Tijuana is in Southwestern Mexico.
The Baja California Peninsula -LRB- Lower California Peninsula , Peninsula de Baja California -RRB- is a peninsula in Northwestern Mexico .. peninsula. peninsula. Mexico. Mexico. Baja California. Baja California. It separates the Pacific Ocean from the Gulf of California .. Pacific Ocean. Pacific Ocean. Gulf of California. Gulf of California. The peninsula extends 1247 km from Mexicali , Baja California in the north to Cabo San Lucas , Baja California Sur in the south .. peninsula. peninsula. Mexicali. Mexicali. Baja California. Baja California. Cabo San Lucas. Cabo San Lucas. Baja California Sur. Baja California Sur. It ranges from 40 km at its narrowest to 320 km at its widest point and has approximately 3000 km of coastline and approximately 65 islands .. The total area of the Baja California Peninsula is 143390 sqkm .. Baja California. Baja California. The peninsula is separated from mainland Mexico by the Gulf of California and the Colorado River .. Gulf of California. Gulf of California. peninsula. peninsula. Mexico. Mexico. Colorado River. Colorado River. There are four main desert areas on the peninsula  : the San Felipe Desert , the Central Coast Desert , the Vizcaino Desert and the Magdalena Plain Desert .. peninsula. peninsula. Vizcaino Desert. Vizcaino Desert