Custom path for Pathfinding

Is this posible to add custome path for Pathfinding object in top down movement games. I mean to say Pathfinding enemy will chase player in only by the road side not in grass.

Try to put a tiled sprite with the behiavor Obstacle on top of the grass tiles for delemit the zones where the enemy can’t walk and make it invisible. I’ve used this method for a Tower Defense game test.

Yea ! thanks I know about that but I wanted to do it this way and I don’t know if its possible or not.