California Big Tree Registry

I am the coordinator of the California Big Tree Registry. The California Register of Big Trees is a program of Cal Fire and the Cal Poly State University that maintains records for the largest specimen of each native and naturalized tree species growing in California. The register seeks to recognize and sustain these living landmarks. Not all champions are literal giants like the General Sherman Giant Sequoia. The National Champion Smoke Tree, for example, is a mere 17 feet tall, with a crown spread of 12 feet and circumference of 48 inches. 

California has 210 Big Tree listings, 121 National Champions and 33 Co-Champions. 

Source: http://californiabigtrees.calpoly.edu/