Is there a bus from Deadwood to Casper?

No, there is no direct public bus service between these two cities.

How long is the drive?

The drive takes approximately 4 hours depending on stops.

Are there tolls on this route?

No, there are no toll roads on the route between Deadwood and Casper.

What is the best route?

Taking US-85 to US-20 is the most direct and reliable path.

Is the road mountainous?

The route is mostly high plains with rolling hills, not steep mountain passes.

Deadwood

Casper

Driving

Deadwood to Casper

Updated: 29 May 2026

The journey from Deadwood to Casper covers approximately 260 miles through the high plains of South Dakota and Wyoming. You will primarily utilize US-85 South before merging onto I-25 North near Cheyenne or taking the scenic route through Lusk. This drive typically takes 4 hours under normal traffic conditions. The route offers expansive views of the Powder River Basin and the Laramie Mountains. It is a straightforward drive that connects the historic Black Hills to the energy hub of Casper.

Total Distance: 418 km driving distance; 340 km straight-line air distance.

Fastest Way

Driving via US-85 and US-20 is the fastest route, taking exactly 4 hours.

Cheapest Way

Driving your own vehicle is the most economical option at approximately 45 dollars in fuel.

Compare Deadwood to Casper Routes

Driving

Direct

Duration

4 hours

Avg Price

40-60 USD

Operator

Personal Vehicle

Route

US-85 South to US-18 West, then US-20 West to Casper.

Check wind speeds on the open plains of Wyoming before departing.

Travel Tips

Fuel Up
Gas stations are sparse between Lusk and Casper; fill your tank in Lusk.
Wildlife Awareness
Watch for pronghorn and deer crossing the highway, especially at dawn and dusk.
Road Conditions
Check the Wyoming Department of Transportation website for real-time road closures.
Cell Service
Expect intermittent cell service in the rural stretches of Niobrara County.
Speed Limits
Strictly observe speed limits in small towns like Lusk to avoid heavy fines.

Safety Tips

Winter Driving
Carry tire chains and emergency supplies if traveling between October and April.
High Winds
High-profile vehicles should exercise caution during wind gusts exceeding 40 mph.
Emergency Kit
Keep water, blankets, and a flashlight in your trunk at all times.
Stay Alert
The monotony of the plains can cause fatigue; take breaks every two hours.