How far is Spearfish, SD from Jefferson, SD?
The driving distance from Spearfish, SD to Jefferson, SD is about 460.5 miles (741.1 km), with a travel time of about 07h 23m by car.
- The straight-line flight distance is about 388 miles (624.4 km).
- For a round trip, plan for roughly 14h 47m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
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.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
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 23m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
City in and county seat of Lyman County, South Dakota, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Snow Showers
Slight Chance Snow Showers
Driving Route Map
The map below follows the saved road route between Spearfish and Jefferson.
Turn-by-Turn Driving Directions
Step-by-step road directions between Spearfish and Jefferson.
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1
Start on North Main Street
26 m · 30 sec · North Main Street
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2
Continue on North Main Street
51 m · 10 sec · North Main Street
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3
Turn right onto East Jackson Boulevard
2777 ft · 2 min · East Jackson Boulevard
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4
Take the ramp right toward I 90 East, US 85 South
1555 ft · 38 sec
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5
Merge slight left
14.2 mi · 14 min
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6
Continue straight
7.6 mi · 8 min
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7
Continue straight
23.6 mi · 24 min
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8
Continue straight
338.5 mi · 5 hr 20 min
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9
Take the exit slight right
2349 ft · 57 sec
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10
Merge slight left
74.1 mi · 1 hr 12 min
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11
Take the exit slight right toward Jefferson
791 ft · 22 sec
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12
Turn left onto 330th Street
122 m · 8 sec · 330th Street
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13
Continue on West Dakota Street
1.2 km · 1 min · West Dakota Street
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14
Turn right onto Main Street
1163 ft · 25 sec · Main Street
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15
Turn right onto South 3rd Street
17 m · 2 sec · South 3rd Street
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16
Arrive at your destination
0 m · 1 sec · South 3rd Street
Car Route Details
A richer read on the saved driving route between Spearfish and Jefferson.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
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.
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.
Chance Snow Showers leaving Spearfish and Slight Chance Snow Showers near Jefferson.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Spearfish to Jefferson?
The road trip is about 460.5 miles (741.1 km) and usually takes 07h 23m 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?
Kennebec is a useful midpoint, sitting about 229.8 miles from Spearfish and 230.7 miles from Jefferson.
How much longer is the road route than the straight-line distance?
The direct path is about 388 miles (624.4 km), while the road route adds roughly 72.5 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 $61.28 one way or $122.56 round trip. Estimated CO2 is about 144.4 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Spearfish and Jefferson, 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 Jefferson.
Flight Path Map
This map shows the direct air route between Spearfish and Jefferson. Straight-line distance: 388 mi (624.43 km).
#1 Spearfish
City in Lawrence County, South Dakota, United States
| Population | 11,900 |
| Coordinates | 44.4908200, -103.8593700 |
| Altitude | 1112 |
| Country | United States |
#2 Jefferson
City in South Dakota, United States
| Population | 1,159 |
| Coordinates | 42.6025000, -96.5592000 |
| Altitude | 340 |
| Country | United States |
End: Jefferson (-96.5592, 42.6025)
Estimated Travel Time
Distance: 741 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 15h 20m |
| 40 mph (64.37 km/h) | 11h 30m |
| 50 mph (80.47 km/h) | 09h 12m |
| 60 mph (96.56 km/h) | 07h 40m |
| 70 mph (112.65 km/h) | 06h 34m |
| 80 mph (129 km/h) | 05h 44m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $61.28 | $122.56 |
| Mid-grade | $4.25 | $69.11 | $138.22 |
| Premium | $4.65 | $75.63 | $151.26 |
| Diesel | $5.30 | $86.19 | $172.38 |
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
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.