How far is Porcupine, SD from Spearfish, SD?
The driving distance from Porcupine, SD to Spearfish, SD is about 132.2 miles (212.8 km), with a travel time of about 02h 29m by car.
- The straight-line flight distance is about 115.2 miles (185.4 km).
- For a round trip, plan for roughly 04h 58m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 29m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Human settlement in Pennington County, South Dakota, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain Showers
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Porcupine and Spearfish.
Turn-by-Turn Driving Directions
Step-by-step road directions between Porcupine and Spearfish.
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1
Start on Eagle Drive
9 m · 2 sec · Eagle Drive
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2
Turn right onto Main Street
38 m · 8 sec · Main Street
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3
Turn right onto Big Foot Trail
19.2 mi · 46 min · Big Foot Trail
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4
Continue on Bureau of Indian Affairs Highway 2
6.8 mi · 16 min · Bureau of Indian Affairs Highway 2
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5
Continue on Big Foot Trail
7.9 mi · 19 min · Big Foot Trail
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6
Continue on Bombing Range Road
6.8 mi · 16 min · Bombing Range Road
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7
Continue on Main Street
2073 ft · 1 min · Main Street
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8
At the end of the road, turn left onto East Highway 44
37.8 mi · 1 hr 2 min · East Highway 44
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9
Turn right onto Jolly Lane
1.1 km · 2 min · Jolly Lane
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10
Turn left onto Jubilee Lane
1293 ft · 39 sec · Jubilee Lane
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11
Turn right onto Elk Vale Road
2.1 mi · 3 min · Elk Vale Road
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12
Take the exit straight
2533 ft · 1 min
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13
Merge slight left
3.7 mi · 4 min
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14
Continue straight
31 mi · 31 min
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15
Continue straight
14.2 mi · 14 min
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16
Take the exit slight right toward Jackson Boulevard, Black Hills State University
1541 ft · 43 sec
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17
Turn left onto East Jackson Boulevard
1 km · 2 min · East Jackson Boulevard
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18
Turn left onto North Main Street
45 m · 14 sec · North Main Street
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19
Arrive at your destination
0 m · 1 sec · North Main Street
Car Route Details
A richer read on the saved driving route between Porcupine and Spearfish.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
East Highway 44
At the end of the road, turn left onto East Highway 44
37.8 mi · 01h 02m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Rain Showers leaving Porcupine and Mostly Sunny near Spearfish.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Porcupine to Spearfish?
The road trip is about 132.2 miles (212.8 km) and usually takes 02h 29m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
New Underwood is a useful midpoint, sitting about 66 miles from Porcupine and 66.2 miles from Spearfish.
How much longer is the road route than the straight-line distance?
The direct path is about 115.2 miles (185.4 km), while the road route adds roughly 17 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 8:00 AM to 10:00 AM MDT. If you want a more comfortable same-day return, try to leave by 1:32 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.77 one way or $39.54 round trip. Estimated CO2 is about 41.5 kg one way.
What should you check before leaving?
Before you leave, expect Rain Showers around Porcupine and Mostly Sunny near Spearfish.
Flight Path Map
This map shows the direct air route between Porcupine and Spearfish. Straight-line distance: 115.19 mi (185.38 km).
#1 Porcupine
Situated on the Pine Ridge Indian Reservation in southwestern South Dakota, this census-designated place lies within Oglala Lakota County at an elevation of 3,192 feet.
| Population | 0 |
| Coordinates | 43.2397100, -102.3309900 |
| Altitude | 973 |
| Country | United States |
#2 Spearfish
City in Lawrence County, South Dakota, United States
| Population | 11,900 |
| Coordinates | 44.4908200, -103.8593700 |
| Altitude | 1112 |
| Country | United States |
End: North Main Street (-103.859186, 44.490846)
Estimated Travel Time
Distance: 213 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 24m |
| 40 mph (64.37 km/h) | 03h 18m |
| 50 mph (80.47 km/h) | 02h 38m |
| 60 mph (96.56 km/h) | 02h 12m |
| 70 mph (112.65 km/h) | 01h 53m |
| 80 mph (129 km/h) | 01h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.23 | $19.77 | $39.54 |
| Mid-grade | $4.46 | $20.82 | $41.65 |
| Premium | $5.05 | $23.59 | $47.18 |
| Diesel | $6.01 | $28.06 | $56.11 |
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 · Oct 15, 2026