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Portola is the only incorporated city in Plumas County, California, United States. The population was 2,104 at the 2010 census, down from 2,227 at the 2000 census. Portola is located on the Middle Fork of the Feather River, and was named after Spanish explorer Gaspar de Portolá, despite his never having actually explored the surrounding area. The place name is generally mispronounced, with stress on the middle syllable, thus ignoring the accent mark in its namesake's surname. Portola is a crew change site on the Western Pacific Railroad (now Union Pacific Railroad) Feather River Route over the Sierra Nevada mountains. The city is also home to the Western Pacific Railroad Museum (formerly Portola Railroad Museum), one of the largest railroad museums in the Western US. The museum is famous for its Run A Locomotive program, where the public can participate in a "fantasy experience" program allowing them to run a railroad locomotive on the museum grounds. Portola was in the national media spotlight in 1996–1997 when a conflict occurred between the local community and the Department of Fish and Game over how to deal with an invasive species of Northern Pike in Lake Davis. The lake was chemically treated in 1997 to eradicate the fish, but they reappeared in 1999. In early September 2007, the (California Department of Fish and Game ) eradicated the pike using CFT Legumine, a new liquid formulation of rotenone (). ==Geography and climate== Portola is located at . According to the United States Census Bureau, the city has a total area of , all of it land. Portola lies in the northern Sierra Nevada near the southern border of the Cascade Range. The headwaters of the Middle Fork of the Feather River originate just east of Portola in Sierra Valley, near Beckwourth.〔(Plumas National Forest - About the Forest )〕 The Middle Fork runs through the center of Portola. Lake Davis is located approximately 6 miles north of Portola, and is a popular fishing and camping location. About 15 miles to the west and southwest of Portola, Plumas-Eureka State Park and Lakes Basin Recreation Area feature granite peaks, glacial lakes, streams, and temperate coniferous forests, which make them popular destinations for outdoor enthusiasts.〔(Plumas Eureka State Park Association - Blairsden, CA )〕〔(Communities: Lakes Basin, Plumas County Northern California )〕 Being on the eastern slopes of the Sierra Nevada, Portola has a continental Mediterranean climate (Köppen ''Dsb'') with dry summer characterised by extreme diurnal temperature swings, and cold (though not severe) and snowy winters. Frosts occur on 218 nights per year – more even than at Flagstaff, Arizona – but extreme cold is rare and temperatures below are observed on average during only 2.6 nights per winter, whilst highs top freezing on all but nine days during an average year.〔(Climatography of the United States No. 20 – Station: PORTOLA, CA (047085) )〕 During the summer, daytime temperatures can be hot, but is reached on average only once every two years.〔 Snowfall is less heavy than on the western slopes, but reached as high as in January 1916. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Portola, California」の詳細全文を読む スポンサード リンク
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