The two Divine Cultivators led Cain and the Disciples down the road, which led along the border between the two Sects. It was nominally on the Thunder Gods' side of the river that divided the two territories, but that was only because the Foot Clan side was mostly marshy and not suitable for a road to be made without going further into their territory.
The trees here were incredible, though. Clearly, the Sect's attempts to increase the energy in the area had been working, and they didn't practice mass logging because many of the trees that they passed were a dozen meters wide and had an air of ancient energy to them that gave the area a solemn presence.