How far is it from Ajax, South Dakota to Belle Fourche, South Dakota?

The distance from Ajax, South Dakota to Belle Fourche, South Dakota is 89.7 mi. The total travel time is approximately 1 hour 33 minutes.

How long does it take to drive from Ajax, South Dakota to Belle Fourche, South Dakota?

The driving time from Ajax, South Dakota to Belle Fourche, South Dakota is approximately 1 hour 33 minutes. The total distance is 89.7 mi taking approximately 1 hour 33 minutes.

Distance from Ajax to Belle Fourche

Driving Distance

89.7 mi • 144.4 km

Flying Distance

62.9 mi • 101.3 km

58 mph avg speed

Northwest direction

1 hr 33 min travel time

Route Information

The driving distance from Ajax, South Dakota to Belle Fourche, South Dakota is 89.7 mi (144.4 km)

The straight-line (air) distance is 62.9 mi (101.3 km)

The estimated flight time is 0 hr 8 min

The estimated travel time by road is 1 hour 33 minutes

Traveling highway, substantial in a northwest direction. Average speeds around 58 mph.

Location Details

Origin:

No image available

Place	Ajax
State/Province	South Dakota
Country	US
Latitude	43.89749
Longitude	-103.181851
GPS	43.89749° N, 103.181851° W
Local Time	12:30 AM
Timezone	America/Denver

Destination:

Place	Belle Fourche
State/Province	South Dakota
Country	US
Latitude	44.671373
Longitude	-103.852148
GPS	44.671373° N, 103.852148° W
Local Time	12:30 AM
Timezone	America/Denver

Journey Summary

Traveling from Ajax, South Dakota to Belle Fourche, South Dakota covers 89.7 mi (144.4 km) in a northwest direction. This highway, substantial route typically takes 1 hour 33 minutes under normal conditions.

Drivers have 2 route options between these locations (71.3-89.7 miles / 115-144 km). The primary route shown here saves 21 minutes compared to alternatives.

The route features scenic views along the way. with average speeds around 58 mph (93 km/h).

Available Routes

I-90 W and SD-79 N

89.7 mi 1 hour 33 minutes

Shortest

I-90 W

71.3 mi 1 hour 13 minutes

Fastest

How is the distance calculated?

Driving distances are based on actual road data. We use advanced routing algorithms that consider traffic, tolls, highways, and local streets. For air distances (as the crow flies), we use the Vincenty formula. It's a precise method that accounts for the Earth's shape and provides accuracy up to 0.5 mm.

When multiple route options exist, we display both the shortest and fastest paths. Travel times are estimated based on typical speeds for each road type, though actual times may vary with traffic and weather conditions. All distances are shown in both miles and kilometers for convenience.