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Trabuco Creek (known also as Arroyo Trabuco〔) is a -long stream in coastal southern California in the United States. Rising in a rugged canyon in the Santa Ana Mountains of Orange County, the creek flows west and southwest before emptying into San Juan Creek in the city of San Juan Capistrano. Trabuco Creek's watershed drains of hilly, semi-arid land and lies mostly in Orange County, with a small portion extending northward into Riverside County. The lower section of the creek flows through three incorporated cities and is moderately polluted by urban and agricultural runoff. Tongva and Luiseño Native American people lived along the perennial stream in settlements and hunting camps for 8,000 years before the invasion of Spanish colonization.〔Associated Press. (Prehistoric milling site found in California ). USA Today. Accessed 2010-05-22.〕 ''Trabuco'' is Spanish for a Blunderbuss, a type of shotgun. Local legend attributes a Franciscan missionary friar traveling with the Gaspar de Portolà Expedition in 1769 for the story that a blunderbuss was lost in the upper canyon by the creek, and so the naming of the area. John "Don Juan" Forster received a Mexican land grant in 1846 for the canyon lands and creek and established Rancho Trabuco here. In its natural state, Trabuco Creek supported one of the most significant steelhead trout runs in Orange County, and birds, large mammals, and amphibians still flourish in riparian zones along its undeveloped portions. Trabuco Canyon along upper Trabuco Creek, and long, narrow O'Neill Regional Park, formed from the original land grant of Rancho Trabuco in 1982, are popular off-roading, hiking, fishing and camping areas in the watershed. ==Course== Trabuco Creek begins in the Trabuco Ranger District of the Cleveland National Forest, just west of the Orange–Riverside County border, at an elevation of .〔USACE, pp. 2–51〕 The headwaters of the creek are in the large and deep Trabuco Canyon just north of Los Pinos Peak and south of Trabuco Peak. The creek flows in this deep gorge for its first ,〔USACE, pp. 2–52〕 receiving Holy Jim and Falls Canyon creeks before it passes the unincorporated community of Trabuco Canyon, where Live Oak Canyon Creek joins from the right.〔 Once out of the mountains, Trabuco Creek changes from a swift mountain torrent to a meandering, braided stream crossing a wide sandy bed known as the "Plano Trabuco".〔 After entering the city limits of Rancho Santa Margarita, the creek flows southwest through the long, narrow wilderness preserve of O'Neill Regional Park. It crosses under California State Route 241, a toll road that follows the western foothills of the Santa Ana Mountains, and passes close to Lake Mission Viejo, a popular recreational lake in the city of Mission Viejo.〔〔USACE, p. 2-53〕 Still steadily bending southwards, Trabuco Creek is joined by Tijeras Canyon Creek from the left bank, then passes under a high bridge for Oso Parkway and leaves the southern boundary of the regional park.〔 After passing Saddleback College, located near the southern junction of California State Route 73 and Interstate 5, the creek flows through a residential community and is diverted into twin culverts underneath the interstate.〔〔USACE, p. 2-54〕 The creek flows over two large man-made drop structures, the first of which marks the beginning of a small canyon that it flows through almost until it reaches downtown San Juan Capistrano.〔USACE, p. 2-55〕 Passing into the northernmost extreme of San Juan Capistrano, it is joined by its largest tributary, Oso Creek, from the right. The creek flows south through orchards until it is forced into a concrete channel, passes by Mission San Juan Capistrano, and joins with San Juan Creek in downtown San Juan Capistrano.〔〔USACE, p. 2.56〕 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「Trabuco Creek」の詳細全文を読む スポンサード リンク
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