The drive from Spearfish, SD to Mobridge, SD covers 237.5 miles and takes about 5h 23m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on SD Highway 34, Main Street, State Highway 73 for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 76.2 miles on SD Highway 34.
At current regular gas prices, budget about $37.13 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
118.8 miles from Spearfish, SD
A natural place for your longest stop of the day
, about 2h 22m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 5h 23m. Total distance: 237.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
This is a 5h 23m highway drive covering 237.5 miles, with most of the trip on SD Highway 34 and Main Street. The longest continuous stretch is about 76.2 miles on SD Highway 34.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 22 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
SD Highway 34 is the longest continuous segment at about 76.2 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on SD Highway 34 and Main Street. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near East Jackson Boulevard.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 5h 23m drive. You will face about 11 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start (East Jackson Boulevard): Navigation decision point; at 0.6 miles: Multiple destination signs - pick the right one; at 97 miles (SD 73 / State Highway 73): Navigation decision point.
Critical Maneuvers
5 of 11 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
4
0 mi into trip|~0m in|East Jackson Boulevard
Turn right onto East Jackson Boulevard
Navigation decision point
5
0.6 mi into trip|~2m in
Take the ramp toward I 90 East, US 85 South
Multiple destination signs - pick the right one
Toward I 90 East, US 85 South
4
97 mi into trip|~1h 50m in|SD 73 / State Highway 73
Turn left onto SD 73 / State Highway 73
Navigation decision point
5
174.3 mi into trip|~3h 52m in|SD 20; SD 65 / State Highway 20
At end of road, turn right onto SD 20; SD 65 / State Highway 20
Navigation decision point
5
229.1 mi into trip|~5h 13m in|US 12; SD 20 / US Highway 12
At end of road, turn right onto US 12; SD 20 / US Highway 12
Place data sourced from public business listings. Hours and availability may vary.
Fuel & Cost
Regular Gas
$37.13 one way
$74.26 round trip
$3.97/gal25.4 MPG avg83 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$40.77
$81.54
premium
$4.89
$45.70
$91.41
diesel
$5.61
$52.44
$104.87
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$37
Meals
$25–$50
Total
$62–$87
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 83.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
EV Charging Along Route
5 DC fast chargers
· Coverage: good
ChargePoint Charging Station
Spearfish, South Dakota
ChargePoint
1 DCFC
Red E Charging Station
Spearfish, South Dakota
Other
1 DCFC
Red E Charging Station
Mobridge, South Dakota
Other
1 DCFC
Tesla Supercharger
Spearfish, South Dakota
Tesla
1 DCFC
ChargePoint Charging Station
Spearfish, South Dakota
ChargePoint
1 DCFC
ChargePoint: 2
Other: 2
Tesla: 1
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $25 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
71.3
0
$24.94
$11.40
Efficient EV
59.4
0
$20.78
$9.50
EV Truck/SUV
95
1
$33.25
$15.20
Gas CO2
83 kg
EV CO2
28 kg (66% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Spearfish, SD
Morning
in Spearfish on Saturday
Local time
6:14 AM
MDT
Current temp
73°F
Unavailable
Live forecast
Destination
Mobridge, SD
Morning
in Mobridge on Saturday
Local time
7:14 AM
CDT
Current temp
45°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
28 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 23m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Spearfish, SD to Mobridge, SD covers 237.5 miles and takes about 5h 23m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are SD Highway 34, Main Street, State Highway 73. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 118.8 miles from Spearfish, SD. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $37.13 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a straightforward 5h 23m drive. You will face about 11 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: near the start (East Jackson Boulevard): Navigation decision point; at 0.6 miles: Multiple destination signs - pick the right one; at 97 miles (SD 73 / State Highway 73): Navigation decision point.
The route from Spearfish, SD to Mobridge, SD does not surface many named destination signs beyond the main corridor.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, NREL for EV charging, and NPS for national parks. See our methodology for refresh cadence and limitations.
