Temperate Rain Forest
The average yearly rainfall at Gorges State Park is over 80 inches (2032 mm) creating a temperate rain forest. The rainfall is a result of orographic lift which occurs when an air mass is forced from a low elevation to a higher elevation as it moves over rising terrain. The land at Gorges State Park rises over 2,000 feet (609 m) in just 4 miles (6.43 km). As the air mass gains altitude it expands and cools adiabatically. This cooler air cannot hold the moisture as well as warm air can, which effectively raises the relative humidity to 100%, creating clouds and frequent precipitation.
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