Hello, Quatro Casas is just after Colonet. Go one mile past the pemex station (exactly) and turn right at the dirt road nearest that mile mark on your odometer. It is on the Ensenada 1; and in the range of km 135-144. there is an incredible matrix of dirtroads that can be taken. The above described is the quickest and most direct link. In fact, I will be there on the weekend of the fourth in a white f-150 with a white shell and racks. Take care and good luck.