How far is Newcastle, WY from Riverton, WY?
The driving distance from Newcastle, WY to Riverton, WY is about 280.4 miles (451.3 km), with a travel time of about 05h 03m by car.
- The straight-line flight distance is about 217.1 miles (349.4 km).
- For a round trip, plan for roughly 10h 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 05h 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.
Chance Showers And Thunderstorms
Sunny
Driving Route Map
The map below follows the saved road route between Newcastle and Riverton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Newcastle and Riverton.
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1
Start on West Main Street
2.1 mi · 3 min · West Main Street
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2
Continue on US Highway 16
1.2 km · 1 min · US Highway 16
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3
Turn left onto Highway 450
45.6 mi · 1 hr 8 min · Highway 450
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4
Continue on Clareton Highway
20.6 mi · 31 min · Clareton Highway
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5
Turn right onto State Highway 59 South
2.7 mi · 3 min · State Highway 59 South
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6
Turn left
51.3 mi · 59 min
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7
Turn left
18.1 mi · 21 min
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8
Take the exit left toward I 25 South: Casper
2173 ft · 53 sec
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9
Merge slight left
20.1 mi · 19 min
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10
Take the exit slight right toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
1757 ft · 43 sec
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11
Keep slight left
577 ft · 17 sec
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12
Turn right
2.7 mi · 3 min
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13
Turn right onto West Yellowstone Highway
94.3 mi · 1 hr 47 min · West Yellowstone Highway
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14
Continue straight
17.7 mi · 20 min
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15
Continue straight
3.9 mi · 5 min
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16
Arrive at your destination
0 m · 1 sec · North Federal Boulevard
Car Route Details
A richer read on the saved driving route between Newcastle 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 Yellowstone Highway
Turn right onto West Yellowstone Highway
94.3 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.
Chance Showers And Thunderstorms leaving Newcastle and Sunny near Riverton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Newcastle to Riverton?
The road trip is about 280.4 miles (451.3 km) and usually takes 05h 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?
Midwest is a useful midpoint, sitting about 140.1 miles from Newcastle and 140.3 miles from Riverton.
How much longer is the road route than the straight-line distance?
The direct path is about 217.1 miles (349.4 km), while the road route adds roughly 63.3 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 6:00 AM to 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 6:52 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $38.54 one way or $77.08 round trip. Estimated CO2 is about 88 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Newcastle and Sunny near Riverton.
Stop Ideas Near Midwest
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Midwest.
Casper, Wyoming
Douglas, Wyoming
Flight Path Map
This map shows the direct air route between Newcastle and Riverton. Straight-line distance: 217.14 mi (349.45 km).
#1 Newcastle
City in Weston County, Wyoming, United States
| Population | 3,314 |
| Coordinates | 43.8547000, -104.2049400 |
| Altitude | 1319 |
| 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: 451 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 20m |
| 40 mph (64.37 km/h) | 07h 00m |
| 50 mph (80.47 km/h) | 05h 36m |
| 60 mph (96.56 km/h) | 04h 40m |
| 70 mph (112.65 km/h) | 04h 00m |
| 80 mph (129 km/h) | 03h 29m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $38.54 | $77.08 |
| Mid-grade | $4.23 | $41.89 | $83.77 |
| Premium | $4.55 | $45.04 | $90.07 |
| Diesel | $5.41 | $53.58 | $107.16 |
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 · Jun 01, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.