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Trip from Rock Springs, WY to Bar Nunn, WY

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

Drive Time

4h 9m

Distance

229.5 mi

369 km

Drive Score

10/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$36

one way

EV Charging

Good

5 stations

Best Time to Leave

Save up to 39 min
4 AM
3h 57m ★
6 AM
4h 10m
8 AM
4h 36m
10 AM
4h 19m
12 PM
4h 16m
3 PM
4h 20m
5 PM
4h 35m
8 PM
4h 2m

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 Sweetwater County, Wyoming, United States

Rock Springs, WY

Wikimedia Commons

Downtown Bar Nunn, WY, WY

Bar Nunn, WY

Valeria Boltneva

Trip Overview

The drive from Rock Springs, WY to Bar Nunn, WY covers 229.5 miles and takes about 4h 9m 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 highway & surface. The longest uninterrupted segment is about 103.9 miles on Dwight D. Eisenhower Highway. At current regular gas prices, budget about $36.37 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

114.7 miles from Rock Springs, WY

A natural place for your longest stop of the day , about 1h 56m into the drive .

Main Roads

Road Distance Duration
Dwight D. Eisenhower Highway 103.9 mi 1h 40m
WY 220 63.7 mi 1h 12m
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
I 25 1.4 mi 1m
Salt Creek Highway 1.1 mi 1m
Longest stretch: Dwight D. Eisenhower Highway — 103.9 mi, about 1h 40m

Turn-by-Turn Driving Directions

Step-by-step road directions between Rock Springs, WY and Bar Nunn, WY.

1

Start on Collins Street

84 ft · 7 sec · Collins Street
2

Turn right onto Agate Street

422 ft · 18 sec · Agate Street
3

At end of road, turn left onto Edgar Street

0.1 mi · 25 sec · Edgar Street
4

Turn right onto Virginia Street

0.2 mi · 40 sec · Virginia Street
5

At end of road, turn right onto James Drive

0.2 mi · 32 sec · James Drive
6

At end of road, turn left onto WY 376

0.4 mi · 48 sec · South Side Belt Route
7

Turn right onto I 80 Business; US 30 Business

0.4 mi · 38 sec · 9th Street
8

Take the ramp

0.4 mi · 29 sec
9

Merge onto I 80; US 30

104 mi · 1 hr 40 min · Dwight D. Eisenhower Highway
10

Take the exit onto WY 789

0.4 mi · 52 sec · WY 789
Toward I 80 Business East, WY 789 North: Rawlins
11

Turn left onto I 80 Bus; US 30 Bus; WY 789

1.7 mi · 2 min · West Spruce Street
12

Turn left onto US 287; WY 789

44 mi · 50 min · 3rd Street
13

Continue on WY 220

64 mi · 1 hr 12 min · WY 220
14

Turn left onto WY 257

7.3 mi · 8 min · Casper West Belt
15

Continue on US 20; US 26

3.0 mi · 3 min · US 20; US 26
16

Turn left

0.4 mi · 50 sec
Toward I 25 North, US 87 North: Midwest
17

Merge onto I 25; US 87

1.4 mi · 1 min · I 25; US 87
18

Take the exit

0.3 mi · 49 sec
Toward Wardwell Road
19

Turn left onto WY 254

0.2 mi · 24 sec · Howard Street
20

Turn right onto Salt Creek Highway

1.1 mi · 1 min · Salt Creek Highway
21

Turn left onto Sunset Boulevard

0.3 mi · 36 sec · Sunset Boulevard
22

Arrive at destination

Sunset Boulevard

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 114.7 miles from Rock Springs, WY, or about 1h 56m into the drive.
The longest continuous stretch on this route runs about 103.9 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 50 miles or 50m in

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

Halfway reset

Around 114.7 miles or 1h 56m 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 20m

Traffic, exits, and arrival timing usually matter more near Bar Nunn, WY than in the middle of the route.

Before You Leave

+

Open the route before leaving Rock Springs, 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 Rock Springs, WY

This is one driving day of about 229.5 miles and 4h 9m.

Your first comfortable stop window is around 50 miles from Rock Springs, 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 103.9 miles.

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

city in Carbon County, Wyoming, United States

Mid-route town

Meal stop

Rawlins, WY

115 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

Green River, WY

Fuel and coffee

A short stop after about 50 miles helps settle the day before fatigue starts building.

Rawlins, WY

Meal break

The midpoint is around 114.7 miles from Rock Springs, 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 103.9 miles.

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

Wonderful House Restaurant

4.0 ★ ★ ★ ★ ☆

Rock Springs, Wyoming

Near the start, short detour

2.8 mi from route ~7 min detour $20 to $30

Hours: 11 am–9:30 pm

+13073828800

Visit website

Wonderful House Restaurant

4.0 ★ ★ ★ ★ ☆

Near the start, short detour

2.8 mi from route ~7 min detour $20 to $30

Rock Springs, Wyoming

Hours: 11 am–9:30 pm

+13073828800

Visit website

Eggington's

4.8 ★ ★ ★ ★ ★

Near the end, ~11 min detour

4.6 mi from route ~11 min detour $10 to $20 mile 229.5

Casper, Wyoming

Hours: 6 am–2 pm

+13072658700

Visit website

EVgo Charging Station

4.0 ★ ★ ★ ★ ☆

Near the start, short detour

2.1 mi from route ~5 min detour

Rock Springs, Wyoming

Hours: Open 24 hours

+13073065796

Visit website

Electrify America Charging Station

4.2 ★ ★ ★ ★ ☆

Near the start, short detour

3 mi from route ~8 min detour

Rock Springs, Wyoming

Hours: Open 24 hours

+18336322778

Visit website

Electric Vehicle Charging Station

5.0 ★ ★ ★ ★ ★

Near the start, ~9 min detour

3.4 mi from route ~9 min detour

Rock Springs, Wyoming

Hours: Open 24 hours

Pilot Flying J Charging Station

Near the start, short detour

2.1 mi from route ~5 min detour

Rock Springs, Wyoming

Hours: Open 24 hours

Visit website

Flying J EV Charging Station

Near the start, short detour

2.3 mi from route ~6 min detour

Rock Springs, Wyoming

Hours: Open 24 hours

+13073065796

Visit website

Casper Downtown Development Authority

4.5 ★ ★ ★ ★ ★

Near the end, ~11 min detour

4.6 mi from route ~11 min detour mile 229.5

Casper, Wyoming

Hours: 8 am–5 pm

+13073331403

Visit website

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

Heads-up: tricky spots

5 of 18

5 decision points cluster between mile 0 and 0.6 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.

5
0 mi into trip | ~0m in | Agate Street

Turn right onto Agate Street

Navigation decision point

5
0.1 mi into trip | ~0m in | Edgar Street

At end of road, turn left onto Edgar Street

Navigation decision point

5
0.2 mi into trip | ~0m in | Virginia Street

Turn right onto Virginia Street

Navigation decision point

5
0.4 mi into trip | ~1m in | James Drive

At end of road, turn right onto James Drive

Navigation decision point

5
0.6 mi into trip | ~2m in | WY 376 / South Side Belt Route

At end of road, turn left onto WY 376 / South Side Belt Route

Navigation decision point

Fuel & Cost

Regular Gas

$36.37 one way

$72.74 round trip

$4.03/gal 25.4 MPG avg 80 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.22 $38.12 $76.24
premium $4.53 $40.94 $81.88
diesel $5.61 $50.67 $101.34

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$36

Meals

$25–$50

Total

$61–$86

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

Estimated CO2 emission: 80.3 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $24 in charging · 0 stops · 66% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 68.9 0 $24.10 $11.02
Efficient EV 57.4 0 $20.08 $9.18
EV Truck/SUV 91.8 1 $32.13 $14.69

Gas CO2

80 kg

EV CO2

27 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 18, 2026

Origin

Rock Springs, WY

Afternoon in Rock Springs on Saturday

Local time

1:09 PM

MDT

Current temp

20°F

Mostly Clear

WSW 10 mph 0% chance Live forecast

Freeze Warning

Freeze Warning issued April 18 at 3:13AM MDT until April 18 at 9:00AM MDT by NWS Riverton WY

Freeze Warning

Freeze Warning issued April 18 at 3:13AM MDT until April 18 at 9:00AM MDT by NWS Riverton WY

Destination

Bar Nunn, WY

Afternoon in Bar Nunn on Saturday

Local time

1:09 PM

MDT

Current temp

17°F

Mostly Clear

W 9 mph 0% chance Live forecast

Freeze Warning

Freeze Warning issued April 18 at 3:13AM MDT until April 18 at 9:00AM MDT by NWS Riverton WY

Freeze Warning

Freeze Warning issued April 18 at 3:13AM MDT until April 18 at 9:00AM MDT by NWS Riverton WY

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 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 9m 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.

What kind of drive is this?

229.5 mi in 4h 9m — 30% highway, the rest on surface roads. Biggest road: Dwight D. Eisenhower Highway.

30% highway, the rest on surface roads — varied driving throughout.
22 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 103.9 mi on Dwight D. Eisenhower Highway.

How Hard Is This Drive?

3/10

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 Agate Street.

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 9m drive. You will face about 18 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 (Agate Street): Navigation decision point; at 0.1 miles (Edgar Street): Navigation decision point; at 0.2 miles (Virginia Street): Navigation decision point.

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 4h 9m. Total distance: 229.5 miles.

Family Friendly

Moderate complexity with 1 natural rest stops along the way.

Solo Traveler

4h 9m drive, comfortable solo distance.

First-Time Driver

Mostly highway driving (30%). Straightforward navigation.

Scenic Drive

Mixed highway & surface route profile.

Frequently Asked Questions

The longest stretch is about 103.9 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.

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: near the start (Agate Street): Navigation decision point; at 0.1 miles (Edgar Street): Navigation decision point; at 0.2 miles (Virginia Street): Navigation decision point.

Possible but tiring. At 4.2 hours each way, an in-and-out day trip would put you behind the wheel for 8.3 hours — manageable with a long break at Bar Nunn, WY, but most travelers stay overnight.

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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