How far is Casper, WY from Greybull, WY?
The driving distance from Casper, WY to Greybull, WY is about 204.7 miles (329.4 km), with a travel time of about 04h 03m by car.
- The straight-line flight distance is about 142 miles (228.5 km).
- For a round trip, plan for roughly 08h 07m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 04h 03m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town of the United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Scattered Snow Showers
Driving Route Map
The map below follows the saved road route between Casper and Greybull.
Turn-by-Turn Driving Directions
Step-by-step road directions between Casper and Greybull.
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1
Start on North Sunlight Drive
1368 ft · 1 min · North Sunlight Drive
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2
Turn right
770 ft · 34 sec
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3
Turn right onto East Sunlight Drive
2655 ft · 2 min · East Sunlight Drive
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4
At the end of the road, turn right onto Bryan Stock Trail
1.1 mi · 2 min · Bryan Stock Trail
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5
Turn right onto East F Street
967 ft · 16 sec · East F Street
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6
Take the ramp straight
2.1 mi · 3 min
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7
Take the exit slight right toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
1846 ft · 45 sec
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8
Keep slight left
107 m · 11 sec
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9
Turn left
3 mi · 4 min
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10
Turn right onto West Yellowstone Highway
93.8 mi · 1 hr 47 min · West Yellowstone Highway
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11
Turn right onto Idaho Street
31.9 mi · 38 min · Idaho Street
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12
Turn left onto South 6th Street
1.3 km · 2 min · South 6th Street
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13
Continue on Park Street
32.4 mi · 39 min · Park Street
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14
Turn left onto North Railway Avenue
2336 ft · 1 min · North Railway Avenue
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15
Continue on Russell Avenue
606 ft · 22 sec · Russell Avenue
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16
Turn left onto North 10th Street
37.5 mi · 42 min · North 10th Street
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17
Turn left onto Greybull Avenue
82 m · 13 sec · Greybull Avenue
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18
Turn right onto North 7th Street
25 m · 4 sec · North 7th Street
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19
Arrive at your destination
0 m · 1 sec · North 7th Street
Car Route Details
A richer read on the saved driving route between Casper and Greybull.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
West Yellowstone Highway
Turn right onto West Yellowstone Highway
93.8 mi · 01h 47m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Snow Showers leaving Casper and Scattered Snow Showers near Greybull.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Casper to Greybull?
The road trip is about 204.7 miles (329.4 km) and usually takes 04h 03m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Shoshoni is a useful midpoint, sitting about 102.2 miles from Casper and 102.5 miles from Greybull.
How much longer is the road route than the straight-line distance?
The direct path is about 142 miles (228.5 km), while the road route adds roughly 62.7 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 8:52 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.11 one way or $56.21 round trip. Estimated CO2 is about 64.2 kg one way.
What should you check before leaving?
Before you leave, expect Snow Showers around Casper and Scattered Snow Showers near Greybull.
Flight Path Map
This map shows the direct air route between Casper and Greybull. Straight-line distance: 141.96 mi (228.46 km).
#1 Casper
The most populous city in Natrona County, Wyoming.
| Population | 58,498 |
| Coordinates | 42.8666300, -106.3130800 |
| Altitude | 1560 |
| Country | United States |
#2 Greybull
Town in Big Horn County, Wyoming
| Population | 1,797 |
| Coordinates | 44.4891200, -108.0562100 |
| Altitude | 1156 |
| Country | United States |
End: Greybull (-108.05621, 44.48912)
Estimated Travel Time
Distance: 329 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 49m |
| 40 mph (64.37 km/h) | 05h 07m |
| 50 mph (80.47 km/h) | 04h 05m |
| 60 mph (96.56 km/h) | 03h 24m |
| 70 mph (112.65 km/h) | 02h 55m |
| 80 mph (129 km/h) | 02h 33m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $28.11 | $56.21 |
| Mid-grade | $4.23 | $30.55 | $61.10 |
| Premium | $4.55 | $32.84 | $65.69 |
| Diesel | $5.41 | $39.07 | $78.15 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Wyoming · Apr 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.