You can get to Granada by motorway from anywhere in Spain. Once you are approaching Granada, you do not have to enter the city itself, but can take the ring road which takes you onto the N-323 road, which goes from Granada to the city of Motril (which is still a motorway). At Km 167 you will find there is a sign marking the exit to Lanjarón, and from that point on, it is simply a question of following the road signs to Bubión.