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Trip from Milbank, SD to Spearfish, SD

Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 18, 2026 · Editorial standards

Drive Time

8h 24m

Distance

502.6 mi

809 km

Drive Score

8/10

Great drive

Same Day?

2-day trip

Fuel Cost

$79

one way

EV Charging

Unknown

Best Time to Leave

Save up to 23 min
4 AM
8h 17m ★
6 AM
8h 24m
8 AM
8h 40m
10 AM
8h 30m
12 PM
8h 28m
3 PM
8h 30m
5 PM
8h 39m
8 PM
8h 20m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly
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city in and county seat of Grant County, South Dakota, United States

Milbank, SD

Wikimedia Commons

Downtown Spearfish, SD, SD

Spearfish, SD

Wikimedia Commons

Trip Overview

The drive from Milbank, SD to Spearfish, SD covers 502.6 miles and takes about 8h 24m behind the wheel. It usually feels better as a 2-day road trip than as one long push.

The route leans on I 90, I 29, SD Highway 15 for much of the mileage, and the overall profile is long-distance drive. The longest uninterrupted segment is about 383.8 miles on I 90. At current regular gas prices, budget about $78.58 one way before food or hotel costs.

Trip Pace

Best split across 2 days

Treat the return leg as its own travel day rather than an afterthought.

Break Rhythm

2 planned breaks

Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.

Midpoint

251.3 miles from Milbank, SD

A natural place for your longest stop of the day , about 4h 23m into the drive .

Who Is This Route For?

Family Friendly

Moderate complexity with 2 natural rest stops along the way.

Solo Traveler

8h 24m drive, plan rest stops for pacing.

First-Time Driver

Mostly highway driving (99%). Straightforward navigation.

Drive Character

At 502.6 miles and 8h 24m of driving, this is a route where fuel stops, weather, and timing matter more than any single turn. The main roads are I 90 and I 29.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 16 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 383.8 miles.

How Hard Is This Drive?

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 0.3 miles in near South Dakota Street.

Driving Effort 4/10

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 8h 24m, 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: at 0.3 miles (South Dakota Street): Navigation decision point; at 20 miles (US 212; SD 15 / US Highway 212): Navigation decision point; at 50.9 miles: Navigation decision point.

Critical Maneuvers

5 of 10 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

4
0.3 mi into trip | ~0m in | South Dakota Street

Turn left onto South Dakota Street

Navigation decision point

4
20 mi into trip | ~29m in | US 212; SD 15 / US Highway 212

Turn right onto US 212; SD 15 / US Highway 212

Navigation decision point

4
50.9 mi into trip | ~1h 12m in

Take the ramp

Navigation decision point

4
117.3 mi into trip | ~2h 14m in

Take the exit toward Interstate 90 West: Rapid City

Exit ramp - move to the correct lane early

Toward Interstate 90 West: Rapid City
5
501.6 mi into trip | ~8h 21m 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...

Main Roads

Road Distance Duration
I 90 383.8 mi 6h 5m
I 29 66.1 mi 1h 2m
SD Highway 15 39.7 mi 55m
US Highway 212 4.8 mi 7m
SD Highway 28 4 mi 6m
3rd Avenue North 1.1 mi 1m
South Dakota Street 1 mi 1m
East Jackson Boulevard 0.6 mi 1m
Longest stretch: I 90 — 383.8 mi, about 6h 5m

Turn-by-Turn Driving Directions

Step-by-step road directions between Milbank, SD and Spearfish, SD.

1

Start on US 12

0.3 mi · 26 sec · East 4th Avenue
2

Turn left onto South Dakota Street

1.0 mi · 1 min · South Dakota Street
3

Continue on SD 15

19 mi · 27 min · SD Highway 15
4

Turn right onto US 212; SD 15

4.8 mi · 7 min · US Highway 212
5

Turn left onto SD 15

9.1 mi · 13 min · SD Highway 15
6

Continue on SD 15

1.1 mi · 1 min · 3rd Avenue North
7

Continue on SD 15

12 mi · 13 min · SD Highway 15
8

Turn right onto SD 15; SD 28

4.0 mi · 6 min · SD Highway 28
9

Take the ramp

0.3 mi · 38 sec
10

Merge onto I 29

66 mi · 1 hr 2 min · I 29
11

Take the exit

0.5 mi · 1 min
Toward Interstate 90 West: Rapid City
12

Merge onto I 90

384 mi · 6 hr 5 min · I 90
13

Take the exit

0.3 mi · 43 sec
Toward Jackson Boulevard, Black Hills State University
14

Turn left onto East Jackson Boulevard

0.6 mi · 1 min · East Jackson Boulevard
15

Turn left onto I 90 Business

149 ft · 14 sec · North Main Street
16

Arrive at destination

I 90 Business

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.

This drive is better paced as a 2-day trip.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 251.3 miles from Milbank, SD, or about 4h 23m into the drive.
The longest continuous stretch on this route runs about 383.8 miles.

Consider an overnight stop or starting very early.

Departure

Before you leave

Start with fuel, water, and navigation already sorted so the first hour feels easy.

First stop

Around 111 miles or 2h 9m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 251.3 miles or 4h 23m in

This is the best place for your longest stop, a real meal, and a full fuel check.

Overnight split

Day 1 wrap after about 251.3 miles or 4h 23m

Stop before fatigue turns the last few hours into a grind. You want day two to start fresh, not just resumed.

Final approach

Final hour starts around 7h 25m

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 Milbank, 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.

+

Treat this as a 2-day road trip and book the overnight stop before the busiest arrival window.

Day 1

Settle into the route from Milbank, SD

Aim for roughly 251 miles and 4.2 hours of wheel time on this day.

Day 2

Finish the approach into Spearfish, SD

Aim for roughly 251 miles and 4.2 hours of wheel time on this day.

Your first comfortable stop window is around 111 miles from Milbank, SD.
This route usually feels better as a 2-day drive than as one long push.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on I 90 for about 383.8 miles.

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

Halfway Point

Midpoint

About 251.3 mi from Milbank, SD · 4h 23m into the drive

Downtown Mitchell, SD, SD

First major stop

Coffee and fuel

Mitchell, SD

166 mi into the route

Best for: Coffee, fuel, and an easy first stretch

This is a natural early stop once the first hours of the drive are behind you.

Popular next leg

Mitchell, SD to Fort Pierre, SD

150.8 mi · 2h 31m

city in South Dakota, United States of America

Second major stop

Overnight candidate

Fort Pierre, SD

332 mi into the route

Best for: Hotel check-in, dinner, and a fresh start

This lines up well with a realistic day-end stop if you are breaking the drive into stages.

Find hotels in Fort Pierre, SD

Overnight Options

Night 1

Fort Thompson, SD

251 mi · about 4.2h in

A practical overnight split lands near Fort Thompson, SD after about 251 miles or 4.2 hours of driving.

Find hotels

Pacing Suggestions

Madison, SD

Fuel and coffee

A short stop after about 92 miles helps settle the day before fatigue starts building.

Fort Thompson, SD

Meal break

The midpoint is around 209.5 miles from Milbank, SD, which is a good place for a longer meal and fuel stop.

Arriving in Spearfish, SD

The final approach into Spearfish, 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 Spearfish, SD.

On a multi-day trip, keep the last day a little lighter so you reach Spearfish, SD with some flexibility left in the schedule.

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.

National Parks Near This Route

Worth a detour if your schedule allows.

Mount Rushmore National Memorial

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...

23 mi from route ~57 min detour Free near mile 450.6
View on nps.gov
Badlands National Park

Badlands National Park

National Park

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 398.6
View on nps.gov

Park data from the National Park Service API. Alerts update every 2 hours.

Fuel & Cost

Regular Gas

$78.58 one way

$157.15 round trip

$3.97/gal 25.4 MPG avg 176 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.36 $86.27 $172.55
premium $4.89 $96.72 $193.44
diesel $5.61 $110.97 $221.94

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$79

Hotel (1n)

$80–$140

Meals

$50–$100

Total

$209–$319

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 175.9 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $53 in charging · 1 stop · 66% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 150.8 1 $52.77 $24.12
Efficient EV 125.7 1 $43.98 $20.10
EV Truck/SUV 201 2 $70.36 $32.17

Gas CO2

176 kg

EV CO2

59 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

Milbank, SD

Night in Milbank on Friday

Local time

11:32 PM

CDT

Current temp

71°F

Unavailable

Live forecast

Destination

Spearfish, SD

Night in Spearfish on Friday

Local time

10:32 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.

For long drives, weather on day two can matter just as much as conditions at departure, so check the whole travel window rather than only the first day.

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

2 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

8h 24m on the road

This is long enough that the arrival forecast matters almost as much as departure conditions. Recheck both ends before you roll.

Weather data from the National Weather Service. Conditions may change; check closer to your travel date.

Frequently Asked Questions

The drive from Milbank, SD to Spearfish, SD covers 502.6 miles and takes about 8h 24m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.

The main roads are I 90, I 29, SD Highway 15. Expect a mix of highway and local road driving.

Consider an overnight stop or starting very early.

Yes. This route is usually more comfortable as a 2-day drive. A sensible stopping point is after roughly 251 miles on day one.

The midpoint is about 251.3 miles from Milbank, SD. Look for rest areas, gas stations, or food options near the halfway mark.

At current regular gas prices, expect to spend about $78.58 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 2 meaningful breaks 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 8h 24m, endurance matters. Plan breaks every 2-3 hours. The 10 decision points are all manageable with basic attention.

The main spots that need attention: at 0.3 miles (South Dakota Street): Navigation decision point; at 20 miles (US 212; SD 15 / US Highway 212): Navigation decision point; at 50.9 miles: Navigation decision point.

The route from Milbank, SD to Spearfish, SD does not surface many named destination signs beyond the main corridor.

How this page is built

Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.

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