Drive Time
6h 31m
Distance
374.9 mi
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$56
one way
The drive from Spearfish, SD to Tyndall, SD covers 374.9 miles and takes about 6h 31m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on North Main Street, East Jackson Boulevard, I 90 East for much of the mileage, and the overall profile is turn-heavy local drive. At current regular gas prices, budget about $55.66 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
187.5 miles from Spearfish, SD
A natural place for your longest stop of the day , about 3h 15m into the drive .
Expect a 6h 31m drive with frequent turns across 374.9 miles of local and secondary roads.
| Road | Distance | Duration |
|---|---|---|
| North Main Street | Unavailable | Refreshing |
| East Jackson Boulevard | Unavailable | Refreshing |
| I 90 East | Unavailable | Refreshing |
| Mitchell | Unavailable | Refreshing |
| South Burr Street | Unavailable | Refreshing |
| Highway 37 | Unavailable | Refreshing |
| Highway 50 | Unavailable | Refreshing |
| 303rd Street | Unavailable | Refreshing |
Per-road distance and duration are being refreshed from OSRM for this route.
Step-by-step road directions between Spearfish, SD and Tyndall, SD.
Start on North Main Street
Continue on North Main Street
Turn right onto East Jackson Boulevard
Take the ramp right toward I 90 East, US 85 South
Merge slight left
Continue straight
Continue straight
Continue straight
Take the exit slight right toward Mitchell
Keep slight right
Turn slight right onto South Burr Street
Continue on South Highway 37
Continue on SD Highway 37
Turn left onto SD Highway 50
Turn left onto 303rd Street
Continue on West 20th Avenue
Turn right onto Main Street
Turn right onto West 18th Avenue
Arrive at your destination
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
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 82 miles or 1h 25m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 187.5 miles or 3h 15m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 28m
Traffic, exits, and arrival timing usually matter more near Tyndall, SD than in the middle of the route.
Open the route before leaving Spearfish, 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 Spearfish, SD
This is one driving day of about 374.9 miles and 6h 31m.
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 187.5 mi from Spearfish, SD · 3h 15m into the drive
Mid-route town
Meal stop
187 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 82 miles helps settle the day before fatigue starts building.
The midpoint is around 187.5 miles from Spearfish, SD, which is a good place for a longer meal and fuel stop.
The final approach into Tyndall, 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 Tyndall, SD.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Regular Gas
$55.66 one way
$111.32 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $62.77 | $125.55 |
| premium | $4.65 | $68.69 | $137.38 |
| diesel | $5.30 | $78.29 | $156.57 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$56
Meals
$25–$50
Total
$81–$106
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 131.2 kg one way.
Driving Electric?
About $39 in charging · 1 stop · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 112.5 | 1 | $39.36 | $18.00 |
| Efficient EV | 93.7 | 1 | $32.80 | $15.00 |
| EV Truck/SUV | 150 | 1 | $52.49 | $23.99 |
Gas CO2
131 kg
EV CO2
44 kg (66% 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
Late night in Spearfish on Saturday
Local time
4:54 AM
MDT
Current temp
40°F
Forecast unavailable right now
Destination
Late night in Tyndall on Saturday
Local time
5:54 AM
CDT
Current temp
41°F
Forecast unavailable right now
Along the Route
40°F
Pierre, SD
187 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
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Explore more options from Spearfish, SD or browse trips ending in Tyndall, SD.
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