How far is Spearfish, SD from Custer, SD?
The driving distance from Spearfish, SD to Custer, SD is about 71.1 miles (114.4 km), with a travel time of about 01h 43m by car.
- The straight-line flight distance is about 51.7 miles (83.2 km).
- For a round trip, plan for roughly 03h 26m 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 01h 43m.
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.
City in Meade County, South Dakota, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain And Snow Showers
Rain And Snow Likely
Driving Route Map
The map below follows the saved road route between Spearfish and Custer.
Turn-by-Turn Driving Directions
Step-by-step road directions between Spearfish and Custer.
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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
5.2 mi · 5 min
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6
Take the exit slight right toward US 85 South: Deadwood, Lead
1645 ft · 42 sec
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7
Turn right onto US Highway 85
7.3 mi · 8 min · US Highway 85
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8
At the end of the road, turn right onto Main Street
1.3 km · 1 min · Main Street
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9
Continue on Pioneer Way
2686 ft · 43 sec · Pioneer Way
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10
Turn left onto Pine Street
125 m · 10 sec · Pine Street
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11
Turn right onto Sherman Street
1 km · 59 sec · Sherman Street
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12
Continue on Cliff Street
1.1 mi · 2 min · Cliff Street
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13
Turn left onto US Highway 385
19.8 mi · 29 min · US Highway 385
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14
Continue on Highway 385
16.7 mi · 25 min · Highway 385
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15
Take the ramp straight
117 m · 7 sec
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16
Merge slight left onto Highway 385
3 mi · 5 min · Highway 385
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17
Continue on East Main Street
1.4 mi · 3 min · East Main Street
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18
Continue on Highway 385
6.1 mi · 8 min · Highway 385
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19
Continue on US Highway 16/385
6 mi · 8 min · US Highway 16/385
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20
Continue on North 5th Street
1.1 mi · 3 min · North 5th Street
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21
Turn left onto Mount Rushmore Road
128 m · 10 sec · Mount Rushmore Road
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22
Arrive at your destination
0 m · 1 sec · Mount Rushmore Road
Car Route Details
A richer read on the saved driving route between Spearfish and Custer.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
US Highway 385
Turn left onto US Highway 385
19.8 mi · 00h 29m
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 And Snow Showers leaving Spearfish and Rain And Snow Likely near Custer.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Spearfish to Custer?
The road trip is about 71.1 miles (114.4 km) and usually takes 01h 43m 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?
Piedmont is a useful midpoint, sitting about 35.5 miles from Spearfish and 35.6 miles from Custer.
How much longer is the road route than the straight-line distance?
The direct path is about 51.7 miles (83.2 km), while the road route adds roughly 19.4 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 8:00 AM to 10:00 AM MDT. If you want a more comfortable same-day return, try to leave by 3:04 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $9.47 one way or $18.93 round trip. Estimated CO2 is about 22.3 kg one way.
What should you check before leaving?
Before you leave, expect Rain And Snow Showers around Spearfish and Rain And Snow Likely near Custer.
Flight Path Map
This map shows the direct air route between Spearfish and Custer. Straight-line distance: 51.68 mi (83.17 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 Custer
City in and county seat of Custer County, South Dakota, United States
| Population | 1,926 |
| Coordinates | 43.7666500, -103.5988100 |
| Altitude | 1620 |
| Country | United States |
End: Custer (-103.59881, 43.76665)
Estimated Travel Time
Distance: 114 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 22m |
| 40 mph (64.37 km/h) | 01h 46m |
| 50 mph (80.47 km/h) | 01h 25m |
| 60 mph (96.56 km/h) | 01h 11m |
| 70 mph (112.65 km/h) | 01h 00m |
| 80 mph (129 km/h) | 00h 53m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $9.47 | $18.93 |
| Mid-grade | $4.25 | $10.68 | $21.35 |
| Premium | $4.65 | $11.68 | $23.36 |
| Diesel | $5.30 | $13.31 | $26.63 |
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.