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Trip from Green River, WY to Mills, WY

Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 18, 2026 · Editorial standards

Drive Time

4h 17m

Distance

237.9 mi

383 km

Drive Score

10/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$38

one way

EV Charging

Good

6 stations

Best Time to Leave

Save up to 40 min
4 AM
4h 4m ★
6 AM
4h 18m
8 AM
4h 44m
10 AM
4h 27m
12 PM
4h 24m
3 PM
4h 28m
5 PM
4h 43m
8 PM
4h 10m

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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city in and county seat of Sweetwater County, Wyoming, United States

Green River, WY

Wikimedia Commons

Downtown Mills, WY, WY

Mills, WY

Dan Stone

Trip Overview

The drive from Green River, WY to Mills, WY covers 237.9 miles and takes about 4h 17m 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 mixed drive. The longest uninterrupted segment is about 119.3 miles on Dwight D. Eisenhower Highway. At current regular gas prices, budget about $37.70 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

118.9 miles from Green River, WY

A natural place for your longest stop of the day , about 1h 58m into the drive .

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 4h 17m. Total distance: 237.9 miles.

Family Friendly

Moderate complexity with 1 natural rest stops along the way.

Solo Traveler

4h 17m drive, comfortable solo distance.

First-Time Driver

Mostly highway driving (30%). Straightforward navigation.

Scenic Drive

Mixed drive route profile.

Drive Character

The drive from Green River, WY to Mills, WY covers 237.9 miles and takes about 4h 17m, using a mix of highways and local roads.

Expect a mix of faster highway mileage and slower local approaches near the beginning or end.
There are about 11 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?

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 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 17m drive. You will face about 8 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 1.7 miles (I 80; US 30 / Dwight D. Eisenhower Highway): Merge point - match speed before joining.

Critical Maneuvers

5 of 8 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
3
1.7 mi into trip | ~4m in | I 80; US 30 / Dwight D. Eisenhower Highway

Merge onto I 80; US 30 / Dwight D. Eisenhower Highway

Merge point - match speed before joining

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...
3
121.4 mi into trip | ~2h 1m in | I 80 Bus; US 30 Bus; WY 789 / West Spruce Street

Turn left onto I 80 Bus; US 30 Bus; WY 789 / West Spruce Street

Navigation decision point

Main Roads

Road Distance Duration
Dwight D. Eisenhower Highway 119.3 mi 1h 55m
WY 220 69.2 mi 1h 20m
3rd Street 44.1 mi 50m
West Spruce Street 1.7 mi 2m
Southwest Wyoming Boulevard 1.3 mi 2m
East Flaming Gorge Way 1.1 mi 2m
I 80 Bus 0.7 mi 1m
WY 789 0.4 mi <1m
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 Mills, 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

69 mi · 1 hr 20 min · WY 220
9

Turn left onto WY 258

1.3 mi · 2 min · Southwest Wyoming Boulevard
10

Turn right onto 1st Street

0.2 mi · 26 sec · 1st Street
11

Arrive at destination

1st Street

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 118.9 miles from Green River, WY, or about 1h 58m 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 52 miles or 53m in

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

Halfway reset

Around 118.9 miles or 1h 58m 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 26m

Traffic, exits, and arrival timing usually matter more near Mills, 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 237.9 miles and 4h 17m.

Your first comfortable stop window is around 52 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 118.9 mi from Green River, WY · 1h 58m into the drive

city in Carbon County, Wyoming, United States

Mid-route town

Meal stop

Rawlins, WY

119 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 52 miles helps settle the day before fatigue starts building.

Rawlins, WY

Meal break

The midpoint is around 118.9 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 Mills, WY

The final approach into Mills, 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 Mills, 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.

Nearby Places

Restaurants, cafes, gas stations and more along your route.

Top Restaurant

Eggington's

4.8 ★ ★ ★ ★ ★

Casper, Wyoming

Near the end, short detour

2.2 mi from route ~6 min detour $10 to $20 mile 237.9

Hours: 6 am–2 pm

+13072658700

Visit website

Eggington's

4.8 ★ ★ ★ ★ ★

Near the end, short detour

2.2 mi from route ~6 min detour $10 to $20 mile 237.9

Casper, Wyoming

Hours: 6 am–2 pm

+13072658700

Visit website

Wonderful House Restaurant

4.0 ★ ★ ★ ★ ☆

Near the start, short detour

3.4 mi from route ~8 min detour $20 to $30 mile 17

Rock Springs, Wyoming

Hours: 11 am–9:30 pm

+13073828800

Visit website

Pilot Flying J Charging Station

3.3 ★ ★ ★ ☆ ☆

Around the midpoint, right off the route

0.2 mi from route ~1 min detour mile 118.9

Rawlins, Wyoming

Hours: Open 24 hours

+13073280158

Visit website

EVgo Charging Station

4.0 ★ ★ ★ ★ ☆

Near the start, short detour

2.3 mi from route ~6 min detour mile 17

Rock Springs, Wyoming

Hours: Open 24 hours

+13073065796

Visit website

Electrify America Charging Station

4.2 ★ ★ ★ ★ ☆

Near the start, ~9 min detour

3.6 mi from route ~9 min detour mile 17

Rock Springs, Wyoming

Hours: Open 24 hours

+18336322778

Visit website

Electric Vehicle Charging Station

5.0 ★ ★ ★ ★ ★

Near the start, ~10 min detour

4 mi from route ~10 min detour mile 17

Rock Springs, Wyoming

Hours: Open 24 hours

Pilot Flying J Charging Station

Near the start, short detour

2.3 mi from route ~6 min detour mile 17

Rock Springs, Wyoming

Hours: Open 24 hours

Visit website

Flying J EV Charging Station

Near the start, short detour

2.6 mi from route ~7 min detour mile 17

Rock Springs, Wyoming

Hours: Open 24 hours

+13073065796

Visit website

Casper Downtown Development Authority

4.5 ★ ★ ★ ★ ★

Near the end, short detour

2.1 mi from route ~5 min detour mile 237.9

Casper, Wyoming

Hours: 8 am–5 pm

+13073331403

Visit website

Place data sourced from public business listings. Hours and availability may vary.

Fuel & Cost

Regular Gas

$37.70 one way

$75.40 round trip

$4.03/gal 25.4 MPG avg 83 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.22 $39.52 $79.03
premium $4.53 $42.44 $84.88
diesel $5.61 $52.53 $105.05

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$38

Meals

$25–$50

Total

$63–$88

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

Estimated CO2 emission: 83.2 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $25 in charging · 0 stops · 66% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 71.4 0 $24.98 $11.42
Efficient EV 59.5 0 $20.82 $9.52
EV Truck/SUV 95.2 1 $33.31 $15.23

Gas CO2

83 kg

EV CO2

28 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

Late night in Green River on Saturday

Local time

2:20 AM

MDT

Current temp

65°F

Unavailable

Live forecast

Destination

Mills, WY

Late night in Mills on Saturday

Local time

2:20 AM

MDT

Current temp

45°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

20 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 17m 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 Mills, WY covers 237.9 miles and takes about 4h 17m 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 118.9 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 $37.70 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 17m drive. You will face about 8 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 1.7 miles (I 80; US 30 / Dwight D. Eisenhower Highway): Merge point - match speed before joining.

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

How this page is built

Compiled by the Trip.ovh 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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