The Peninsular Ranges form the backbone of the peninsula.
 They are an uplifted and eroded Jurassic to Cretaceous batholith, part of the same original batholith chain which formed much of the Sierra Nevada mountains in U.S. California.
This chain was formed primarily as a result of the subduction of the Farallon Plate millions of years ago all along the margin of North America.

The Sierra de Juárez is the northernmost range in Mexico.

The Sierra San Pedro Mártir runs south of the Sierra Juarez and includes the peninsula's highest peak, the Picacho del Diablo.

The Sierra de San Borja runs south of the Sierra San Pedro Martir.

The volcanic complex of Tres Virgenes lies in Baja California Sur, near the border with the state of Baja California, forming the ranges south of the Sierra de San Borja.

The Sierra de la Giganta runs along the shore of the Gulf of California south of the Tres Virgenes complex.

At the south end of Baja California Sur, the Sierra de la Laguna forms an isolated mountain range rising to 2,406 metres (7,894 ft)
Another isolated range, the Sierra Vizcaino, juts out into the Pacific between Punta Eugenia and Punta Abreojos.

The two most prominent capes along the Pacific coastline of the peninsula are Punta Eugenia, located about halfway up the coast, and Cabo San Lazaro, located about a quarter of the way north from Cabo San Lucas.

The Bahia Sebastian Vizcaino, the largest bay in Baja, lies along the Pacific coast halfway up the peninsula.
 The large island of Isla Cedros is situated between the bay and the Pacific, just north of Punta Eugenia.
 Onshore southeast of the bay is the Desierto de Vizcaino, an extensive desert lying between the Sierra Vizcaino to the west, and the Tres Virgenes range which runs along the Gulf of California to the east.

The largest bays along the coastline of the Gulf are Bahia de La Paz where the city of La Paz is located, and Bahia Concepcion.
 The Bahía de los Ángeles is a small bay located west of the Canal de las Ballenas which separates the Baja California peninsula from the large island of Angel de la Guarda in the Gulf of California.
The Peninsular Ranges form the backbone of the peninsula.  They are an uplifted and eroded Jurassic to Cretaceous batholith, part of the same original batholith chain which formed much of the Sierra Nevada mountains in U.S. California. This chain was formed primarily as a result of the subduction of the Farallon Plate millions of years ago all along the margin of North America.
The Sierra de Juárez is the northernmost range in Mexico.
The Sierra San Pedro Mártir runs south of the Sierra Juarez and includes the peninsula's highest peak, the Picacho del Diablo.
The Sierra de San Borja runs south of the Sierra San Pedro Martir.
The volcanic complex of Tres Virgenes lies in Baja California Sur, near the border with the state of Baja California, forming the ranges south of the Sierra de San Borja.
The Sierra de la Giganta runs along the shore of the Gulf of California south of the Tres Virgenes complex.
At the south end of Baja California Sur, the Sierra de la Laguna forms an isolated mountain range rising to 2,406 metres (7,894 ft)
Another isolated range, the Sierra Vizcaino, juts out into the Pacific between Punta Eugenia and Punta Abreojos.
The two most prominent capes along the Pacific coastline of the peninsula are Punta Eugenia, located about halfway up the coast, and Cabo San Lazaro, located about a quarter of the way north from Cabo San Lucas.
The Bahia Sebastian Vizcaino, the largest bay in Baja, lies along the Pacific coast halfway up the peninsula.  The large island of Isla Cedros is situated between the bay and the Pacific, just north of Punta Eugenia.  Onshore southeast of the bay is the Desierto de Vizcaino, an extensive desert lying between the Sierra Vizcaino to the west, and the Tres Virgenes range which runs along the Gulf of California to the east.
The largest bays along the coastline of the Gulf are Bahia de La Paz where the city of La Paz is located, and Bahia Concepcion.  The Bahía de los Ángeles is a small bay located west of the Canal de las Ballenas which separates the Baja California peninsula from the large island of Angel de la Guarda in the Gulf of California.
Baja California Peninsula