Crossing the expanse of South Dakota from Rapid City to Webster covers a distance of 416.9 miles. Expect to spend approximately 7 hours and 3 minutes behind the wheel to complete this journey. Because the route is entirely highway-focused, it is feasible as a long, single-day push, though you should budget about $63 for fuel. You will travel exclusively through the Great Plains, keeping you within the same regional landscape for the duration of the trip. Since you remain within state lines, this is a straightforward trek across the heart of South Dakota. Before heading out, ensure you are prepared for a full day of driving to reach your destination.
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
208.4 miles from Rapid City, SD
A natural place for your longest stop of the day
, about 3h 18m into the drive
.
Main Roads
Road
Distance
Duration
I 90
292.1 mi
4h 35m
SD Highway 25
115.1 mi
2h 14m
SD Highway 34
6 mi
7m
I 190
1.5 mi
2m
US Highway 212
0.9 mi
1m
South Main Street
0.5 mi
<1m
Mount Rushmore Road
0.2 mi
<1m
Omaha Street
0.2 mi
<1m
Longest stretch:
I 90
— 292.1 mi, about 4h 35m
Turn-by-Turn Driving Directions
Step-by-step road directions between Rapid City, SD and Webster, SD.
1
Start on US 16
0.2 mi·47 sec·Mount Rushmore Road
2
Turn left onto US 16; SD 44
0.2 mi·38 sec·Omaha Street
3
Turn right onto I 190; US 16
1.2 mi·1 min·I 190; US 16
4
Keep slight right at fork onto I 190
0.3 mi·29 sec·I 190
Exit 1BToward I 90 East: Sioux Falls
5
Continue on I 90; US 14; US 16 Truck; SD 79
292 mi·4 hr 35 min·I 90; US 14; US 16 Truck; SD 79
6
Take the exit
0.3 mi·47 sec
Toward SD 25: Emery, Farmer
7
Turn left onto SD 25
24 mi·27 min·SD Highway 25
8
Turn right onto SD 25; SD 34
6.0 mi·7 min·SD Highway 34
9
Turn left onto SD 25
60 mi·1 hr 10 min·SD Highway 25
10
At end of road, turn right onto US 212; SD 25
0.9 mi·1 min·US Highway 212
11
Turn left onto SD 25
31 mi·36 min·SD Highway 25
12
Continue on SD 25
0.5 mi·39 sec·South Main Street
13
Turn right onto East 7th Avenue
13 ft·0 sec·East 7th Avenue
14
Arrive at destination
East 7th Avenue
Trip Plan
Given the 7-hour drive time, aim for an early morning departure to avoid fatigue during the final leg of your journey. With two planned stops, you can effectively break up the 416.9-mile distance to keep yourself alert. Since the longest stretch is over 292 miles on I-90, prioritize refueling before exiting the interstate to ensure you aren't caught short on the secondary roads. Flexibility is your best asset here, so keep an eye on your fuel gauge during the shift from I-90 to SD Highway 25 and SD Highway 34. Planning your two breaks around the transition points will help maintain a steady flow throughout your day on the road.
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 208.4 miles from Rapid City, SD, or about 3h 18m into the drive.
The longest continuous stretch on this route runs about 292.1 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 92 miles or 1h 28m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 208.4 miles or 3h 18m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 53m
Traffic, exits, and arrival timing usually matter more near Webster, SD than in the middle of the route.
Before You Leave
+
Open the route before leaving Rapid City, 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 Rapid City, SD
This is one driving day of about 416.9 miles and 7h 3m.
Your first comfortable stop window is around 92 miles from Rapid City, 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 292.1 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 10
5 decision points cluster between mile 0.4 and 384.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.4 mi into trip|~1m in|I 190; US 16
Turn right onto I 190; US 16
Navigation decision point
6
1.7 mi into trip|~3m in|I 190
Keep slight right at fork onto I 190 toward I 90 East: Sioux Falls
Highway fork - watch signs carefully
Exit 1B
Toward I 90 East: Sioux Falls
5
294.1 mi into trip|~4h 39m in
Take the exit toward SD 25: Emery, Farmer
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward SD 25: Emery, Farmer
4
294.4 mi into trip|~4h 40m in|SD 25 / SD Highway 25
Turn left onto SD 25 / SD Highway 25
Navigation decision point
5
384.2 mi into trip|~6h 25m in|US 212; SD 25 / US Highway 212
At end of road, turn right onto US 212; SD 25 / US Highway 212
Navigation decision point
Fuel & Cost
Regular Gas
$65.18 one way
$130.36 round trip
$3.97/gal25.4 MPG avg146 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$71.56
$143.12
premium
$4.89
$80.23
$160.46
diesel
$5.61
$92.05
$184.09
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$65
Meals
$25–$50
Total
$90–$115
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 145.9 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $44 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
125.1
1
$43.77
$20.01
Efficient EV
104.2
1
$36.48
$16.68
EV Truck/SUV
166.8
2
$58.37
$26.68
Gas CO2
146 kg
EV CO2
49 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
Rapid City, SD
Evening
in Rapid City on Saturday
Local time
7:08 PM
MDT
Current temp
78°F
Unavailable
Live forecast
Destination
Webster, SD
Evening
in Webster on Saturday
Local time
8:08 PM
CDT
Current temp
67°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 later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
11 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
7h 3m 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...
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...
25 mi from route
~62 min detour
$30
near mile 57.5
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This journey is defined by a heavy reliance on high-speed travel, with highways accounting for 100% of your transit. You will spend the vast majority of your time on I-90, which provides a long, uninterrupted stretch of 292.1 miles. Transitioning from the interstate onto SD Highway 34 and SD Highway 25 shifts the rhythm of the drive, requiring more attention as you move onto these secondary roads. You can expect a consistent, highway-focused pace that favors efficiency over technical maneuvering. The road's personality remains steady, offering a reliable path through the open terrain of the state.
100% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 292.1 mi on I 90.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 90 and SD Highway 25. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.4 miles in near I 190; US 16.
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 3m, endurance matters. Plan breaks every 2-3 hours. The 10 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 0.4 miles (I 190; US 16): Navigation decision point; at 1.7 miles (I 190): Highway fork - watch signs carefully; at 294.1 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Elevation Profile
Gently rolling terrain
3,243 ft1,737 ft
Total Climb
0 ft
Total Descent
1,507 ft
Highest Point
3,243 ft
Elevation Range
1,507 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Rapid City, SD to Webster, SD, road signs begin pointing toward Farmer along the way.
Farmer
294.1 mi in|~4h 39m
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 7h 3m. Total distance: 416.9 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
The longest stretch is about 292.1 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 Webster, 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 0.4 miles (I 190; US 16): Navigation decision point; at 1.7 miles (I 190): Highway fork - watch signs carefully; at 294.1 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
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 7.1 hours each way, a round trip means 14.1 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Webster, SD before the return drive.
