The valley's northwest entrance from the San Bernardino-Riverside along Interstate 10 is known as the San Gorgonio Pass and is the second windiest place in the country. Cool coastal air is forced through the pass and mixes with the hot desert air, making the San Gorgonio Pass one of only three ideal places in California for steady, wind-generated electricity. At the San Gorgonio Pass Wind Farm, thousands of huge wind turbines spread across the desert and hills on either side of the highway greet visitors as they approach the crest of the pass and have become somewhat of a symbol of the area. The state's other wind farms are in the Tehachapi Pass between Mojave and Bakersfield and in the Altamont Pass near Livermore.