The bad terrain began to leave the group behind after one day and a half of traveling. However, the temperature started to drop considerably in exchange for that. Sigma thought that going south would make things warmer, but perhaps they were too much on the southern part of that continent.
Once they reached the border between the countries, they stopped to rest for a bit since it was already night, and they could tell that the temperature was going to drop. They might as well slow down for a short while in order to rest more than usual and then move as fast as possible during the day. That was one of the few things that they could do for efficiency's sake.
During the night, Sigma studied the map of the neighboring country, and then he decided the path that they would follow. They would have to zigzag around for a while in order to avoid all cities and towns, but they will save time by avoiding conflicts.