Glenrock, WY to Rock Springs, WY is 251.5 miles and takes about 4h 33m via Dwight D. Eisenhower Highway and US 287, with a fuel budget near $44 and enough daylight to finish in a day. This one-day trip stays within the Mountain West region, traversing Wyoming for its entirety. Expect a drive that primarily utilizes surface roads, offering a more grounded experience than a pure interstate cruise. With just one recommended stop and a longest stretch of 103.6 miles on the Dwight D. Eisenhower Highway, it's a straightforward drive for anyone needing to cover ground efficiently between these two Wyoming cities.
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
125.8 miles from Glenrock, WY
A natural place for your longest stop of the day
, about 2h 23m into the drive
.
Main Roads
Road
Distance
Duration
Dwight D. Eisenhower Highway
103.6 mi
1h 40m
County Road 308
63.7 mi
1h 12m
US 287
44.1 mi
50m
I 25
23.3 mi
24m
Casper West Belt
7.3 mi
8m
US 20
3 mi
3m
West Spruce Street
1.5 mi
2m
Deer Creek Road
1.4 mi
2m
Longest stretch:
Dwight D. Eisenhower Highway
— 103.6 mi, about 1h 40m
Traffic on I-80
Hour-of-day weekday pattern from 8 FHWA count stations on your route.
Peak
2 PM
~480 veh/hr typical
· worst 725
Quietest
2 AM
~91 veh/hr
Peak-to-quiet ratio
5.3×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 49 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 Glenrock, WY and Rock Springs, WY.
1
Start on US 20; US 26; US 87
23 ft·2 sec·West Birch Street
2
Turn right onto I 25 Business; WY 95
0.6 mi·50 sec·South 4th Street
3
Continue on I 25 Business; WY 95
1.4 mi·2 min·Deer Creek Road
4
Take the ramp onto I 25
23 mi·24 min·I 25
5
Take the exit
0.3 mi·45 sec
Toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
6
Keep slight left at fork
350 ft·10 sec
7
Turn left onto US 20; US 26
3.0 mi·3 min·US 20; US 26
8
Continue on WY 257
7.3 mi·8 min·Casper West Belt
9
Turn right onto WY 220
64 mi·1 hr 12 min·County Road 308
10
Continue on US 287; WY 789
44 mi·50 min·US 287; WY 789
11
Turn right onto I 80 Bus; US 30 Bus; WY 789
1.5 mi·2 min·West Spruce Street
12
Take the ramp onto WY 789
0.6 mi·1 min·WY 789
13
Merge onto I 80; US 30; WY 789
104 mi·1 hr 40 min·Dwight D. Eisenhower Highway
14
Take the exit
0.5 mi·48 sec
Toward I 80 Business West, US 30 Business West
15
Turn left onto I 80 Business; US 30 Business
0.5 mi·51 sec·9th Street
16
Turn left onto WY 376
0.4 mi·40 sec·South Side Belt Route
17
Turn slight right onto James Drive
230 ft·10 sec·James Drive
18
Turn straight onto James Drive
0.2 mi·24 sec·James Drive
19
Turn left onto Virginia Street
0.2 mi·46 sec·Virginia Street
20
Turn left onto Edgar Street
0.1 mi·22 sec·Edgar Street
21
At end of road, turn right onto Agate Street
422 ft·23 sec·Agate Street
22
Turn left onto Collins Street
84 ft·3 sec·Collins Street
23
Arrive at destination
Collins Street
Trip Plan
Given the 4h 33m estimated drive time, leaving Glenrock in the morning should allow you to reach Rock Springs with ample daylight. The route is designed for a single day, so you won't need to plan for an overnight stay. While there's only one recommended stop, it's wise to be aware of your fuel gauge, especially during the 103.6-mile stretch on the Dwight D. Eisenhower Highway. Planning to refuel before you leave Glenrock or shortly after hitting US 287 could be a good strategy. Keep an eye on the weather, as conditions in Wyoming can change quickly, even on a mostly surface roads profile.
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 125.8 miles from Glenrock, WY, or about 2h 23m into the drive.
The longest continuous stretch on this route runs about 103.6 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 55 miles or 1h 3m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 125.8 miles or 2h 23m 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 46m
Traffic, exits, and arrival timing usually matter more near Rock Springs, WY than in the middle of the route.
Before You Leave
+
Open the route before leaving Glenrock, 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 Glenrock, WY
This is one driving day of about 251.5 miles and 4h 33m.
Your first comfortable stop window is around 55 miles from Glenrock, 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 103.6 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 15
5 decision points cluster between mile 25.3 and 251.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
25.3 mi into trip|~27m 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...
5
249.5 mi into trip|~4h 28m in
Take the exit toward I 80 Business West, US 30 Business West
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 80 Business West, US 30 Business West
5
251.3 mi into trip|~4h 32m in|Edgar Street
Turn left onto Edgar Street
Navigation decision point
5
251.4 mi into trip|~4h 32m in|Agate Street
At end of road, turn right onto Agate Street
Navigation decision point
5
251.5 mi into trip|~4h 32m in|Collins Street
Turn left onto Collins Street
Navigation decision point
Fuel & Cost
Regular Gas
$39.20 one way
$78.40 round trip
$3.96/gal25.4 MPG avg88 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.17
$41.32
$82.64
premium
$4.47
$44.30
$88.60
diesel
$4.80
$47.49
$94.98
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: 88 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $26 in charging
· 0 stops
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
75.5
0
$26.41
$12.07
Efficient EV
62.9
0
$22.01
$10.06
EV Truck/SUV
100.6
1
$35.21
$16.10
Gas CO2
88 kg
EV CO2
29 kg (67% 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 Jul 18, 2026
Origin
Glenrock, WY
Late night
in Glenrock on Sunday
Local time
3:34 AM
MDT
Current temp
61°F
Mostly Clear
E 5 mph1% chanceLive forecast
Flood Watch
Flood Watch issued July 18 at 2:37AM MDT until July 18 at 10:00PM MDT by NWS Riverton WY
Heat Advisory
Heat Advisory issued July 18 at 1:23AM MDT until July 19 at 9:00PM MDT by NWS Rapid City SD
Destination
Rock Springs, WY
Late night
in Rock Springs on Sunday
Local time
3:34 AM
MDT
Current temp
56°F
Partly Cloudy
SW 5 mph1% chanceLive forecast
Flood Watch
Flood Watch issued July 18 at 2:37AM MDT until July 18 at 10:00PM MDT by NWS Riverton WY
Heat Advisory
Heat Advisory issued July 18 at 1:23AM MDT until July 19 at 9:00PM MDT by NWS Rapid City SD
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
5 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 33m 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.
More Details
What kind of drive is this?
This route features 28% highway driving, with the longest continuous stretch on the Dwight D. Eisenhower Highway spanning 103.6 miles. After the highway portion, you'll transition to surface roads, including County Road 308 and US 287. The change from highway to surface roads will likely be noticeable as you encounter more varied terrain and potentially slower local traffic. The profile is described as mostly surface roads, suggesting a more rural and less developed driving experience for a significant portion of the trip.
Only 28% highway — the rest is turn-by-turn surface driving.
23 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 103.6 mi on Dwight D. Eisenhower 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 25.3 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 4h 33m drive. You will face about 15 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 25.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 249.5 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 251.3 miles (Edgar Street): Navigation decision point.
Elevation Profile
High-altitude sections with notable climbs
7,073 ft5,019 ft
Total Climb
2,365 ft
Total Descent
987 ft
Highest Point
7,073 ft
~215.6 mi in
Elevation Range
2,054 ft
Notable High Points
5,410 ft at ~35.9 miles+39 ft prominence
6,709 ft at ~107.8 miles+190 ft prominence
6,845 ft at ~161.7 miles+37 ft prominence
7,073 ft at ~215.6 miles+118 ft prominence
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Glenrock, WY to Rock Springs, WY, road signs begin pointing toward Port Of Entry along the way.
Rock Springs is the biggest city in Sweetwater County in Southwest Wyoming. It had a population of 23,000 in 2019. Rock Springs' nickname is: "Home of 56 Nationalities". The town has a rich western and coal mining history.
The longest stretch is about 103.6 miles on Dwight D. Eisenhower Highway. The full list of main roads is in the Roads section above.
Yes — we found about 8 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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 25.3 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 249.5 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one; at 251.3 miles (Edgar Street): Navigation decision point.
Possible but tiring. At 4.6 hours each way, an in-and-out day trip would put you behind the wheel for 9.1 hours — manageable with a long break at Rock Springs, WY, but most travelers stay overnight.
