Crossing the expanse of South Dakota, this 376.4-mile journey takes you from Spearfish to Freeman in approximately 6 hours and 7 minutes. Since the entire route stays within the Great Plains, you can expect a consistent regional atmosphere throughout your travel. With a total fuel cost of about $57, it is a straightforward trek that works well as a single-day commitment. While the drive is manageable for one day, you should prepare for a significant amount of time behind the wheel. Because you are traveling across the state, planning for this trip requires a clear understanding of the distance involved to ensure you reach your destination comfortably before evening.
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
188.2 miles from Spearfish, SD
A natural place for your longest stop of the day
, about 3h 2m into the drive
.
Main Roads
Road
Distance
Duration
I 90
351.4 mi
5h 34m
US Highway 81
22.6 mi
25m
East North County Road
0.9 mi
2m
East Jackson Boulevard
0.5 mi
1m
North Main Street
0.4 mi
1m
East 3rd Street
<0.1 mi
<1m
Longest stretch:
I 90
— 351.4 mi, about 5h 34m
Traffic on I-90
Hour-of-day weekday pattern from 45 FHWA count stations on your route.
Peak
4 PM
~594 veh/hr typical
· worst 852
Quietest
2 AM
~26 veh/hr
Peak-to-quiet ratio
22.8×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Spearfish, SD and Freeman, SD.
1
Start on I 90 Business
85 ft·30 sec·North Main Street
2
Continue on I 90 Business
166 ft·9 sec·North Main Street
3
Turn right onto East Jackson Boulevard
0.5 mi·1 min·East Jackson Boulevard
4
Take the ramp
0.3 mi·37 sec
Toward I 90 East, US 85 South
5
Merge onto I 90; US 14; US 85
14 mi·14 min·I 90; US 14; US 85
6
Continue on I 90; US 14; SD 34
7.6 mi·7 min·I 90; US 14; SD 34
7
Continue on I 90; US 14; SD 79
24 mi·24 min·I 90; US 14; SD 79
8
Continue on I 90; US 14; US 16 Truck; SD 79
306 mi·4 hr 48 min·I 90; US 14; US 16 Truck; SD 79
9
Take the exit
0.4 mi·49 sec
Toward US 81: Salem, Yankton
10
Turn right onto US 81
23 mi·25 min·US Highway 81
11
Turn right onto East North County Road
0.9 mi·2 min·East North County Road
12
Turn left onto North Main Street
0.3 mi·54 sec·North Main Street
13
Turn left onto East 3rd Street
28 ft·1 sec·East 3rd Street
14
Arrive at destination
East 3rd Street
Trip Plan
Given the 6-hour duration, try to depart early in the morning to maximize daylight and avoid fatigue. You only have one planned stop, so use that time effectively to refuel and stretch your legs, as the long stretches of interstate can become monotonous. Keep in mind that the $57 fuel estimate is a baseline, so monitor your gauge throughout the 376.4 miles to avoid running low in more remote segments. Since the route relies so heavily on I-90, keep an eye on traffic reports for that specific corridor to ensure your timeline remains accurate. This trip offers enough flexibility that you can easily adjust your pace, but staying disciplined with your single stop will help you arrive in Freeman on schedule.
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 188.2 miles from Spearfish, SD, or about 3h 2m into the drive.
The longest continuous stretch on this route runs about 351.4 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 83 miles or 1h 23m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 188.2 miles or 3h 2m 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 3m
Traffic, exits, and arrival timing usually matter more near Freeman, SD than in the middle of the route.
Before You Leave
+
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 376.4 miles and 6h 7m.
Your first comfortable stop window is around 83 miles from Spearfish, 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 351.4 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 9
5 decision points cluster between mile 0 and 376.1 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
4
0 mi into trip|~0m in|East Jackson Boulevard
Turn right onto East Jackson Boulevard
Navigation decision point
5
0.6 mi into trip|~2m in
Take the ramp toward I 90 East, US 85 South
Multiple destination signs - pick the right one
Toward I 90 East, US 85 South
5
352.2 mi into trip|~5h 37m in
Take the exit toward US 81: Salem, Yankton
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward US 81: Salem, Yankton
4
375.2 mi into trip|~6h 4m in|East North County Road
Turn right onto East North County Road
Navigation decision point
4
376.1 mi into trip|~6h 6m in|North Main Street
Turn left onto North Main Street
Navigation decision point
Fuel & Cost
Regular Gas
$62.58 one way
$125.16 round trip
$4.22/gal25.4 MPG avg132 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.60
$68.17
$136.33
premium
$5.18
$76.81
$153.61
diesel
$5.35
$79.28
$158.56
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$63
Meals
$25–$50
Total
$88–$113
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 131.7 kg one way.
Prices: EIA weekly data, 2026-06-01.
Driving Electric?
About $40 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
112.9
1
$39.52
$18.07
Efficient EV
94.1
1
$32.94
$15.06
EV Truck/SUV
150.6
1
$52.70
$24.09
Gas CO2
132 kg
EV CO2
44 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 Jun 1, 2026
Origin
Spearfish, SD
Afternoon
in Spearfish on Wednesday
Local time
1:08 PM
MDT
Current temp
47°F
Mostly Clear
SW 2 mph1% chanceLive forecast
Flood Warning
Flood Warning issued May 31 at 10:28PM CDT until June 1 at 9:45AM CDT by NWS Aberdeen SD
Destination
Freeman, SD
Afternoon
in Freeman on Wednesday
Local time
2:08 PM
CDT
Current temp
58°F
Mostly Clear
SSW 5 to 10 mph6% chanceLive forecast
Flood Warning
Flood Warning issued May 31 at 10:28PM CDT until June 1 at 9:45AM CDT by NWS Aberdeen SD
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
11 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 7m 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...
21 mi from route
~53 min detour
Free
near mile 38.9
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...
24 mi from route
~61 min detour
$30
near mile 103.8
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This trip is heavily highway-focused, with 99% of your travel occurring on major thoroughfares. You will spend the vast majority of your time on I-90, which accounts for a massive 351.4-mile stretch of the journey. The experience is defined by the efficiency of these high-speed roads, transitioning from the western plains toward the eastern side of the state. Because you are primarily utilizing I-90, US Highway 81, and East North County Road, the pace remains steady and consistent. Expect a predictable driving environment where the road layout prioritizes speed and directness over technical maneuvers.
99% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 351.4 mi on I 90.
How Hard Is This Drive?
3/10
This is a straightforward highway drive that stays mostly on I 90 and US Highway 81. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near East Jackson Boulevard.
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 7m, 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: near the start (East Jackson Boulevard): Navigation decision point; at 0.6 miles: Multiple destination signs - pick the right one; at 352.2 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
Elevation Profile
Gently rolling terrain
3,721 ft1,254 ft
Total Climb
338 ft
Total Descent
2,467 ft
Highest Point
3,721 ft
~26.9 mi in
Elevation Range
2,467 ft
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 Spearfish, SD to Freeman, SD, road signs begin pointing toward Yankton along the way.
Spearfish is in the Black Hills of South Dakota. Although Spearfish is a small community with 14,000 residents, it is the commercial and academic center for several towns in the Black Hills and nearby Wyoming and Montana, attracting more than a million visitors each year with its museums, festivals and natural beauty.
The longest stretch is about 351.4 miles on I 90. The full list of main roads is in the Roads section above.
Yes — we found about 24 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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 Freeman, 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. There are 24 rest areas along the route for bathroom stops.
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 (East Jackson Boulevard): Navigation decision point; at 0.6 miles: Multiple destination signs - pick the right one; at 352.2 miles: Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one.
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 6.1 hours each way, a round trip means 12.2 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Freeman, SD before the return drive.
