Jackson Demonstration State Forest is the largest demonstration forest operated by the State of California. The forest is entirely located within Mendocino County on land formerly owned by Caspar Lumber Company along California State Highway 20 between Willits and the coastal city of Fort Bragg. It is managed by the California Department of Forestry and Fire Protection. Logging of the area began in 1862, and intense industrial logging has taken place for many decades. There have been several generations of harvests and replantings. The 48,652 acres (196.89 km²) that make up the forest were purchased in 1947 and the demonstration forest was created in 1949. Coast redwood is the most common type of tree in the forest, but there is also Douglas fir, grand fir, hemlock, bishop pine, tanoak, alder, madrone and bay myrtle. The elevation of the land varies from 80 to 2,200 feet (670 m). Precipitation near the coast averages 39 inches (990 mm) per year, but the average is 70 inches (1,800 mm) per year inland.