Drive Time
4h 24m
Distance
285.7 mi
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$42
one way
The drive from Gregory, SD to Spearfish, SD covers 285.7 miles and takes about 4h 24m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Park Avenue, Highway 18, 307th Avenue for much of the mileage, and the overall profile is turn-heavy local drive. At current regular gas prices, budget about $42.42 one way before food or hotel costs.
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
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
142.9 miles from Gregory, SD
A natural place for your longest stop of the day , about 2h 12m into the drive .
Expect a 4h 24m drive with frequent turns across 285.7 miles of local and secondary roads.
| Road | Distance | Duration |
|---|---|---|
| Park Avenue | Unavailable | Refreshing |
| Highway 18 | Unavailable | Refreshing |
| 307th Avenue | Unavailable | Refreshing |
| Jackson Boulevard | Unavailable | Refreshing |
| East Jackson Boulevard | Unavailable | Refreshing |
| North Main Street | Unavailable | Refreshing |
Per-road distance and duration are being refreshed from OSRM for this route.
Step-by-step road directions between Gregory, SD and Spearfish, SD.
Start on East 6th Street
At the end of the road, turn left onto Park Avenue
Turn right onto US Highway 18
Turn right onto 307th Avenue
Take the ramp left
Merge slight left
Take the exit slight right toward Jackson Boulevard, Black Hills State University
Turn left onto East Jackson Boulevard
Turn left onto North Main Street
Arrive at your destination
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.
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 13m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 142.9 miles or 2h 12m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 3h 36m
Traffic, exits, and arrival timing usually matter more near Spearfish, SD than in the middle of the route.
Open the route before leaving Gregory, 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 Gregory, SD
This is one driving day of about 285.7 miles and 4h 24m.
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 142.9 mi from Gregory, SD · 2h 12m into the drive
Mid-route town
Meal stop
143 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.
A short stop after about 80 miles helps settle the day before fatigue starts building.
The midpoint is around 142.9 miles from Gregory, SD, which is a good place for a longer meal and fuel stop.
The final approach into Spearfish, 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 Spearfish, SD.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Regular Gas
$42.42 one way
$84.83 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $47.84 | $95.68 |
| premium | $4.65 | $52.35 | $104.70 |
| diesel | $5.30 | $59.66 | $119.32 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$42
Meals
$25–$50
Total
$67–$92
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 100 kg one way.
Driving Electric?
About $30 in charging · 1 stop · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 85.7 | 1 | $30.00 | $13.71 |
| Efficient EV | 71.4 | 0 | $25.00 | $11.43 |
| EV Truck/SUV | 114.3 | 1 | $40.00 | $18.28 |
Gas CO2
100 kg
EV CO2
33 kg (67% 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. If you're planning ahead, check the forecast closer to your travel date.
Origin
Morning in Gregory on Saturday
Local time
6:30 AM
CDT
Current temp
43°F
Forecast unavailable right now
Destination
Late night in Spearfish on Saturday
Local time
5:30 AM
MDT
Current temp
40°F
Forecast unavailable right now
Along the Route
40°F
Pierre, SD
143 mi in
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
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
An early start around 7-8 AM gets you there with plenty of daylight left.
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