How far is Harrisburg, SD from Gregory, SD?
The driving distance from Harrisburg, SD to Gregory, SD is about 172.2 miles (277.1 km), with a travel time of about 03h 39m by car.
- The straight-line flight distance is about 138.1 miles (222.2 km).
- For a round trip, plan for roughly 07h 19m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 03h 39m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in and county seat of Bon Homme County, South Dakota, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Slight Chance Rain Showers
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Harrisburg and Gregory.
Turn-by-Turn Driving Directions
Step-by-step road directions between Harrisburg and Gregory.
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1
Start on East Willow Street
1.5 mi · 3 min · East Willow Street
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2
Turn left onto SD Highway 115
3 mi · 4 min · SD Highway 115
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3
Turn right onto 276th Street
3.6 mi · 5 min · 276th Street
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4
Take the ramp left
2259 ft · 55 sec
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5
Merge slight left
20.3 mi · 19 min
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6
Take the exit slight right
1690 ft · 43 sec
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7
Turn right onto West Cedar Street
2190 ft · 37 sec · West Cedar Street
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8
Continue on SD Highway 46
17.5 mi · 26 min · SD Highway 46
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9
Continue on East Main Street
3227 ft · 55 sec · East Main Street
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10
Continue on SD Highway 46
69.3 mi · 1 hr 32 min · SD Highway 46
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11
Continue on East US Highway 18
21 mi · 25 min · East US Highway 18
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12
Keep slight right
33.7 mi · 42 min
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13
Turn right onto South Main Street
2206 ft · 2 min · South Main Street
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14
Turn right onto East 6th Street
34 m · 5 sec · East 6th Street
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15
Arrive at your destination
0 m · 1 sec · East 6th Street
Car Route Details
A richer read on the saved driving route between Harrisburg and Gregory.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
SD Highway 46
Continue on SD Highway 46
69.3 mi · 01h 32m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Partly Sunny then Slight Chance Rain Showers leaving Harrisburg and Mostly Sunny near Gregory.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Harrisburg to Gregory?
The road trip is about 172.2 miles (277.1 km) and usually takes 03h 39m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Tyndall is a useful midpoint, sitting about 85.9 miles from Harrisburg and 86.2 miles from Gregory.
How much longer is the road route than the straight-line distance?
The direct path is about 138.1 miles (222.2 km), while the road route adds roughly 34.1 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 9:40 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $22.93 one way or $45.86 round trip. Estimated CO2 is about 54 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Slight Chance Rain Showers around Harrisburg and Mostly Sunny near Gregory.
Flight Path Map
This map shows the direct air route between Harrisburg and Gregory. Straight-line distance: 138.04 mi (222.16 km).
#1 Harrisburg
City in South Dakota, United States of America
| Population | 7,126 |
| Coordinates | 43.4313700, -96.6972700 |
| Altitude | 435 |
| Country | United States |
#2 Gregory
City in Gregory County, South Dakota, United States
| Population | 1,250 |
| Coordinates | 43.2322200, -99.4303800 |
| Altitude | 661 |
| Country | United States |
End: Gregory (-99.43038, 43.23222)
Estimated Travel Time
Distance: 277 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 44m |
| 40 mph (64.37 km/h) | 04h 18m |
| 50 mph (80.47 km/h) | 03h 26m |
| 60 mph (96.56 km/h) | 02h 52m |
| 70 mph (112.65 km/h) | 02h 27m |
| 80 mph (129 km/h) | 02h 08m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $22.93 | $45.86 |
| Mid-grade | $4.25 | $25.86 | $51.72 |
| Premium | $4.65 | $28.30 | $56.59 |
| Diesel | $5.30 | $32.25 | $64.50 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in South Dakota · Apr 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.