How far is Custer, SD from Rapid City, SD?
The driving distance from Custer, SD to Rapid City, SD is about 41.1 miles (66.2 km), with a travel time of about 00h 47m by car.
- The straight-line flight distance is about 28.4 miles (45.7 km).
- For a round trip, plan for roughly 01h 34m 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 00h 47m.
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.
Town in Pennington County, South Dakota
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Slight Chance Showers And Thunderstorms
Partly Sunny then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Custer and Rapid City.
Turn-by-Turn Driving Directions
Step-by-step road directions between Custer and Rapid City.
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1
Start on Mount Rushmore Road
128 m · 19 sec · Mount Rushmore Road
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2
Turn right onto North 5th Street
1.1 mi · 3 min · North 5th Street
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3
Continue on US Highway 16/385
6 mi · 8 min · US Highway 16/385
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4
Continue on Highway 385
6.1 mi · 8 min · Highway 385
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5
Continue on Main Street
1315 ft · 32 sec · Main Street
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6
Take the exit slight right toward Railroad Avenue
2982 ft · 1 min · Railroad Avenue
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7
Turn right onto East Main Street
2914 ft · 1 min · East Main Street
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8
Continue on Highway 385
3 mi · 5 min · Highway 385
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9
Continue on South Highway 16
17.7 mi · 22 min · South Highway 16
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10
Continue on Mount Rushmore Road
5.7 mi · 10 min · Mount Rushmore Road
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11
Arrive at your destination
0 m · 1 sec · Mount Rushmore Road
Car Route Details
A richer read on the saved driving route between Custer and Rapid City.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
South Highway 16
Continue on South Highway 16
17.7 mi · 00h 22m
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.
Partly Sunny then Slight Chance Showers And Thunderstorms leaving Custer and Partly Sunny then Slight Chance Showers And Thunderstorms near Rapid City.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Custer to Rapid City?
The road trip is about 41.1 miles (66.2 km) and usually takes 00h 47m 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?
Keystone is a useful midpoint, sitting about 20.6 miles from Custer and 20.6 miles from Rapid City.
How much longer is the road route than the straight-line distance?
The direct path is about 28.4 miles (45.7 km), while the road route adds roughly 12.7 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 4:56 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.47 one way or $10.94 round trip. Estimated CO2 is about 12.9 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Slight Chance Showers And Thunderstorms around Custer and Partly Sunny then Slight Chance Showers And Thunderstorms near Rapid City.
Flight Path Map
This map shows the direct air route between Custer and Rapid City. Straight-line distance: 28.38 mi (45.67 km).
#1 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 |
#2 Rapid City
The second most populous city in South Dakota.
| Population | 77,503 |
| Coordinates | 44.0805400, -103.2310100 |
| Altitude | 988 |
| Country | United States |
End: Mount Rushmore Road (-103.231059, 44.080547)
Estimated Travel Time
Distance: 66 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 22m |
| 40 mph (64.37 km/h) | 01h 01m |
| 50 mph (80.47 km/h) | 00h 49m |
| 60 mph (96.56 km/h) | 00h 41m |
| 70 mph (112.65 km/h) | 00h 35m |
| 80 mph (129 km/h) | 00h 30m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $5.47 | $10.94 |
| Mid-grade | $4.25 | $6.17 | $12.33 |
| Premium | $4.65 | $6.75 | $13.50 |
| Diesel | $5.30 | $7.69 | $15.38 |
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 22, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.