Custer, SD to Mitchell, SD is 316.3 miles and takes about 5h 21m via I 90, with a fuel budget near $50 and enough daylight to finish in a day. This trip stays within the Great Plains region, offering a straightforward drive across South Dakota. With 95% of the route on highways, it's primarily a fast-paced transit. You'll be on the road for over five hours, so plan for a full day of driving.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
158.1 miles from Custer, SD
A natural place for your longest stop of the day
, about 2h 48m into the drive
.
Main Roads
Road
Distance
Duration
I 90
268 mi
4h 12m
South Highway 16
17.7 mi
21m
Highway 385
9.2 mi
13m
US Highway 16/385
6 mi
7m
Elk Vale Road
5.3 mi
7m
Catron Boulevard
3.3 mi
4m
North 5th Street
1.1 mi
2m
Mount Rushmore Road
1.1 mi
1m
Longest stretch:
I 90
— 268 mi, about 4h 12m
Traffic on I-90
Hour-of-day weekday pattern from 23 FHWA count stations on your route.
Peak
1 PM
~267 veh/hr typical
· worst 510
Quietest
2 AM
~20 veh/hr
Peak-to-quiet ratio
13.4×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Custer, SD and Mitchell, SD.
1
Start on US 16A; SD 89
421 ft·18 sec·Mount Rushmore Road
2
Turn right onto US 16; US 385
1.1 mi·2 min·North 5th Street
3
Continue on US 16; US 385
6.0 mi·7 min·US Highway 16/385
4
Continue on US 16; US 385
6.1 mi·8 min·Highway 385
5
Continue on US 16; US 385
0.2 mi·32 sec·Main Street
6
Take the exit onto US 16 Truck; US 385 Truck
0.6 mi·1 min·Railroad Avenue
7
Turn right onto US 16; US 385
0.6 mi·1 min·East Main Street
8
Continue on US 16; US 385
3.0 mi·4 min·Highway 385
9
Continue on US 16; US 385
18 mi·21 min·South Highway 16
10
Continue on US 16
1.0 mi·1 min·Mount Rushmore Road
11
Take the exit onto US 16 Truck
0.1 mi·12 sec·US 16 Truck
12
Merge onto US 16 Truck
3.3 mi·4 min·Catron Boulevard
13
Continue on US 16 Truck
5.3 mi·7 min·Elk Vale Road
14
Take the exit
0.5 mi·1 min
15
Merge onto I 90; US 14
268 mi·4 hr 12 min·I 90; US 14
16
Take the exit onto I 90 Business
0.4 mi·53 sec·I 90 Business
17
Turn left onto I 90 Business; SD 37
0.8 mi·1 min·South Ohlman Street
18
Take the exit
302 ft·8 sec
19
Turn straight onto I 90 Business
0.8 mi·2 min·West Havens Avenue
20
Turn left onto South Sanborn Boulevard
0.5 mi·1 min·South Sanborn Boulevard
21
Turn left onto West 1st Avenue
34 ft·1 sec·West 1st Avenue
22
Arrive at destination
West 1st Avenue
Trip Plan
Given the 5 hour 21 minute drive time, leaving in the morning is your best bet to maximize daylight. While this route is doable in one day, you might consider a brief stop around the halfway point for a stretch or a quick meal. Keep an eye on your fuel as you'll cover 316.3 miles, and the estimated cost is $50. Since the majority of the drive is on I 90, pay attention to exit numbers as you approach your destination in Mitchell.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 158.1 miles from Custer, SD, or about 2h 48m into the drive.
The longest continuous stretch on this route runs about 268 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 70 miles or 1h 25m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 158.1 miles or 2h 48m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 24m
Traffic, exits, and arrival timing usually matter more near Mitchell, SD than in the middle of the route.
Before You Leave
+
Open the route before leaving Custer, SD so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Custer, SD
This is one driving day of about 316.3 miles and 5h 21m.
Your first comfortable stop window is around 70 miles from Custer, SD.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 90 for about 268 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 11
5 decision points cluster between mile 0.1 and 316.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.1 mi into trip|~0m in|US 16; US 385 / North 5th Street
Turn right onto US 16; US 385 / North 5th Street
Navigation decision point
3
13.5 mi into trip|~19m in|US 16 Truck; US 385 Truck / Railroad Avenue
Take the exit onto US 16 Truck; US 385 Truck / Railroad Avenue
Exit ramp - move to the correct lane early
4
314.1 mi into trip|~5h 16m in|I 90 Business; SD 37 / South Ohlman Street
Turn left onto I 90 Business; SD 37 / South Ohlman Street
Navigation decision point
4
315.8 mi into trip|~5h 19m in|South Sanborn Boulevard
Turn left onto South Sanborn Boulevard
Navigation decision point
4
316.3 mi into trip|~5h 21m in|West 1st Avenue
Turn left onto West 1st Avenue
Navigation decision point
Fuel & Cost
Regular Gas
$46.71 one way
$93.42 round trip
$3.75/gal25.4 MPG avg111 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$51.57
$103.13
premium
$4.72
$58.73
$117.45
diesel
$4.80
$59.72
$119.45
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$47
Meals
$25–$50
Total
$72–$97
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 110.7 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $33 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
94.9
1
$33.21
$15.18
Efficient EV
79.1
0
$27.68
$12.65
EV Truck/SUV
126.5
1
$44.28
$20.24
Gas CO2
111 kg
EV CO2
37 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Jul 17, 2026
Origin
Custer, SD
Late night
in Custer on Sunday
Local time
1:46 AM
MDT
Current temp
87°F
Mostly Sunny then Chance Showers And Thunderstorms
NE 5 to 8 mph39% chanceLive forecast
Heat Advisory
Heat Advisory issued July 17 at 11:04AM CDT until July 17 at 9:00PM CDT by NWS Aberdeen SD
Heat Advisory
Heat Advisory issued July 17 at 10:31AM CDT until July 17 at 9:00PM CDT by NWS Sioux Falls SD
Destination
Mitchell, SD
Late night
in Mitchell on Sunday
Local time
2:46 AM
CDT
Current temp
99°F
Sunny
SSW 5 to 10 mph0% chanceLive forecast
Heat Advisory
Heat Advisory issued July 17 at 11:04AM CDT until July 17 at 9:00PM CDT by NWS Aberdeen SD
Heat Advisory
Heat Advisory issued July 17 at 10:31AM CDT until July 17 at 9:00PM CDT by NWS Sioux Falls SD
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
12 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 21m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Mount Rushmore National Memorial
National Memorial
Majestic figures of George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln, surrounded by the beauty of the Black Hills of South Dakota, tell the story of the birth, growth, devel...
Immerse yourself in one of the longest caves in the world. With over 220 miles of mapped and surveyed passages, this underground wilderness appeals to human curiosity. Its splendor is revealed through...
Wind Cave National Park protects two very different worlds - one deep within the earth, the other a sunlit world of many resources. Bison, elk, and other wildlife roam the rolling prairie grasslands a...
The rugged beauty of the Badlands draws visitors from around the world. These striking geologic deposits contain one of the world’s richest fossil beds. Ancient horses and rhinos once roamed here. The...
24 mi from route
~61 min detour
$30
near mile 98.2
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect to spend nearly all your time on the highway, with 95% of the 316.3 miles on major interstates and state routes. The longest continuous stretch without significant changes is 268 miles on I 90. You'll encounter frequent exits on I 90 before transitioning to more rural surface roads in the latter part of your drive. This route is designed for efficient travel.
95% highway — fuel and pacing are the main things to plan.
22 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 268 mi on I 90.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 90 and South Highway 16. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.1 miles in near US 16; US 385 / North 5th Street.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 5h 21m drive. You will face about 11 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 0.1 miles (US 16; US 385 / North 5th Street): Navigation decision point; at 13.5 miles (US 16 Truck; US 385 Truck / Railroad Avenue): Exit ramp - move to the correct lane early; at 314.1 miles (I 90 Business; SD 37 / South Ohlman Street): Navigation decision point.
Custer is a city in the southern Black Hills of South Dakota, the first city founded in the region. The city lines were laid out by the notorious Al Swearengen who was portrayed in the popular HBO series, Deadwood.
Top landmarks
•Custer County Courthouse — courthouse in Custer, South Dakota, United States
Mitchell is a city in Southeast South Dakota on Interstate 90 about 75 miles (121 km) west of Sioux Falls. Mitchell is located in the heart of South Dakota, with rich rolling farmland leading into wide open prairies.
Top landmarks
•Koch Apartments — apartment building in Mitchell, United States of America
The longest stretch is about 268 miles on I 90. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
Mostly yes along the main roads, but rural stretches through SD can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: at 0.1 miles (US 16; US 385 / North 5th Street): Navigation decision point; at 13.5 miles (US 16 Truck; US 385 Truck / Railroad Avenue): Exit ramp - move to the correct lane early; at 314.1 miles (I 90 Business; SD 37 / South Ohlman Street): Navigation decision point.
Yes — Mount Rushmore National Memorial, Jewel Cave National Monument and Wind Cave National Park (4 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.4 hours each way, a round trip means 10.7 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Mitchell, SD before the return drive.
