Your total trip with all stops is around 1,010 miles / 1620 km, taking roughly 15 hours for the whole trip. If you want to see every small town along the way, you can get a full list of cities between Sioux Falls, SD and Roy, UT.
Start from Sioux Falls, South Dakota.
Rapid City, South Dakota is stopping point #1 after driving about 350 miles (560 km) or 5 hours.
Casper, Wyoming is stopping point #2 after driving about 250 miles (410 km) or 4 hours. Your total trip so far is about 600 miles or 970 km over roughly 9 hours of driving.
Rock Springs, Wyoming is stopping point #3 after driving about 230 miles (370 km) or 3.5 hours. Your total trip so far is about 830 miles or 1340 km over roughly 12.5 hours of driving.
Finally, Roy, Utah is your destination after driving about 180 miles (280 km) or 2.5 hours. Your total trip with all stops is around 1,010 miles or 1620 km, taking roughly 15 hours for the whole trip.
Travelmath helps you figure out where to stop when planning a long road trip from one location to another. The best stopping point for an overnight hotel stay or a break from driving often depends on how far or how long you want to drive before pausing to rest. You can find the closest city to your stopping point to look for hotels, or explore other cities and towns along the route. Use this as a road trip planner when you're driving cross-country or mapping a route with multiple stops.