Mirjaveh is the town 15km from the Pakistan border. Locals assure the only reason to stop here is if you get stuck at the border. From Mirjaveh, buses and savaris leave regularly for the border and Zahedan (1.5-2 hours, 96km).
Crossing the Pakistan Border at Mirjaveh
Crossing this border is relatively painless - the painful part is the trip to Quetta. Both the border and security information here are liable to change, so research online before you set off.
The border is open from about 7am to 4.30pm Iranian time and, given Pakistan is 30 or 90 minutes ahead, about 7.30am to 5pm or 8.30am to 6pm Pakistan time; it can close at sunset in winter. Most people arrive from Bam or Zahedan either in time to take a day bus to Quetta (617km, 9-15 hours) or a night bus.
Travellers get preferential treatment on both sides of the border so the whole process rarely takes longer than an hour, even with a vehicle. To change money you will have to deal with one of the sharks who circle both sides of the border. Know the exchange rates or you will be ripped off. Don't buy bus tickets from moneychangers; buy them from the bus or in the square in Taftan. Changers can, however, help with form filling in Pakistan.
Taftan has been described, not unfairly, as hell on earth, especially in summer. If you get stuck there you will likely be put up with the police (there are cheap hotels but the police like to keep you in sight); solo women should strongly consider finding a man-pal for this trip. Moving on, all vehicles (public bus or private) have an armed soldier for the ride to Quetta. Toyota share taxis also make the trip, but it is not clear if foreigners can use these.
Coming into Iran, once the paperwork is finished you will probably be driven in a slow series of police escorts to Zahedan.