h 3m in

This is the best place for your longest stop, a real meal, and a full fuel check.

Final approach

Final hour starts around 3h 33m

Traffic, exits, and arrival timing usually matter more near Casper, 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 245.8 miles and 4h 28m.

Your first comfortable stop window is around 54 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.

Halfway Point

Midpoint

About 122.9 mi from Green River, WY · 2h 3m into the drive

city in Carbon County, Wyoming, United States

Mid-route town

Meal stop

Rawlins, WY

123 mi into the route

Best for: Lunch, fuel, and a longer reset

This sits close to the middle of the route, so it works well for the longest stop of the day.

Pacing Suggestions

Rock Springs, WY

Fuel and coffee

A short stop after about 54 miles helps settle the day before fatigue starts building.

Rawlins, WY

Meal break

The midpoint is around 122.9 miles from Green River, WY, which is a good place for a longer meal and fuel stop.

Before the longest stretch

Fuel check

Top up before Dwight D. Eisenhower Highway if your tank is already low. That segment runs about 119.3 miles.

Arriving in Casper, WY

The final approach into Casper, WY usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.

Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Casper, WY.

After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.

These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.

Fuel & Cost

Regular Gas

$38.95 one way

$77.90 round trip

$4.03/gal 25.4 MPG avg 86 kg CO₂

Fuel Type	$/gal	One Way	Round Trip
midgrade	$4.22	$40.83	$81.66
premium	$4.53	$43.85	$87.69
diesel	$5.61	$54.27	$108.54

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$39

Meals

$25–$50

Total

$64–$89

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 86 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $26 in charging · 0 stops · 66% less CO₂

Vehicle Type	kWh	Stops	DC Fast	Home Charge
Average EV	73.7	0	$25.81	$11.80
Efficient EV	61.5	0	$21.51	$9.83
EV Truck/SUV	98.3	1	$34.41	$15.73

Gas CO2

86 kg

EV CO2

29 kg (66% less)

Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.

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

Green River, WY

Afternoon in Green River on Thursday

Local time

12:56 PM

MDT

Current temp

65°F

Unavailable

Live forecast

Destination

Casper, WY

Afternoon in Casper on Thursday

Local time

12:56 PM

MDT

Current temp

44°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

21 degrees cooler at arrival

A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.

Road read

4h 28m on the road

An early start around 7-8 AM gets you there with plenty of daylight left.

Weather data from the National Weather Service. Conditions may change; check closer to your travel date.

Frequently Asked Questions

The drive from Green River, WY to Casper, WY covers 245.8 miles and takes about 4h 28m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.

The main roads are Dwight D. Eisenhower Highway, WY 220, 3rd Street. Expect a mix of highway and local road driving.

This is a comfortable same-day trip.

The midpoint is about 122.9 miles from Green River, WY. Look for rest areas, gas stations, or food options near the halfway mark.

At current regular gas prices, expect to spend about $38.95 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.

An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.

Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.

This is a straightforward 4h 28m drive. You will face about 11 decision points, but nothing that requires special attention if you follow navigation.

The main spots that need attention: near the start (I 80 Bus; US 30 Bus / East Flaming Gorge Way): Navigation decision point; at 1.1 miles (I 80 Bus; US 30 Bus): Multiple destination signs - pick the right one; at 121 miles (WY 789): Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.

The route from Green River, WY to Casper, WY does not surface many named destination signs beyond the main corridor.

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