How far is Spearfish, SD from Dakota Dunes, SD?

The driving distance from Spearfish, SD to Dakota Dunes, SD is about 469.9 miles (756.2 km), with a travel time of about 07h 36m by car.

  • The straight-line flight distance is about 394.5 miles (634.9 km).
  • For a round trip, plan for roughly 15h 12m of driving time before adding stops, traffic, or weather delays.
  • A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
Trip Tools

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.

Reverse Route
Quick Snapshot
Road
469.89 mi
07h 36m
Flight
394.48 mi
634.85 km direct

This drive is better planned with a longer stop or an overnight stay.

Learn Distance

Choose another destination from Spearfish.

Flight Distance

Direct air line
394.48 mi
Kilometers
634.85 km
Flight Time
00h 47m

Driving Distance

Road route
469.89 mi
Kilometers
756.22 km
Drive Time
07h 36m

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 07h 36m.

Arrival Snapshot
Arrive in Dakota Dunes
Sat, Apr 18, 8:55 AM CDT
Return by in Spearfish
Sat, Apr 18, 3:31 PM MDT
Useful when you're deciding between a quick errand, a day trip, or a longer stop.
Leave Spearfish
2026-04-18T00:18
Arrive Dakota Dunes
Sat, Apr 18, 7:55 AM MDT
Route Timing
07h 36m
One way by road
Best Departure Window
6:00 AM to 7:30 AM MDT
Treat this as a longer travel day
Arrive between
2:36 PM to 4:06 PM CDT

Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.

Leave by
8:48 PM MDT
Keeps a same-day return open with about 08h 00m at the destination.
Back in Spearfish
8:00 PM MDT
Overnight-style route

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.

Mid-route stop
Reliance
SD

Town in Lyman County, South Dakota, United States

From Spearfish
234.5 mi
03h 48m
To Dakota Dunes
235.4 mi
03h 48m

Route Weather Snapshot

Check the forecast at both ends before you head out.

Origin
45°F
Saturday

Chance Snow Showers

Starts
Sat, Apr 18 6:00 AM MDT
Wind
10 to 17 mph NW
Destination
51°F
Saturday

Slight Chance Snow Showers

Starts
Sat, Apr 18 6:00 AM CDT
Wind
20 to 25 mph NW

Driving Route Map

The map below follows the saved road route between Spearfish and Dakota Dunes.

Turn-by-Turn Driving Directions

Step-by-step road directions between Spearfish and Dakota Dunes.

  1. 1

    Start on North Main Street

    26 m · 30 sec · North Main Street

  2. 2

    Continue on North Main Street

    51 m · 10 sec · North Main Street

  3. 3

    Turn right onto East Jackson Boulevard

    2777 ft · 2 min · East Jackson Boulevard

  4. 4

    Take the ramp right toward I 90 East, US 85 South

    1555 ft · 38 sec

  5. 5

    Merge slight left

    14.2 mi · 14 min

  6. 6

    Continue straight

    7.6 mi · 8 min

  7. 7

    Continue straight

    23.6 mi · 24 min

  8. 8

    Continue straight

    338.5 mi · 5 hr 20 min

  9. 9

    Take the exit slight right

    2349 ft · 57 sec

  10. 10

    Merge slight left

    82.4 mi · 1 hr 20 min

  11. 11

    Take the exit slight right toward Dakota Dunes

    2108 ft · 54 sec

  12. 12

    Turn right onto Dakota Dunes Boulevard

    1 mi · 2 min · Dakota Dunes Boulevard

  13. 13

    Enter the roundabout and take exit 3 toward East Sawgrass Trail

    843 ft · 25 sec · East Sawgrass Trail

  14. 14

    Exit the roundabout onto East Sawgrass Trail

    2280 ft · 2 min · East Sawgrass Trail

  15. 15

    Turn right onto Pebble Beach Drive

    130 m · 20 sec · Pebble Beach Drive

  16. 16

    Turn right onto North Royal Troon

    749 ft · 39 sec · North Royal Troon

  17. 17

    Turn left onto Glen Eagle Court

    74 m · 12 sec · Glen Eagle Court

  18. 18

    Continue on Glen Eagle Court

    31 m · 4 sec · Glen Eagle Court

  19. 19

    Arrive at your destination

    0 m · 1 sec · Glen Eagle Court

Car Route Details

A richer read on the saved driving route between Spearfish and Dakota Dunes.

OSRM road route
Drive Character

Long-distance drive

This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.

Directions
19 steps
7 turns on the saved route
Ramps & Exits
7
2 merges, 5 ramps or exits
Navigation Density
4 / 100 mi
Decision points by distance
Main Roads
I 90 East
467 mi · 99%
Dakota Dunes Boulevard
1.01 mi
East Sawgrass Trail
0.59 mi
East Jackson Boulevard
0.53 mi
North Royal Troon
0.14 mi
Pebble Beach Drive
0.08 mi
Longest Stretch

I 90 East

Continue straight

338 mi · 05h 20m

Route Summary

A quick read on whether this route feels easy, ambitious, or worth planning around.

Trip Read

Better with a longer stop

This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.

Drive Time
07h 36m
Overnight route
Same-Day Return
15h 12m
Round-trip wheel time
Road vs Air
+75.4 mi
394.5 mi direct line
Halfway Stop
Reliance
03h 48m from Spearfish
Leave By
8:48 PM MDT
Overnight-style route
Weather Watch

Chance Snow Showers leaving Spearfish and Slight Chance Snow Showers near Dakota Dunes.

Trip Questions

Direct answers travelers usually want before committing to the drive.

How long does it take to drive from Spearfish to Dakota Dunes?

The road trip is about 469.9 miles (756.2 km) and usually takes 07h 36m in normal driving conditions.

Is this a same-day trip or an overnight route?

This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.

What is the halfway point on this route?

Reliance is a useful midpoint, sitting about 234.5 miles from Spearfish and 235.4 miles from Dakota Dunes.

How much longer is the road route than the straight-line distance?

The direct path is about 394.5 miles (634.9 km), while the road route adds roughly 75.4 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 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.

How much will gas cost for this route?

Using about 28.3 MPG, regular gas is estimated at $62.52 one way or $125.05 round trip. Estimated CO2 is about 147.3 kg one way.

Do you cross a time zone on this route?

Yes. There is about a 1 hour time difference between Spearfish and Dakota Dunes, so arrival and return times should be read in local time.

What should you check before leaving?

Before you leave, expect Chance Snow Showers around Spearfish and Slight Chance Snow Showers near Dakota Dunes.

Flight Path Map

This map shows the direct air route between Spearfish and Dakota Dunes. Straight-line distance: 394.48 mi (634.85 km).

Spearfish

#1 Spearfish

City in Lawrence County, South Dakota, United States

Population11,900
Coordinates44.4908200, -103.8593700
Altitude1112
CountryUnited States
Photo coming soon

#2 Dakota Dunes

Township in Union County, South Dakota

Population2,540
Coordinates42.4874900, -96.4864200
Altitude334
CountryUnited States
Start: Spearfish (-103.85937, 44.49082)
End: Dakota Dunes (-96.48642, 42.48749)

Estimated Travel Time

Distance: 756 km by road

SpeedTime
30 mph (48.3 km/h)15h 39m
40 mph (64.37 km/h)11h 44m
50 mph (80.47 km/h)09h 23m
60 mph (96.56 km/h)07h 49m
70 mph (112.65 km/h)06h 42m
80 mph (129 km/h)05h 51m

Fuel, Round Trip and CO2

Estimated fuel cost and emissions for this route.

One-way fuel
16.58 gal
62.77 L · about $62.52
Round trip
$125.05
33.16 gal · 125.54 L
Estimated CO2
147.3 kg one way
Round trip: 294.7 kg / 650 lb CO2, using regular gasoline.
Fuel$/galOne wayRound trip
Regular gas $3.77 $62.52 $125.05
Mid-grade $4.25 $70.51 $141.03
Premium $4.65 $77.16 $154.33
Diesel $5.30 $87.94 $175.88

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 South Dakota · Apr 18, 2026

Please keep in mind that there is a 1 hour time gap between Spearfish, SD and Dakota Dunes, SD. The current time in Spearfish is 00:18:59, although it is 01:18:59 in Dakota Dunes.

Distance to Other Cities

Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.

How did we calculate? Place names are translated into coordinates. The Haversine formula calculates straight-line distance; driving distance uses road network data.