This 399.1-mile drive from Tea, South Dakota, to Spearfish, South Dakota, is designed for a single day, taking approximately 6 hours and 27 minutes. You'll spend virtually all of your time on the highway, with a 99% highway share, making it a focused journey across the Great Plains. The estimated fuel cost for this trip is around $61. This route is best suited for travelers looking to cover ground efficiently, with the longest stretch covering a significant 384.2 miles on I-90. It’s a straightforward trip with minimal detours, perfect for getting from point A to point B without much fuss.
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
199.5 miles from Tea, SD
A natural place for your longest stop of the day
, about 3h 15m into the drive
.
Main Roads
Road
Distance
Duration
I 90
384.2 mi
6h 6m
I 29
10.3 mi
11m
East Gateway Boulevard
1.4 mi
2m
North Heritage Parkway
1 mi
1m
East Jackson Boulevard
0.6 mi
1m
East 1st Street
0.5 mi
<1m
North Main Street
<0.1 mi
<1m
Longest stretch:
I 90
— 384.2 mi, about 6h 6m
Turn-by-Turn Driving Directions
Step-by-step road directions between Tea, SD and Spearfish, SD.
1
Start on CR 106
0.5 mi·56 sec·East 1st Street
2
Turn left onto CR 111
1.0 mi·1 min·North Heritage Parkway
3
Turn right onto CR 106
1.4 mi·2 min·East Gateway Boulevard
4
Take the ramp
0.5 mi·1 min
5
Merge onto I 29
10 mi·11 min·I 29
6
Take the exit
0.2 mi·29 sec
Toward I 90 West: Rapid City
7
Merge onto I 90
384 mi·6 hr 6 min·I 90
8
Take the exit
0.3 mi·43 sec
Toward Jackson Boulevard, Black Hills State University
9
Turn left onto East Jackson Boulevard
0.6 mi·1 min·East Jackson Boulevard
10
Turn left onto I 90 Business
149 ft·14 sec·North Main Street
11
Arrive at destination
I 90 Business
Trip Plan
Given the 6-hour and 27-minute duration, this route is comfortably manageable as a single-day trip. Aim to depart in the morning to allow ample time for the 399.1-mile journey and any brief stops you might need. With a 99% highway share, your longest potential stretch without a major exit is 384.2 miles on I-90, so plan your fuel and rest stops accordingly, perhaps around the halfway mark or when you feel the need. Keep an eye on your fuel gauge, especially during the longer segments, to ensure a smooth arrival in Spearfish.
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 199.5 miles from Tea, SD, or about 3h 15m into the drive.
The longest continuous stretch on this route runs about 384.2 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 88 miles or 1h 29m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 199.5 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 Spearfish, SD than in the middle of the route.
Before You Leave
+
Open the route before leaving Tea, 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 Tea, SD
This is one driving day of about 399.1 miles and 6h 27m.
Your first comfortable stop window is around 88 miles from Tea, 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 384.2 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 7
5 decision points cluster between mile 0.5 and 398.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0.5 mi into trip|~0m in|CR 111 / North Heritage Parkway
Turn left onto CR 111 / North Heritage Parkway
Navigation decision point
4
1.5 mi into trip|~2m in|CR 106 / East Gateway Boulevard
Turn right onto CR 106 / East Gateway Boulevard
Navigation decision point
4
13.7 mi into trip|~18m in
Take the exit toward I 90 West: Rapid City
Exit ramp - move to the correct lane early
Toward I 90 West: Rapid City
5
398.1 mi into trip|~6h 24m in
Take the exit toward Jackson Boulevard, Black Hills State University
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward Jackson Boulevard, Black Hills State Uni...
4
398.4 mi into trip|~6h 25m in|East Jackson Boulevard
Turn left onto East Jackson Boulevard
Navigation decision point
Fuel & Cost
Regular Gas
$62.39 one way
$124.79 round trip
$3.97/gal25.4 MPG avg140 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.36
$68.51
$137.01
premium
$4.89
$76.80
$153.61
diesel
$5.61
$88.12
$176.23
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: 139.6 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $42 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
119.7
1
$41.91
$19.16
Efficient EV
99.8
1
$34.92
$15.96
EV Truck/SUV
159.6
1
$55.87
$25.54
Gas CO2
140 kg
EV CO2
47 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.
Forecast as of Apr 15, 2026
Origin
Tea, SD
Evening
in Tea on Saturday
Local time
8:07 PM
CDT
Current temp
48°F
Unavailable
Live forecast
Destination
Spearfish, SD
Evening
in Spearfish on Saturday
Local time
7:07 PM
MDT
Current temp
73°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 earlier
The destination clock does not match departure time, so double-check hotel check-in windows and late arrival plans.
Temperature spread
25 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 27m 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...
20 mi from route
~50 min detour
Free
near mile 357.8
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...
25 mi from route
~62 min detour
$30
near mile 302.8
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 almost the entire 399.1 miles, with I-90 serving as your main artery for the vast majority of the journey. The drive is characterized by its efficiency, allowing you to maintain consistent speeds for long periods. The longest uninterrupted stretch is a substantial 384.2 miles on I-90, meaning you'll have plenty of opportunity to settle in. While primarily interstate, this route efficiently connects you across the Great Plains region, offering a direct and uncomplicated path.
99% highway — fuel and pacing are the main things to plan.
11 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 384.2 mi on I 90.
How Hard Is This Drive?
3/10
This is a straightforward highway drive that stays mostly on I 90 and I 29. There are only a few real navigation decisions along the way. The trickiest moment comes around 0.5 miles in near CR 111 / North Heritage Parkway.
Driving Effort3/10
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 6h 27m, endurance matters. Plan breaks every 2-3 hours. The 7 decision points are all manageable with basic attention.
Where does it get tricky?
The main spots that need attention: at 0.5 miles (CR 111 / North Heritage Parkway): Navigation decision point; at 1.5 miles (CR 106 / East Gateway Boulevard): Navigation decision point; at 13.7 miles: Exit ramp - move to the correct lane early.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 6h 27m. Total distance: 399.1 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
The longest stretch is about 384.2 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 Spearfish, 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 1 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: at 0.5 miles (CR 111 / North Heritage Parkway): Navigation decision point; at 1.5 miles (CR 106 / East Gateway Boulevard): Navigation decision point; at 13.7 miles: 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 6.5 hours each way, a round trip means 12.9 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Spearfish, SD before the return drive.
