I propose that Trails become the way to move to the Forge/Elder Village spaces. If on a turn you draw cards on a Border Region space, and do not draw any Trails or do not encounter a Trail due to having your turn end before encountering a drawn Trail, the only options for movement on your next turn is to move to the opposite Border Region space or go back to the Ravine/Thicket (whichever is currently adjacent to you). However, if on a turn you encounter a Trail and complete the encounter while still remaining on the space (you weren't sent to the Chasm, Lost City, etc) and your turn wasn't ended as a result of the encounter (ie, lost a Battle or Psychic Combat) then you immediately move to the adjacent Forge/Elder Village space and you immediately encounter that space. Basically, the Trail encounter takes you to the destination.
I quite like this idea, tying trails into movement in the realm. I think it could be good to also add the option to stay in the same place if you don't encounter a trail, as otherwise it would be 50/50 whether you end up in the forge or village.