This 444.8-mile journey from Deadwood, South Dakota, to Watertown, South Dakota, is a substantial drive, estimated to take around 7 hours and 35 minutes of pure travel time. Primarily utilizing I-90 and supplemented by SD 79 and SD Highway 25, this route is predominantly highway driving, making it feasible as a single-day trip. With a projected fuel cost of approximately $70, it’s a manageable expense for a full day on the road. You'll traverse the Great Plains region throughout, experiencing a consistent landscape. Plan for about 2 stops along the way to break up the 7.5-hour travel.
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
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
222.4 miles from Deadwood, SD
A natural place for your longest stop of the day
, about 3h 36m into the drive
.
Main Roads
Road
Distance
Duration
I 90
232.3 mi
3h 37m
SD 79
87.6 mi
1h 26m
SD Highway 25
83.8 mi
1h 38m
US Highway 212
14.5 mi
18m
Main Street
9.4 mi
11m
9th Avenue Southwest
6.4 mi
8m
SD Highway 34
6 mi
7m
Boulder Canyon Road
1.1 mi
1m
Longest stretch:
I 90
— 232.3 mi, about 3h 37m
Turn-by-Turn Driving Directions
Step-by-step road directions between Deadwood, SD and Watertown, SD.
1
Start on Lee Street
184 ft·13 sec·Lee Street
2
Turn left onto Main Street
344 ft·16 sec·Main Street
3
Turn left onto Deadwood Street
219 ft·12 sec·Deadwood Street
4
Turn left onto US 14A; US 85
0.4 mi·32 sec·Pioneer Way
5
Continue on US 14A; US 85
9.3 mi·11 min·Main Street
6
Continue on US 14A
1.1 mi·1 min·Boulder Canyon Road
7
Continue on US 14A
1.1 mi·1 min·Lazelle Street
8
Take the exit onto SD 79
88 mi·1 hr 26 min·SD 79
9
Continue on I 90
232 mi·3 hr 37 min·I 90
10
Take the exit
0.3 mi·47 sec
Toward SD 25: Emery, Farmer
11
Turn left onto SD 25
24 mi·27 min·SD Highway 25
12
Turn right onto SD 25; SD 34
6.0 mi·7 min·SD Highway 34
13
Turn left onto SD 25
60 mi·1 hr 10 min·SD Highway 25
14
At end of road, turn right onto US 212; SD 25
3.9 mi·5 min·US Highway 212
15
Continue on US 212
1.0 mi·1 min·4th Street
16
Continue on US 212
11 mi·12 min·US Highway 212
17
Continue on US 212
6.4 mi·8 min·9th Avenue Southwest
18
Turn left onto South Broadway
0.7 mi·1 min·South Broadway
19
Arrive at destination
South Broadway
Trip Plan
To make the most of this 7-hour, 35-minute drive, consider an early morning departure from Deadwood to ensure you arrive in Watertown with ample daylight. With only 2 recommended stops, you can strategically place them to manage your time and energy. Keep an eye on your fuel gauge, especially during the longest stretch on I-90, as services can be spaced out. Given the route's 95% highway share, you'll cover ground quickly, but remember to take advantage of those planned stops for rest and stretching. A concrete tip: utilize the longer 232.3-mile stretch on I-90 to get into a rhythm, saving your planned stops for when you truly need a break or a meal.
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.
You can normally do this drive in one day.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 222.4 miles from Deadwood, SD, or about 3h 36m into the drive.
The longest continuous stretch on this route runs about 232.3 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 98 miles or 1h 39m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 222.4 miles or 3h 36m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 6h 21m
Traffic, exits, and arrival timing usually matter more near Watertown, SD than in the middle of the route.
Before You Leave
+
Open the route before leaving Deadwood, 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.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Deadwood, SD
This is one driving day of about 444.8 miles and 7h 35m.
Your first comfortable stop window is around 98 miles from Deadwood, SD.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on I 90 for about 232.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 10
5 decision points cluster between mile 0 and 422.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
0 mi into trip|~0m in|Main Street
Turn left onto Main Street
Navigation decision point
5
0.1 mi into trip|~0m in|Deadwood Street
Turn left onto Deadwood Street
Navigation decision point
4
12.1 mi into trip|~14m in|SD 79
Take the exit onto SD 79
Exit ramp - move to the correct lane early
5
332 mi into trip|~5h 19m in
Take the exit toward SD 25: Emery, Farmer
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward SD 25: Emery, Farmer
5
422.2 mi into trip|~7h 5m in|US 212; SD 25 / US Highway 212
At end of road, turn right onto US 212; SD 25 / US Highway 212
Navigation decision point
Fuel & Cost
Regular Gas
$69.54 one way
$139.08 round trip
$3.97/gal25.4 MPG avg156 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$76.35
$152.70
premium
$4.89
$85.60
$171.20
diesel
$5.61
$98.21
$196.41
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$70
Meals
$25–$50
Total
$95–$120
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 155.6 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $47 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
133.4
1
$46.70
$21.35
Efficient EV
111.2
1
$38.92
$17.79
EV Truck/SUV
177.9
2
$62.27
$28.47
Gas CO2
156 kg
EV CO2
52 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.
Forecast as of Apr 15, 2026
Origin
Deadwood, SD
Evening
in Deadwood on Saturday
Local time
7:10 PM
MDT
Current temp
71°F
Unavailable
Live forecast
Destination
Watertown, SD
Evening
in Watertown on Saturday
Local time
8:10 PM
CDT
Current temp
70°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
1 hour later
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
1 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
7h 35m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Mount Rushmore National Memorial
National Memorial
Majestic figures of George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln, surrounded by the beauty of the Black Hills of South Dakota, tell the story of the birth, growth, devel...
22 mi from route
~56 min detour
Free
near mile 30.7
The rugged beauty of the Badlands draws visitors from around the world. These striking geologic deposits contain one of the world’s richest fossil beds. Ancient horses and rhinos once roamed here. The...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a highway-focused experience for 95% of this 444.8-mile route. The majority of your time will be spent on I-90, including a significant uninterrupted stretch of 232.3 miles. While the interstate provides efficient travel, be prepared for long periods of consistent driving. The inclusion of SD 79 and SD Highway 25 offers brief diversions from the interstate, potentially introducing slightly different driving conditions before you rejoin the main highway corridors. This drive emphasizes forward momentum across the South Dakota landscape.
95% highway — fuel and pacing are the main things to plan.
19 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 232.3 mi on I 90.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 90 and SD 79. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near Main Street.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
The route itself is not hard, but at 7h 35m, endurance matters. Plan breaks every 2-3 hours. The 10 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: near the start (Main Street): Navigation decision point; at 0.1 miles (Deadwood Street): Navigation decision point; at 12.1 miles (SD 79): Exit ramp - move to the correct lane early.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Deadwood, SD to Watertown, SD, road signs begin pointing toward Farmer along the way.
Deadwood is a town in the Black Hills of South Dakota. It is rivaled only by Tombstone, Arizona as America's most storied town from the wild frontier days.
The longest stretch is about 232.3 miles on I 90. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This is a long drive, so arriving tired and in the dark compounds. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Watertown, SD before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
Mostly yes along the main roads, but rural stretches through SD can have sparse or no coverage. Before you leave, download offline Google Maps or Apple Maps for the route, and consider downloading music or podcasts instead of streaming. If you depend on data for navigation, keep a paper backup of the turn-by-turn directions.
The main spots that need attention: near the start (Main Street): Navigation decision point; at 0.1 miles (Deadwood Street): Navigation decision point; at 12.1 miles (SD 79): Exit ramp - move to the correct lane early.
Yes — Mount Rushmore National Memorial and Badlands National Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 7.6 hours each way, a round trip means 15.2 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Watertown, SD before the return drive.
