Spanning 458.8 miles across South Dakota, this trek from Milbank to Rapid City takes approximately 7 hours and 40 minutes of pure drive time. Since the entire journey stays within the Great Plains, you can expect a consistent landscape as you transition across the state. While it is technically possible to complete this trip in a single day, be prepared for a long stint behind the wheel. Budgeting roughly $70 for fuel is a smart move for this distance. Given the duration, you will want to plan your departure carefully to avoid fatigue, though the route is straightforward for those comfortable with interstate travel.
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
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
229.4 miles from Milbank, SD
A natural place for your longest stop of the day
, about 4h 1m into the drive
.
Main Roads
Road
Distance
Duration
I 90
338.7 mi
5h 20m
I 29
66.1 mi
1h 2m
SD Highway 15
39.7 mi
55m
US Highway 212
4.8 mi
7m
SD Highway 28
4 mi
6m
I 190
1.4 mi
1m
3rd Avenue North
1.1 mi
1m
South Dakota Street
1 mi
1m
Longest stretch:
I 90
— 338.7 mi, about 5h 20m
Turn-by-Turn Driving Directions
Step-by-step road directions between Milbank, SD and Rapid City, SD.
1
Start on US 12
0.3 mi·26 sec·East 4th Avenue
2
Turn left onto South Dakota Street
1.0 mi·1 min·South Dakota Street
3
Continue on SD 15
19 mi·27 min·SD Highway 15
4
Turn right onto US 212; SD 15
4.8 mi·7 min·US Highway 212
5
Turn left onto SD 15
9.1 mi·13 min·SD Highway 15
6
Continue on SD 15
1.1 mi·1 min·3rd Avenue North
7
Continue on SD 15
12 mi·13 min·SD Highway 15
8
Turn right onto SD 15; SD 28
4.0 mi·6 min·SD Highway 28
9
Take the ramp
0.3 mi·38 sec
10
Merge onto I 29
66 mi·1 hr 2 min·I 29
11
Take the exit
0.5 mi·1 min
Toward Interstate 90 West: Rapid City
12
Merge onto I 90
339 mi·5 hr 20 min·I 90
13
Take the exit
0.4 mi·1 min
Toward I 190, US 16: Downtown, Black Hawk National Forest, Mount Rushmore
14
Continue on I 190
1.4 mi·1 min·I 190
15
Turn left onto US 16; SD 44
0.2 mi·39 sec·Omaha Street
Use the right lane.
16
Turn right onto US 16
0.2 mi·45 sec·Mount Rushmore Road
Use the right lane.
17
Arrive at destination
US 16
Trip Plan
To make the 458.8-mile journey more manageable, try to plan for at least two dedicated stops to stretch your legs and refresh. Since the longest segment of your drive covers 338.7 miles on I-90, ensure your vehicle is fueled up before hitting that stretch to avoid any mid-route stress. Getting an early start is the best way to ensure you reach Rapid City with plenty of daylight remaining. Keep an eye on your fuel gauge throughout the trip, as the $70 cost estimate can fluctuate based on your vehicle's efficiency. Because this is a long-distance haul, prioritizing consistent hydration and movement during your two planned stops will make the time pass much faster.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 229.4 miles from Milbank, SD, or about 4h 1m into the drive.
The longest continuous stretch on this route runs about 338.7 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 101 miles or 1h 59m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 229.4 miles or 4h 1m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 6h 41m
Traffic, exits, and arrival timing usually matter more near Rapid City, SD than in the middle of the route.
Before You Leave
+
Open the route before leaving Milbank, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Milbank, SD
This is one driving day of about 458.8 miles and 7h 40m.
Your first comfortable stop window is around 101 miles from Milbank, SD.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on I 90 for about 338.7 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 0.3 and 458.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.3 mi into trip|~0m in|South Dakota Street
Turn left onto South Dakota Street
Navigation decision point
4
20 mi into trip|~29m in|US 212; SD 15 / US Highway 212
Turn right onto US 212; SD 15 / US Highway 212
Navigation decision point
4
50.9 mi into trip|~1h 12m in
Take the ramp
Navigation decision point
5
456.5 mi into trip|~7h 36m in
Take the exit toward I 190, US 16: Downtown, Black Hawk National Forest, Mount Rushmore
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 190, US 16: Downtown, Black Hawk Natio...
7
458.5 mi into trip|~7h 39m in|US 16 / Mount Rushmore Road
Turn right onto US 16 / Mount Rushmore Road
Lane positioning matters here
Use the right lane.
Fuel & Cost
Regular Gas
$71.73 one way
$143.46 round trip
$3.97/gal25.4 MPG avg161 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$78.75
$157.51
premium
$4.89
$88.29
$176.58
diesel
$5.61
$101.30
$202.59
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$72
Meals
$25–$50
Total
$97–$122
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 160.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $48 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
137.6
1
$48.17
$22.02
Efficient EV
114.7
1
$40.14
$18.35
EV Truck/SUV
183.5
2
$64.23
$29.36
Gas CO2
161 kg
EV CO2
54 kg (66% 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 Apr 15, 2026
Origin
Milbank, SD
Evening
in Milbank on Saturday
Local time
8:11 PM
CDT
Current temp
71°F
Unavailable
Live forecast
Destination
Rapid City, SD
Evening
in Rapid City on Saturday
Local time
7:11 PM
MDT
Current temp
78°F
Unavailable
Live forecast
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 earlier
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
7 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
7h 40m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
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...
18 mi from route
~44 min detour
Free
near mile 458.8
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 395.5
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This trip is heavily highway-focused, with 99% of your journey spent on high-speed roads. You will utilize a combination of SD Highway 15, I-29, and I-90 to navigate the state efficiently. The vast majority of your time—specifically 338.7 miles—is spent on the long, uninterrupted stretch of I-90. Expect a practical, no-nonsense driving experience that favors speed and directness over technical or winding roads. Because the route relies so heavily on major interstates, you can maintain a steady pace throughout the duration of your trip.
99% highway — fuel and pacing are the main things to plan.
17 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 338.7 mi on I 90.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 90 and I 29. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.3 miles in near South Dakota Street.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
The route itself is not hard, but at 7h 40m, endurance matters. Plan breaks every 2-3 hours. The 11 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 0.3 miles (South Dakota Street): Navigation decision point; at 20 miles (US 212; SD 15 / US Highway 212): Navigation decision point; at 50.9 miles: Navigation decision point.
Elevation Profile
Gently rolling terrain
3,243 ft1,153 ft
Total Climb
2,546 ft
Total Descent
456 ft
Highest Point
3,243 ft
~458.8 mi in
Elevation Range
2,090 ft
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 7h 40m. Total distance: 458.8 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
The longest stretch is about 338.7 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.
It helps. This is a long drive, so arriving tired and in the dark compounds. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Rapid City, SD before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 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 0.3 miles (South Dakota Street): Navigation decision point; at 20 miles (US 212; SD 15 / US Highway 212): Navigation decision point; at 50.9 miles: Navigation decision point.
Yes — Mount Rushmore National Memorial and Badlands National Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 7.7 hours each way, a round trip means 15.4 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Rapid City, SD before the return drive.
