Fort Thompson, SD to Box Elder, SD is 203.5 miles and takes about 3h 24m via I 90 and SD Highway 47, with a fuel budget near $32 and enough daylight to finish in a day. This trip stays entirely within the Great Plains region of South Dakota, offering a straightforward drive. With almost the entire route on major highways, it’s a practical choice for getting between these two points efficiently. Plan for a single day of travel, as the duration is manageable.
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
101.8 miles from Fort Thompson, SD
A natural place for your longest stop of the day
, about 1h 46m into the drive
.
Main Roads
Road
Distance
Duration
I 90
181.2 mi
2h 49m
SD Highway 47
19.4 mi
28m
Highway 1416
0.9 mi
1m
SD 248
0.7 mi
1m
Liberty Boulevard
0.5 mi
<1m
Oak Street
0.1 mi
<1m
Front Street
<0.1 mi
<1m
BIA Route 4
<0.1 mi
<1m
Longest stretch:
I 90
— 181.2 mi, about 2h 49m
Traffic on I-90
Hour-of-day weekday pattern from 14 FHWA count stations on your route.
Peak
1 PM
~287 veh/hr typical
· worst 555
Quietest
2 AM
~22 veh/hr
Peak-to-quiet ratio
13×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 51 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 Fort Thompson, SD and Box Elder, SD.
1
Start on BIA 4
65 ft·9 sec·BIA Route 4
2
Turn sharp left onto SD 47
2.2 mi·3 min·SD Highway 47
3
Continue on SD 47
17 mi·25 min·SD Highway 47
4
Continue on SD 248
0.7 mi·1 min·SD 248
5
Take the ramp
0.2 mi·30 sec
6
Merge onto I 90
181 mi·2 hr 49 min·I 90
7
Take the exit
0.4 mi·47 sec
Toward Box Elder, Elisworth AirForce Base
8
Keep slight left at fork
92 ft·7 sec
9
Turn left onto Liberty Boulevard
0.5 mi·52 sec·Liberty Boulevard
10
Turn right onto Highway 1416
0.9 mi·1 min·Highway 1416
11
Turn left onto Oak Street
0.1 mi·31 sec·Oak Street
12
Turn right onto Front Street
94 ft·4 sec·Front Street
13
Arrive at destination
Front Street
Trip Plan
Given the 3h 24m estimated drive time, leaving in the morning allows for plenty of daylight to reach Box Elder. The 203.5-mile distance is easily covered in one day, so you have flexibility with your departure time. With a fuel cost estimated at $32, it's a budget-friendly trip. Keep an eye on your fuel gauge, as the longest stretch without services might be on I 90; plan your fuel stops accordingly to avoid any surprises before reaching Box Elder.
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 101.8 miles from Fort Thompson, SD, or about 1h 46m into the drive.
The longest continuous stretch on this route runs about 181.2 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 45 miles or 53m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 101.8 miles or 1h 46m 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 48m
Traffic, exits, and arrival timing usually matter more near Box Elder, SD than in the middle of the route.
Before You Leave
+
Open the route before leaving Fort Thompson, 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 Fort Thompson, SD
This is one driving day of about 203.5 miles and 3h 24m.
Your first comfortable stop window is around 45 miles from Fort Thompson, 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 181.2 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 9
5 decision points cluster between mile 0 and 203.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0 mi into trip|~0m in|SD 47 / SD Highway 47
Turn sharp left onto SD 47 / SD Highway 47
Sharp turn - reduce speed on approach
4
20.1 mi into trip|~30m in
Take the ramp
Navigation decision point
5
201.6 mi into trip|~3h 20m in
Take the exit toward Box Elder, Elisworth AirForce Base
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward Box Elder, Elisworth AirForce Base
4
202 mi into trip|~3h 21m in
Keep slight left at fork
Highway fork - watch signs carefully
5
203.5 mi into trip|~3h 24m in|Front Street
Turn right onto Front Street
Navigation decision point
Fuel & Cost
Regular Gas
$30.05 one way
$60.10 round trip
$3.75/gal25.4 MPG avg71 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$33.18
$66.35
premium
$4.72
$37.78
$75.57
diesel
$4.80
$38.42
$76.85
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$30
Meals
$25–$50
Total
$55–$80
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 71.2 kg one way.
Prices: EIA weekly data, 2026-07-13.
EV Charging Along Route
3 DC fast chargers
· Coverage: fair
Wall, SD - Tesla Supercharger
Wall, SD
Tesla
8 DCFC
Murdo, SD - Tesla Supercharger
Murdo, SD
Tesla
4 DCFC
Wall Drug Store-Wall Conoco Station (Wall, SD)
Wall, SD
Electrify America
4 DCFC
Tesla: 2
Electrify America: 1
Station data from NREL Alternative Fuel Stations database.
Driving Electric?
About $21 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
61.1
0
$21.37
$9.77
Efficient EV
50.9
0
$17.81
$8.14
EV Truck/SUV
81.4
1
$28.49
$13.02
Gas CO2
71 kg
EV CO2
24 kg (66% 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.
Forecast as of Jul 19, 2026
Origin
Fort Thompson, SD
Late night
in Fort Thompson on Sunday
Local time
1:41 AM
CDT
Current temp
70°F
Partly Cloudy
ESE 9 to 13 mph9% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 1:04PM MDT until July 19 at 9:00PM MDT by NWS Rapid City SD
Heat Advisory
Heat Advisory issued July 18 at 1:34PM CDT until July 19 at 9:00PM CDT by NWS Sioux Falls SD
Destination
Box Elder, SD
Late night
in Box Elder on Sunday
Local time
12:41 AM
MDT
Current temp
72°F
Slight Chance Showers And Thunderstorms
S 8 to 13 mph20% chanceLive forecast
Heat Advisory
Heat Advisory issued July 18 at 1:04PM MDT until July 19 at 9:00PM MDT by NWS Rapid City SD
Heat Advisory
Heat Advisory issued July 18 at 1:34PM CDT until July 19 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 earlier
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
2 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 24m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
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.
Badlands National Park
National Park
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 154.4
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...
25 mi from route
~62 min detour
Free
near mile 203.5
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll be on highways for 99% of this 203.5-mile trip. The bulk of your driving, a stretch of 181.2 miles, will be on I 90. Expect consistent highway cruising for the majority of the drive, with minimal time spent on surface roads. The frequent exits on I 90 mean you'll have many opportunities for services or a break.
99% highway — fuel and pacing are the main things to plan.
13 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 181.2 mi on I 90.
How Hard Is This Drive?
3/10
This is a straightforward highway drive that stays mostly on I 90 and SD Highway 47. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near SD 47 / SD Highway 47.
Driving Effort3/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 3h 24m drive. You will face about 9 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start (SD 47 / SD Highway 47): Sharp turn - reduce speed on approach; at 20.1 miles: Navigation decision point; at 201.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
The longest stretch is about 181.2 miles on I 90. The full list of main roads is in the Roads section above.
Yes — we found about 14 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
Yes, with realistic expectations. Build in a stop roughly every 2 hours, have snacks and activities ready, and check the Nearby Places tabs for kid-friendly stops along the way.
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: near the start (SD 47 / SD Highway 47): Sharp turn - reduce speed on approach; at 20.1 miles: Navigation decision point; at 201.6 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Yes — Badlands National Park and Mount Rushmore National Memorial. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 3.4 hours each way, an in-and-out day trip would put you behind the wheel for 6.8 hours — manageable with a long break at Box Elder, SD, but most travelers stay overnight.
