Your total trip with all stops is around 630 miles / 1020 km, taking roughly 12 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 Tehran, Iran and Mashhad, Iran.
Start from Tehran, Iran.
Sari, Iran is stopping point #1 after driving about 280 km (170 miles) or 3.5 hours.
Sabzevar, Iran is stopping point #2 after driving about 500 km (310 miles) or 6 hours. Your total trip so far is about 780 km or 480 miles over roughly 9 hours of driving.
Finally, Mashhad, Iran is your destination after driving about 240 km (150 miles) or 3 hours. Your total trip with all stops is around 1020 km or 630 miles, taking roughly 12 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.