Origin
Rapid City, SD
Evening in Rapid City on Sunday
Local time
5:06 PM
MDT
Current temp
40°F
Unavailable
Live forecast
Trip from Rapid City, SD to Fort Thompson, SD
Drive Time
3h 35m
Distance
213.4 mi
343 km
Drive Score
9/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$32
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
3h 23m
★
6 AM
3h 36m
8 AM
4h 0m
10 AM
3h 44m
12 PM
3h 42m
3 PM
3h 46m
5 PM
3h 59m
8 PM
3h 28m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Rapid City, SD
Mike Lensing
Fort Thompson, SD
Esteban Carriazo
Trip Overview
Spanning 213.4 miles across the Great Plains, this drive from Rapid City to Fort Thompson is a straightforward journey that typically takes about 3 hours and 35 minutes. You will spend the entire trip on highways, primarily utilizing I-90 and SD-47, making this a highly efficient route for travelers. Because the drive is manageable within a single day, you likely won't need an overnight stop unless you prefer a slower pace. Budgeting approximately $32 for fuel should cover your needs for the duration of the trip. Since both your starting point and destination are located within the Great Plains, you can expect a consistent regional landscape throughout your travel. This route is an ideal choice if you prioritize highway speed and direct navigation over winding backroads.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
106.7 miles from Rapid City, SD
A natural place for your longest stop of the day , about 1h 42m into the drive .
Drive Character
Expect a focused, highway-heavy experience as you traverse the South Dakota landscape. With 100% of the route consisting of highway driving, you will spend the vast majority of your time on I-90, which accounts for a significant 190.8-mile stretch of the journey. The road maintains a consistent, high-speed personality, allowing you to cover ground quickly between the two points. Transitioning from the interstate to SD-47 marks the final phase of your drive, shifting the feel slightly as you approach Fort Thompson. Be prepared for the steady, rhythmic pace of long-distance interstate travel that defines this specific path.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 10 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 90 is the longest continuous segment at about 190.8 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 90 and SD 47. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.2 miles in near US 16; SD 44 / Omaha Street.
Route Complexity
3/10
Easy - simple navigation with a manageable amount of wheel time
This is a straightforward 3h 35m drive. You will face about 6 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 0.2 miles (US 16; SD 44 / Omaha Street): Navigation decision point; at 0.4 miles (I 190; US 16): Navigation decision point; at 1.7 miles (I 190): Highway fork - watch signs carefully.
Critical Maneuvers
5 of 6 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
3
0.2 mi into trip
|
~0m in
|
US 16; SD 44 / Omaha Street
Turn left onto US 16; SD 44 / Omaha Street
Navigation decision point
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
4
193.2 mi into trip
|
~3h 5m in
|
SD 248
Turn left onto SD 248
Navigation decision point
5
213.4 mi into trip
|
~3h 35m in
|
BIA 4 / BIA Route 4
Turn sharp right onto BIA 4 / BIA Route 4
Sharp turn - reduce speed on approach
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 90 | 190.8 mi | 3h 1m |
| SD 47 | 19.4 mi | 28m |
| I 190 | 1.5 mi | 2m |
| SD 248 | 0.8 mi | 1m |
| Mount Rushmore Road | 0.2 mi | <1m |
| Omaha Street | 0.2 mi | <1m |
| BIA Route 4 | <0.1 mi | <1m |
Longest stretch:
I 90
— 190.8 mi, about 3h 1m
Turn-by-Turn Driving Directions
Step-by-step road directions between Rapid City, SD and Fort Thompson, 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 1B
Toward I 90 East: Sioux Falls
5
Continue on I 90; US 14; US 16 Truck; SD 79
191 mi
·
3 hr 1 min
·
I 90; US 14; US 16 Truck; SD 79
Use the none lane.
6
Take the exit
0.3 mi
·
50 sec
7
Turn left onto SD 248
0.8 mi
·
1 min
·
SD 248
8
Continue on SD 47
19 mi
·
28 min
·
SD 47
9
Turn sharp right onto BIA 4
65 ft
·
1 sec
·
BIA Route 4
10
Arrive at destination
BIA 4
Trip Plan
Planning your departure is simple since the 213.4-mile trip is well-suited for a single day of travel. Because you have just one planned stop along the way, make sure to time it strategically to break up the longest 190.8-mile stretch on I-90. Keep a close eye on your fuel gauge during the interstate portion to ensure you don't run low before reaching the final leg on SD-47. Since this is an entirely highway-focused route, consider leaving during daylight hours to maintain better visibility during the long, uninterrupted sections. Flexibility is your best asset here, so feel free to adjust your single stop based on your energy levels rather than a rigid schedule.
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 106.7 miles from Rapid City, SD, or about 1h 42m into the drive.
The longest continuous stretch on this route runs about 190.8 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 80 miles or 1h 17m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 106.7 miles or 1h 42m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 47m
Traffic, exits, and arrival timing usually matter more near Fort Thompson, 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.
Day 1
Settle into the route from Rapid City, SD
This is one driving day of about 213.4 miles and 3h 35m.
Your first comfortable stop window is around 80 miles from Rapid City, 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 190.8 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 106.7 mi from Rapid City, SD · 1h 42m into the drive
Mid-route town
Meal stop
107 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 80 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 106.7 miles from Rapid City, SD, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 90 if your tank is already low. That segment runs about 190.8 miles.
Arriving in Fort Thompson, SD
The final approach into Fort Thompson, SD usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Fort Thompson, SD.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$32.41 one way
$64.83 round trip
$3.86/gal
25.4 MPG avg
75 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $35.73 | $71.46 |
| premium | $4.80 | $40.29 | $80.57 |
| diesel | $5.64 | $47.41 | $94.82 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$32
Meals
$25–$50
Total
$57–$82
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 74.7 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $22 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 64 | 0 | $22.41 | $10.24 |
| Efficient EV | 53.4 | 0 | $18.67 | $8.54 |
| EV Truck/SUV | 85.4 | 1 | $29.88 | $13.66 |
Gas CO2
75 kg
EV CO2
25 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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.
Destination
Fort Thompson, SD
Evening in Fort Thompson on Sunday
Local time
6:06 PM
CDT
Current temp
69°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
29 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
3h 35m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Rapid City, SD to Fort Thompson, SD covers 213.4 miles and takes about 3h 35m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 90, SD 47, I 190. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 106.7 miles from Rapid City, SD. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $32.41 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
This is a straightforward 3h 35m drive. You will face about 6 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: at 0.2 miles (US 16; SD 44 / Omaha Street): Navigation decision point; at 0.4 miles (I 190; US 16): Navigation decision point; at 1.7 miles (I 190): Highway fork - watch signs carefully.
The route from Rapid City, SD to Fort Thompson, SD does not surface many named destination signs beyond the main corridor.
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