Origin
Watertown, SD
Evening in Watertown on Sunday
Local time
6:13 PM
CDT
Current temp
36°F
Unavailable
Live forecast
Trip from Watertown, SD to Rapid City, SD
Drive Time
6h 56m
Distance
407.1 mi
655 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$62
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
6h 45m
★
6 AM
6h 57m
8 AM
7h 20m
10 AM
7h 5m
12 PM
7h 3m
3 PM
7h 6m
5 PM
7h 19m
8 PM
6h 50m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Watertown, SD
David Kanigan
Rapid City, SD
Mike Lensing
Trip Overview
The drive from Watertown, SD to Rapid City, SD covers 407.1 miles and takes about 6h 56m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on I 90, SD Highway 25, US Highway 212 for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 292.2 miles on I 90. At current regular gas prices, budget about $61.83 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
203.6 miles from Watertown, SD
A natural place for your longest stop of the day , about 3h 41m into the drive .
Drive Character
This is a 6h 56m highway drive covering 407.1 miles, with most of the trip on I 90 and SD Highway 25. The longest continuous stretch is about 292.2 miles on I 90.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 15 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
I 90 is the longest continuous segment at about 292.2 miles.
Elevation Profile
Gently rolling terrain
3,243 ft
1,355 ft
Total Climb
2,124 ft
Total Descent
618 ft
Highest Point
3,243 ft
~363.1 mi in
Elevation Range
1,888 ft
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 90 and SD Highway 25. There are only a few real navigation decisions along the way. The trickiest moment comes around 22.6 miles in near SD 25 / SD Highway 25.
Route Complexity
4/10
Easy - simple navigation with a manageable amount of wheel time
The route itself is not hard, but at 6h 56m, endurance matters. Plan breaks every 2-3 hours. The 9 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 22.6 miles (SD 25 / SD Highway 25): Navigation decision point; at 88.7 miles (SD 25 / SD Highway 25): Navigation decision point; at 404.8 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 9 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
22.6 mi into trip
|
~30m in
|
SD 25 / SD Highway 25
Turn left onto SD 25 / SD Highway 25
Navigation decision point
4
88.7 mi into trip
|
~1h 47m in
|
SD 25 / SD Highway 25
Turn left onto SD 25 / SD Highway 25
Navigation decision point
5
404.8 mi into trip
|
~6h 52m in
Take the exit toward I 190, US 16: Downtown, Black Hawk National Forest, Mount Rushmore
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward I 190, US 16: Downtown, Black Hawk Natio...
4
406.7 mi into trip
|
~6h 55m in
|
US 16; SD 44 / Omaha Street
Turn left onto US 16; SD 44 / Omaha Street
Lane positioning matters here
Use the right lane.
7
406.9 mi into trip
|
~6h 56m in
|
US 16 / Mount Rushmore Road
Turn right onto US 16 / Mount Rushmore Road
Lane positioning matters here
Use the right lane.
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 90 | 292.2 mi | 4h 36m |
| SD Highway 25 | 83.6 mi | 1h 38m |
| US Highway 212 | 14.5 mi | 18m |
| 9th Avenue Southwest | 6.4 mi | 8m |
| SD Highway 34 | 6 mi | 7m |
| I 190 | 1.4 mi | 1m |
| 4th Street | 1 mi | 1m |
| South Broadway | 0.7 mi | 1m |
Longest stretch:
I 90
— 292.2 mi, about 4h 36m
Turn-by-Turn Driving Directions
Step-by-step road directions between Watertown, SD and Rapid City, SD.
1
Start on South Broadway
0.7 mi
·
1 min
·
South Broadway
2
Turn right onto US 212
6.4 mi
·
8 min
·
9th Avenue Southwest
3
Continue on US 212
11 mi
·
12 min
·
US Highway 212
4
Continue on US 212
1.0 mi
·
1 min
·
4th Street
5
Continue on US 212
3.9 mi
·
5 min
·
US Highway 212
6
Turn left onto SD 25
60 mi
·
1 hr 10 min
·
SD Highway 25
7
Turn right onto SD 25; SD 34
6.0 mi
·
7 min
·
SD Highway 34
8
Turn left onto SD 25
24 mi
·
27 min
·
SD Highway 25
9
Take the ramp
0.3 mi
·
43 sec
10
Merge onto I 90
292 mi
·
4 hr 36 min
·
I 90
11
Take the exit
0.4 mi
·
1 min
Toward I 190, US 16: Downtown, Black Hawk National Forest, Mount Rushmore
12
Continue on I 190
1.4 mi
·
1 min
·
I 190
13
Turn left onto US 16; SD 44
0.2 mi
·
39 sec
·
Omaha Street
Use the right lane.
14
Turn right onto US 16
0.2 mi
·
45 sec
·
Mount Rushmore Road
Use the right lane.
15
Arrive at destination
US 16
Trip Plan
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 1 meaningful break for fuel, food, and rest.
The halfway point lands around 203.6 miles from Watertown, SD, or about 3h 41m into the drive.
The longest continuous stretch on this route runs about 292.2 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 90 miles or 1h 49m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 203.6 miles or 3h 41m 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 57m
Traffic, exits, and arrival timing usually matter more near Rapid City, SD than in the middle of the route.
Before You Leave
+
Open the route before leaving Watertown, 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 Watertown, SD
This is one driving day of about 407.1 miles and 6h 56m.
Your first comfortable stop window is around 90 miles from Watertown, SD.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 90 for about 292.2 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 203.6 mi from Watertown, SD · 3h 41m into the drive
Mid-route town
Meal stop
204 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.
Pacing Suggestions
Fuel and coffee
A short stop after about 90 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 203.6 miles from Watertown, SD, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 90 if your tank is already low. That segment runs about 292.2 miles.
Arriving in Rapid City, SD
The final approach into Rapid City, 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 Rapid City, SD.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$61.83 one way
$123.67 round trip
$3.86/gal
25.4 MPG avg
142 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $68.17 | $136.33 |
| premium | $4.80 | $76.85 | $153.70 |
| diesel | $5.64 | $90.44 | $180.89 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$62
Meals
$25–$50
Total
$87–$112
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 142.4 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $43 in charging · 1 stop · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 122.1 | 1 | $42.75 | $19.54 |
| Efficient EV | 101.8 | 1 | $35.62 | $16.28 |
| EV Truck/SUV | 162.8 | 2 | $56.99 | $26.05 |
Gas CO2
142 kg
EV CO2
48 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.
Destination
Rapid City, SD
Evening in Rapid City on Sunday
Local time
5:13 PM
MDT
Current temp
40°F
Unavailable
Live forecast
Along the Route
43°F
Gregory, SD
204 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
1 hour earlier
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
4 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
6h 56m 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.
Frequently Asked Questions
The drive from Watertown, SD to Rapid City, SD covers 407.1 miles and takes about 6h 56m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 90, SD Highway 25, US Highway 212. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 203.6 miles from Watertown, SD. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $61.83 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
The route itself is not hard, but at 6h 56m, endurance matters. Plan breaks every 2-3 hours. The 9 decision points are all manageable with basic attention.
The main spots that need attention: at 22.6 miles (SD 25 / SD Highway 25): Navigation decision point; at 88.7 miles (SD 25 / SD Highway 25): Navigation decision point; at 404.8 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
The route from Watertown, SD to Rapid City, SD does not surface many named destination signs beyond the main corridor.
Gently rolling terrain. The route ranges from 1,355 ft to 3,243 ft elevation with about 2,124 ft of total climbing.
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