Origin
Fort Thompson, SD
Evening in Fort Thompson on Sunday
Local time
6:06 PM
CDT
Current temp
69°F
Unavailable
Live forecast
Trip from Fort Thompson, SD to Harrisburg, SD
Drive Time
3h 12m
Distance
177.4 mi
285 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$27
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
3h 1m
★
6 AM
3h 13m
8 AM
3h 36m
10 AM
3h 21m
12 PM
3h 19m
3 PM
3h 22m
5 PM
3h 35m
8 PM
3h 6m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Fort Thompson, SD
Esteban Carriazo
Harrisburg, SD
Ken Jacobsen
Trip Overview
Spanning 177.4 miles across the Great Plains, this drive from Fort Thompson to Harrisburg is a straightforward journey that typically takes about 3 hours and 12 minutes. Because the trip is well within a single day's driving range, you can easily complete it in one day without needing an overnight stay. You will spend the vast majority of your time on major routes, specifically I-90, SD Highway 50, and I-29. Budgeting around $27 for fuel should cover your needs for the trip. Since both your start and end points are located within the Great Plains, you can expect consistent terrain throughout the duration of your travel. It is a practical, efficient route for those looking to reach their destination reliably.
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
88.7 miles from Fort Thompson, SD
A natural place for your longest stop of the day , about 1h 41m into the drive .
Drive Character
This is a highway-focused drive, with 94% of your journey spent on high-speed thoroughfares. You will face a significant stretch of 129.9 miles on I-90, which provides a long, uninterrupted period behind the wheel. The remainder of the route transitions onto SD Highway 50 and I-29, shifting the pace as you move toward Harrisburg. While the interstate sections offer a consistent, fast-moving experience, the mix of highways ensures you cover the 177.4-mile distance quickly. Expect a steady, predictable road profile that prioritizes efficiency over technical driving maneuvers.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 16 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 129.9 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 90 and SD Highway 50. There are only a few real navigation decisions along the way. The trickiest moment comes around 5.8 miles in near SD 50 / SD Highway 50.
Route Complexity
3/10
Easy - simple navigation with a manageable amount of wheel time
This is a straightforward 3h 12m 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 5.8 miles (SD 50 / SD Highway 50): Navigation decision point; at 25.6 miles (East Mott Avenue): Navigation decision point; at 25.6 miles (North Sanborn Street): Navigation decision point.
Critical Maneuvers
5 of 11 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
5.8 mi into trip
|
~8m in
|
SD 50 / SD Highway 50
Turn right onto SD 50 / SD Highway 50
Navigation decision point
4
25.6 mi into trip
|
~38m in
|
East Mott Avenue
Turn left onto East Mott Avenue
Navigation decision point
5
25.6 mi into trip
|
~39m in
|
North Sanborn Street
Turn right onto North Sanborn Street
Navigation decision point
4
25.9 mi into trip
|
~40m in
|
I 90 Business; SD 50 / East King Street
Turn left onto I 90 Business; SD 50 / East King Street
Navigation decision point
5
159.9 mi into trip
|
~2h 49m in
|
I 29
Merge onto I 29
Merge point - match speed before joining. Lane positioning matters here
Use the none lane.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 90 | 129.9 mi | 2h 2m |
| SD Highway 50 | 18.8 mi | 28m |
| I 29 | 12.2 mi | 13m |
| SD Highway 34 | 4.6 mi | 6m |
| 273rd Street | 3.5 mi | 6m |
| East King Street | 3.2 mi | 5m |
| West Willow Street | 1.6 mi | 2m |
| SD Highway 249 | 1.1 mi | 1m |
Longest stretch:
I 90
— 129.9 mi, about 2h 2m
Turn-by-Turn Driving Directions
Step-by-step road directions between Fort Thompson, SD and Harrisburg, SD.
1
Start on BIA 4
65 ft
·
1 sec
·
BIA Route 4
2
Turn right onto SD 249
1.1 mi
·
1 min
·
SD Highway 249
3
Turn straight onto SD 34
4.6 mi
·
6 min
·
SD Highway 34
4
Turn right onto SD 50
19 mi
·
28 min
·
SD Highway 50
5
Continue on SD 50
1.0 mi
·
2 min
·
North Main Street
6
Turn left onto East Mott Avenue
331 ft
·
16 sec
·
East Mott Avenue
7
Turn right onto North Sanborn Street
0.3 mi
·
1 min
·
North Sanborn Street
8
Turn left onto I 90 Business; SD 50
3.2 mi
·
5 min
·
East King Street
9
Take the ramp onto I 90 Business; SD 50
0.4 mi
·
45 sec
·
I 90 Business; SD 50
Toward I 90 East
10
Merge onto I 90; SD 50
130 mi
·
2 hr 2 min
·
I 90; SD 50
11
Take the exit
0.4 mi
·
57 sec
12
Merge onto I 29
12 mi
·
13 min
·
I 29
Use the none lane.
13
Take the exit
0.3 mi
·
41 sec
14
Turn left onto CR 110
3.5 mi
·
6 min
·
273rd Street
15
Continue on CR 110
1.6 mi
·
2 min
·
West Willow Street
16
Arrive at destination
CR 110
Trip Plan
To keep your trip comfortable, plan for at least one stop during the 3-hour and 12-minute drive to break up the monotony of the long interstate stretches. Since you are spending nearly the entire journey on major highways, check your fuel levels before merging onto I-90, as this is where you will spend the bulk of your time. Leaving early in the morning allows you to avoid potential traffic fluctuations near your destination in Harrisburg. The flexibility of this single-day route means you can easily adjust your pace to suit your schedule. Given the 129.9-mile longest stretch, prioritize checking your tire pressure and vehicle fluids before departing to ensure a smooth transition across the Great Plains.
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 88.7 miles from Fort Thompson, SD, or about 1h 41m into the drive.
The longest continuous stretch on this route runs about 129.9 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 33m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 88.7 miles or 1h 41m 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 35m
Traffic, exits, and arrival timing usually matter more near Harrisburg, 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 177.4 miles and 3h 12m.
Your first comfortable stop window is around 80 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 129.9 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 88.7 mi from Fort Thompson, SD · 1h 41m into the drive
Mid-route town
Meal stop
89 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 88.7 miles from Fort Thompson, 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 129.9 miles.
Arriving in Harrisburg, SD
The final approach into Harrisburg, 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 Harrisburg, 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
$26.95 one way
$53.89 round trip
$3.86/gal
25.4 MPG avg
62 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $29.70 | $59.41 |
| premium | $4.80 | $33.49 | $66.98 |
| diesel | $5.64 | $39.41 | $78.82 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$27
Meals
$25–$50
Total
$52–$77
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 62.1 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $19 in charging · 0 stops · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 53.2 | 0 | $18.63 | $8.52 |
| Efficient EV | 44.4 | 0 | $15.52 | $7.10 |
| EV Truck/SUV | 71 | 0 | $24.84 | $11.35 |
Gas CO2
62 kg
EV CO2
21 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.
Destination
Harrisburg, SD
Evening in Harrisburg on Sunday
Local time
6:06 PM
CDT
Current temp
40°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
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
29 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
3h 12m 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 Fort Thompson, SD to Harrisburg, SD covers 177.4 miles and takes about 3h 12m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 90, SD Highway 50, I 29. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 88.7 miles from Fort Thompson, SD. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $26.95 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 12m drive. You will face about 11 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: at 5.8 miles (SD 50 / SD Highway 50): Navigation decision point; at 25.6 miles (East Mott Avenue): Navigation decision point; at 25.6 miles (North Sanborn Street): Navigation decision point.
The route from Fort Thompson, SD to Harrisburg, SD does not surface many named destination signs beyond the main corridor.
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