The land route from Sartar to Dorastor

Take the royal road and trade roads to Furthest. That takes about two weeks or a little less. Then take a boat down the Oslir river to Alkoth and then head up the Eringulf to Lakrene. After that you should be able to travel with pilgrims to Oxhead or if you are lucky, find a caravan going to Old Wolf Fort or Hazard Fort.