How far is Spearfish, SD from Lennox, SD?
The driving distance from Spearfish, SD to Lennox, SD is about 396.9 miles (638.7 km), with a travel time of about 06h 37m by car.
- The straight-line flight distance is about 355.4 miles (572 km).
- For a round trip, plan for roughly 13h 14m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
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 06h 37m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
Census-designated place in Lyman County, South Dakota, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Clear
Sunny
Driving Route Map
The map below follows the saved road route between Spearfish and Lennox.
Turn-by-Turn Driving Directions
Step-by-step road directions between Spearfish and Lennox.
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1
Start on North Main Street
26 m · 30 sec · North Main Street
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2
Continue on North Main Street
51 m · 10 sec · North Main Street
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3
Turn right onto East Jackson Boulevard
2777 ft · 2 min · East Jackson Boulevard
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4
Take the ramp right toward I 90 East, US 85 South
1555 ft · 38 sec
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5
Merge slight left
14.2 mi · 14 min
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6
Continue straight
7.6 mi · 8 min
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7
Continue straight
23.6 mi · 24 min
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8
Continue straight
329.4 mi · 5 hr 11 min
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9
Take the exit slight right
1645 ft · 40 sec
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10
Keep slight right
75 m · 6 sec
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11
Turn straight onto 463rd Avenue
4.4 mi · 8 min · 463rd Avenue
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12
Turn left onto 265th Street
3 mi · 5 min · 265th Street
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13
Turn right onto 466th Avenue
3 mi · 5 min · 466th Avenue
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14
Continue on South SD Highway 17
9.6 mi · 17 min · South SD Highway 17
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15
Continue on North Pine Street
855 ft · 19 sec · North Pine Street
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16
Turn right onto East Boynton Avenue
1576 ft · 48 sec · East Boynton Avenue
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17
Turn left onto North Main Street
1925 ft · 55 sec · North Main Street
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18
Turn right onto West 2nd Avenue
21 m · 3 sec · West 2nd Avenue
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19
Arrive at your destination
0 m · 1 sec · West 2nd Avenue
Car Route Details
A richer read on the saved driving route between Spearfish and Lennox.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 90 East
Continue straight
329 mi · 05h 11m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Clear leaving Spearfish and Sunny near Lennox.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Spearfish to Lennox?
The road trip is about 396.9 miles (638.7 km) and usually takes 06h 37m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Vivian is a useful midpoint, sitting about 198 miles from Spearfish and 198.8 miles from Lennox.
How much longer is the road route than the straight-line distance?
The direct path is about 355.4 miles (572 km), while the road route adds roughly 41.5 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 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $52.83 one way or $105.66 round trip. Estimated CO2 is about 124.5 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Spearfish and Lennox, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Mostly Clear around Spearfish and Sunny near Lennox.
Flight Path Map
This map shows the direct air route between Spearfish and Lennox. Straight-line distance: 355.41 mi (571.97 km).
#1 Spearfish
City in Lawrence County, South Dakota, United States
| Population | 11,900 |
| Coordinates | 44.4908200, -103.8593700 |
| Altitude | 1112 |
| Country | United States |
#2 Lennox
City in South Dakota, United States of America
| Population | 2,500 |
| Coordinates | 43.3541500, -96.8920000 |
| Altitude | 410 |
| Country | United States |
End: Lennox (-96.892, 43.35415)
Estimated Travel Time
Distance: 639 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 13m |
| 40 mph (64.37 km/h) | 09h 55m |
| 50 mph (80.47 km/h) | 07h 56m |
| 60 mph (96.56 km/h) | 06h 36m |
| 70 mph (112.65 km/h) | 05h 40m |
| 80 mph (129 km/h) | 04h 57m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $52.83 | $105.66 |
| Mid-grade | $4.25 | $59.58 | $119.17 |
| Premium | $4.65 | $65.20 | $130.41 |
| Diesel | $5.30 | $74.31 | $148.62 |
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.