What is the best time to drive?

Daylight hours are best to enjoy the scenery.

Yes, it is a major interstate highway and generally very safe.

Spearfish

Sioux Falls

Driving

Spearfish to Sioux Falls

Updated: 28 May 2026

The journey from Spearfish to Sioux Falls spans the entire width of South Dakota, covering approximately 600 kilometers along Interstate 90. This drive takes you across the Great Plains, passing through the Badlands and the Missouri River valley. You can expect a travel time of about 6 hours, depending on stops. It is a classic American road trip that showcases the transition from the mountainous Black Hills to the rolling agricultural prairies of eastern South Dakota.

Total Distance: Driving distance 600 km; Air distance 550 km.

Fastest Way

Driving via I-90 E is the fastest and most direct route.

Cheapest Way

Driving is the most practical and cost-effective way to make this trip.

Compare Spearfish to Sioux Falls Routes

Driving

Direct

Duration

6 hours

Avg Price

$70 - $100 in fuel

Operator

Personal Vehicle

Route

I-90 E

Stop in Mitchell to see the world-famous Corn Palace.

Travel Tips

Rest Stops
Plan your stops in towns like Wall, Chamberlain, and Mitchell.
Speed Limits
The speed limit is generally 80 mph on rural sections of I-90.
Weather
Be prepared for high winds, which are common on the open plains.
Fuel
Keep your tank at least half full when crossing the more remote western sections.
Navigation
The route is almost entirely on I-90, making navigation very simple.

Safety Tips

Fatigue
The long, straight roads can cause driver fatigue; take regular breaks.
Winter Safety
Avoid travel during blizzards, which can close I-90 for extended periods.
Emergency Kit
Carry a winter survival kit in your vehicle during the colder months.
Communication
Cell service is generally good, but keep a physical map for backup.