Maps of California's High-Voltage Transmission Lines

Yes, several public resources display California's major transmission infrastructure:

• CAISO Interactive Map: California Independent System Operator's detailed, zoomable map with voltage, capacity, and line data.
• EIA Electricity Data Browser: U.S. Energy Information Administration's national map including California; less granular but broader context.
• Google Earth: Search "transmission lines" or "power lines" to visualize corridors via satellite imagery.

These tools help researchers, planners, and the public understand the grid's layout.