The Baja California Peninsula: Mexico's Landform South of California

The Baja California Peninsula extends ~1,250 km (775 miles) south from the US–Mexico border, separating the Gulf of California (Sea of Cortez) from the Pacific Ocean.

Geographic Essentials

• Length: 1,250 km (775 mi)
• Width: 40–240 km (25–150 mi)
• Area: 143,390 km² (larger than Greece, Nicaragua, or North Carolina)
• Political division: Two Mexican states — Baja California (north, capital Mexicali) and Baja California Sur (south, capital La Paz)
• Border crossing: Tijuana/San Ysidro (world's busiest land border), Mexicali/Calexico, Tecate

Geology & Ecology

• Origin: Tectonic separation from mainland (East Pacific Rise) ~12 Mya; still drifting NW ~5 cm/yr
• Desert core: Sonoran Desert (north), Vizcaíno Desert (central) — cardón cactus, cirio (boojum tree)
• Oases: Sierra de la Laguna (tropical deciduous forest), Sierra de San Francisco (rock art, UNESCO)
• Marine richness: Gulf = "world's aquarium" (Cousteau) — 900+ fish species, whales, whale sharks, vaquita (critically endangered porpoise)

Human Geography

• Population: ~4M (Tijuana 1.8M, Mexicali 1M, Ensenada 300K, La Paz 250K)
• Economy: Manufacturing (maquiladoras), tourism (Cabo San Lucas, Loreto), fishing, mining, solar/wind
• Transpeninsular Highway (MX-1): 1,700 km Tijuana → Cabo — epic road trip

Why It Matters

Baja is not "California." It's a distinct Mexican region with its own ecology, culture, and pace — accessible from San Diego but worlds apart.