Origin
Tyndall, SD
Evening in Tyndall on Sunday
Local time
6:10 PM
CDT
Current temp
41°F
Unavailable
Live forecast
Trip from Tyndall, SD to Rapid City, SD
Drive Time
5h 47m
Distance
331.2 mi
533 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$50
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
5h 34m
★
6 AM
5h 48m
8 AM
6h 14m
10 AM
5h 57m
12 PM
5h 54m
3 PM
5h 58m
5 PM
6h 13m
8 PM
5h 40m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Tyndall, SD
Julio Lopez
Rapid City, SD
Mike Lensing
Trip Overview
Traveling from Tyndall to Rapid City covers 331.2 miles across the South Dakota plains, a journey that typically takes about 5 hours and 47 minutes behind the wheel. Because this trek is essentially a one-day commitment, you can easily complete it in a single stretch if you get an early start. Budgeting approximately $50 for fuel should cover your needs for the trip. You will spend the vast majority of your time on major routes, utilizing a combination of SD Highway 50, SD Highway 37, and I-90. While the drive is straightforward, it is best viewed as a functional connection between the eastern and western portions of the state rather than a leisurely sightseeing tour.
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
165.6 miles from Tyndall, SD
A natural place for your longest stop of the day , about 3h 8m into the drive .
Drive Character
Expect a highly efficient, highway-focused experience, as 99% of your travel occurs on major thoroughfares. You will navigate local highways briefly before merging onto I-90, which serves as the backbone of the trip. The most significant portion of your drive involves a 274.3-mile uninterrupted stretch along the interstate, where you can maintain a steady pace across the landscape. Because the route is so heavily dominated by high-speed roads, it feels more like a transit-oriented mission than a technical driving challenge. Prepare for long, consistent miles that require focus and vigilance as you transition from the Great Plains toward your destination.
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 274.3 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on I 90 and SD Highway 37. There are only a few real navigation decisions along the way. The trickiest moment comes early in the drive near Main Street.
Route Complexity
3/10
Easy - simple navigation with a manageable amount of wheel time
This is a straightforward 5h 47m drive. You will face about 8 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: near the start (Main Street): Navigation decision point; at 0.2 miles (West 20th Avenue): Navigation decision point; at 54.6 miles (I 90; SD 37): Merge point - match speed before joining. Lane positioning matters here.
Critical Maneuvers
5 of 8 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
4
0 mi into trip
|
~0m in
|
Main Street
Turn left onto Main Street
Navigation decision point
4
0.2 mi into trip
|
~0m in
|
West 20th Avenue
Turn left onto West 20th Avenue
Navigation decision point
5
54.6 mi into trip
|
~1h 23m in
|
I 90; SD 37
Merge onto I 90; SD 37
Merge point - match speed before joining. Lane positioning matters here
Use the none lane.
5
328.9 mi into trip
|
~5h 42m 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...
7
331 mi into trip
|
~5h 46m 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 | 274.3 mi | 4h 19m |
| SD Highway 37 | 47.1 mi | 1h 10m |
| SD Highway 50 | 3.8 mi | 5m |
| I 190 | 1.4 mi | 1m |
| 303rd Street | 1.3 mi | 3m |
| South Highway 37 | 1 mi | 1m |
| West 20th Avenue | 0.5 mi | 1m |
| South Burr Street | 0.4 mi | <1m |
Longest stretch:
I 90
— 274.3 mi, about 4h 19m
Turn-by-Turn Driving Directions
Step-by-step road directions between Tyndall, SD and Rapid City, SD.
1
Start on West 18th Avenue
50 ft
·
7 sec
·
West 18th Avenue
2
Turn left onto Main Street
0.2 mi
·
30 sec
·
Main Street
3
Turn left onto West 20th Avenue
0.5 mi
·
1 min
·
West 20th Avenue
4
Continue on CR 303
1.3 mi
·
3 min
·
303rd Street
5
Turn right onto SD 37; SD 50
3.8 mi
·
5 min
·
SD Highway 50
6
Turn right onto SD 37
47 mi
·
1 hr 10 min
·
SD Highway 37
7
Continue on SD 37
1.0 mi
·
1 min
·
South Highway 37
8
Continue on SD 37
0.4 mi
·
34 sec
·
South Burr Street
9
Take the ramp
0.4 mi
·
52 sec
10
Merge onto I 90; SD 37
274 mi
·
4 hr 19 min
·
I 90; SD 37
Use the none lane.
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 none / right lanes.
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
Since this is a long, single-day drive, aim to depart Tyndall early in the morning to avoid fatigue during the final leg into Rapid City. You should plan for at least one dedicated stop to stretch your legs and refresh, especially given the lengthy 274.3-mile interstate stretch. Keep a close eye on your fuel gauge during the interstate portion to ensure you aren't caught off guard between service exits. Because the route relies so heavily on I-90, check for any major interstate construction or weather alerts before you head out. Having your $50 fuel budget ready in advance will help keep your stops quick and efficient, allowing you to reach your destination before the day is out.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 165.6 miles from Tyndall, SD, or about 3h 8m into the drive.
The longest continuous stretch on this route runs about 274.3 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 80 miles or 1h 47m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 165.6 miles or 3h 8m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 48m
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 Tyndall, 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 Tyndall, SD
This is one driving day of about 331.2 miles and 5h 47m.
Your first comfortable stop window is around 80 miles from Tyndall, 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 274.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 165.6 mi from Tyndall, SD · 3h 8m into the drive
Mid-route town
Meal stop
166 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 80 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 165.6 miles from Tyndall, 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 274.3 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
$50.31 one way
$100.61 round trip
$3.86/gal
25.4 MPG avg
116 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $55.46 | $110.91 |
| premium | $4.80 | $62.52 | $125.05 |
| diesel | $5.64 | $73.58 | $147.16 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$50
Meals
$25–$50
Total
$75–$100
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 115.9 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $35 in charging · 1 stop · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 99.4 | 1 | $34.78 | $15.90 |
| Efficient EV | 82.8 | 0 | $28.98 | $13.25 |
| EV Truck/SUV | 132.5 | 1 | $46.37 | $21.20 |
Gas CO2
116 kg
EV CO2
39 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
5:10 PM
MDT
Current temp
40°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
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
5h 47m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Tyndall, SD to Rapid City, SD covers 331.2 miles and takes about 5h 47m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are I 90, SD Highway 37, SD Highway 50. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 165.6 miles from Tyndall, SD. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $50.31 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
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.
This is a straightforward 5h 47m drive. You will face about 8 decision points, but nothing that requires special attention if you follow navigation.
The main spots that need attention: near the start (Main Street): Navigation decision point; at 0.2 miles (West 20th Avenue): Navigation decision point; at 54.6 miles (I 90; SD 37): Merge point - match speed before joining. Lane positioning matters here.
The route from Tyndall, SD to Rapid City, SD does not surface many named destination signs beyond the main corridor.
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