How far is Spearfish, SD from Webster, SD?
The driving distance from Spearfish, SD to Webster, SD is about 404.7 miles (651.3 km), with a travel time of about 07h 48m by car.
- The straight-line flight distance is about 315.5 miles (507.8 km).
- For a round trip, plan for roughly 15h 37m 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 48m.
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.
Township in Roberts County, South Dakota
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Slight Chance Showers And Thunderstorms
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Spearfish and Webster.
Turn-by-Turn Driving Directions
Step-by-step road directions between Spearfish and Webster.
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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
3 mi · 3 min
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7
Take the exit slight right
1650 ft · 42 sec
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8
Turn left onto Lazelle Street
2.4 mi · 3 min · Lazelle Street
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9
Continue on SD Highway 34
133.5 mi · 2 hr 32 min · SD Highway 34
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10
Continue on US Highway 14/34
36.6 mi · 42 min · US Highway 14/34
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11
Continue on West Highway 14/34
1.2 mi · 1 min · West Highway 14/34
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12
Turn left onto North Highway 83
2629 ft · 41 sec · North Highway 83
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13
Continue on West Sioux Avenue
1.5 km · 1 min · West Sioux Avenue
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14
Turn left onto South Pierre Street
788 ft · 19 sec · South Pierre Street
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15
Continue on South Euclid Avenue
1.5 km · 1 min · South Euclid Avenue
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16
Continue on North Highway 14
2.3 mi · 3 min · North Highway 14
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17
Continue on US Highway 14
14.1 mi · 16 min · US Highway 14
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18
Take the exit sharp left
100 m · 9 sec
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19
Merge slight left
36.1 mi · 41 min
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20
Turn left onto US Highway 83
30.7 mi · 35 min · US Highway 83
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21
Turn right onto US Highway 12
65.3 mi · 1 hr 14 min · US Highway 12
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22
Continue on 134th Street
6.3 mi · 7 min · 134th Street
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23
Continue on US Highway 12
2.8 mi · 3 min · US Highway 12
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24
Continue on 6th Avenue Southwest
5.1 mi · 12 min · 6th Avenue Southwest
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25
Continue on US Highway 12 East
1 mi · 1 min · US Highway 12 East
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26
Continue on 133rd Street
13 mi · 14 min · 133rd Street
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27
Continue on West Highway 12
2.6 mi · 4 min · West Highway 12
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28
Continue on US Highway 12
29 mi · 33 min · US Highway 12
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29
Continue on West Highway 12
1 mi · 1 min · West Highway 12
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30
Turn right onto Main Street
3202 ft · 47 sec · Main Street
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31
Turn left onto East 7th Avenue
4 m · 1 sec · East 7th Avenue
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32
Arrive at your destination
0 m · 1 sec · East 7th Avenue
Car Route Details
A richer read on the saved driving route between Spearfish and Webster.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
SD Highway 34
Continue on SD Highway 34
134 mi · 02h 32m
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.
Partly Sunny then Slight Chance Showers And Thunderstorms leaving Spearfish and Chance Rain Showers near Webster.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Spearfish to Webster?
The road trip is about 404.7 miles (651.3 km) and usually takes 07h 48m 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?
Alto is a useful midpoint, sitting about 201.9 miles from Spearfish and 202.8 miles from Webster.
How much longer is the road route than the straight-line distance?
The direct path is about 315.5 miles (507.8 km), while the road route adds roughly 89.2 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 $53.85 one way or $107.70 round trip. Estimated CO2 is about 126.9 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Spearfish and Webster, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Partly Sunny then Slight Chance Showers And Thunderstorms around Spearfish and Chance Rain Showers near Webster.
Flight Path Map
This map shows the direct air route between Spearfish and Webster. Straight-line distance: 315.5 mi (507.75 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 Webster
City in and county seat of Day County, South Dakota, United States
| Population | 1,694 |
| Coordinates | 45.3321800, -97.5200900 |
| Altitude | 566 |
| Country | United States |
End: Webster (-97.52009, 45.33218)
Estimated Travel Time
Distance: 651 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 29m |
| 40 mph (64.37 km/h) | 10h 07m |
| 50 mph (80.47 km/h) | 08h 05m |
| 60 mph (96.56 km/h) | 06h 44m |
| 70 mph (112.65 km/h) | 05h 46m |
| 80 mph (129 km/h) | 05h 02m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $53.85 | $107.70 |
| Mid-grade | $4.25 | $60.73 | $121.47 |
| Premium | $4.65 | $66.46 | $132.92 |
| Diesel | $5.30 | $75.74 | $151.48 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.