How far is Casper, WY from Riverton, WY?
The driving distance from Casper, WY to Riverton, WY is about 123.4 miles (198.6 km), with a travel time of about 02h 16m by car.
- The straight-line flight distance is about 105.1 miles (169.2 km).
- For a round trip, plan for roughly 04h 32m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 16m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Driving Route Map
The map below follows the saved road route between Casper and Riverton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Casper and Riverton.
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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
35.8 mi · 41 min · West Yellowstone Highway
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11
Continue on West US Highway 20-26
58.5 mi · 1 hr 6 min · West US Highway 20-26
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12
Continue straight
17.7 mi · 20 min
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13
Continue straight
3.9 mi · 5 min
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14
Arrive at your destination
0 m · 1 sec · North Federal Boulevard
Car Route Details
A richer read on the saved driving route between Casper and Riverton.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
West US Highway 20-26
Continue on West US Highway 20-26
58.5 mi · 01h 06m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Casper and Sunny near Riverton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Casper to Riverton?
The road trip is about 123.4 miles (198.6 km) and usually takes 02h 16m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Shoshoni is a useful midpoint, sitting about 61.7 miles from Casper and 61.8 miles from Riverton.
How much longer is the road route than the straight-line distance?
The direct path is about 105.1 miles (169.2 km), while the road route adds roughly 18.3 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 8:00 AM to 10:00 AM MDT. If you want a more comfortable same-day return, try to leave by 1:58 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $16.97 one way or $33.95 round trip. Estimated CO2 is about 38.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Casper and Sunny near Riverton.
Flight Path Map
This map shows the direct air route between Casper and Riverton. Straight-line distance: 105.11 mi (169.16 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 Riverton
City in Freemont County, Wyoming
| Population | 10,819 |
| Coordinates | 43.0249600, -108.3801000 |
| Altitude | 1509 |
| Country | United States |
End: North Federal Boulevard (-108.380624, 43.024965)
Estimated Travel Time
Distance: 199 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 06m |
| 40 mph (64.37 km/h) | 03h 05m |
| 50 mph (80.47 km/h) | 02h 28m |
| 60 mph (96.56 km/h) | 02h 03m |
| 70 mph (112.65 km/h) | 01h 45m |
| 80 mph (129 km/h) | 01h 32m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $16.97 | $33.95 |
| Mid-grade | $4.23 | $18.45 | $36.89 |
| Premium | $4.55 | $19.83 | $39.67 |
| Diesel | $5.41 | $23.60 | $47.19 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.