Trappers Did Not Open Routes to Alta California — Spanish Expeditions Did

Historical correction: There is no evidence that fur trappers pioneered routes to Alta California.

Who Actually Opened the Routes

1. Spanish Maritime Expeditions (1542+): Cabrillo, Vizcaíno — coastal mapping
2. Portolá Expedition (1769–1770): First land route San Diego → Monterey → San Francisco Bay (Gaspar de Portolá, Junípero Serra, Juan Crespí)
3. Anza Expeditions (1774–1776): Juan Bautista de Anza — overland route from Sonora (Tubac) to San Francisco — 1,200 miles, 240 colonists
4. Mission Chain (1769–1823): 21 missions spaced ~30 miles apart — El Camino Real as supply/communication corridor

Where Trappers Fit

• Jedediah Smith (1826): First American to reach California overland from east (via Mojave) — after Mexican independence
• Ewing Young, Kit Carson, Old Spanish Trail traders: Used existing Spanish/Mexican routes
• Trappers exploited, didn't create the California corridor

Why the Confusion?

American frontier mythology centers trappers/mountain men as pathfinders. In California, the Spanish and Mexican periods (1769–1846) did the foundational work—trappers arrived late to an established network.

Alta California's routes were imperial infrastructure, not trapper traces.