GPS Coordinates to the entrance to the Road to San Pedro Martir:
From Ensenada: Take Mexican Highway 1 south, about 140 km from Ensenada until you come to the small village of Ejido Diaz Ordaz. Turn left when you get to the signs for the Observatorio Astronomico Nacional and the Parque Nacional Sierra San Pedro Martir. Drive 50 km east on a paved road until you get to the Rancho Meling entrance then turn right down the dirt road about 2 km. You have arrived. Along the roadway there are several signs similar to the one below.
NOTE: It’s very important that you gas up at the PEMEX Station in Ejido Diaz Ordaz before you start driving up Rancho Meling – it’s also a good place to stop for a cold drink and use the restrooms.