Geography Washington County, Oregon




1 geography

1.1 waterways
1.2 adjacent counties
1.3 major highways
1.4 national protected areas





geography

according u.s. census bureau, county has total area of 726 square miles (1,880 km), of 724 square miles (1,880 km) land , 2.2 square miles (5.7 km) (0.3%) water. located approximately 20 miles (32 km) west of portland. portland metro urban growth boundary (ugb) bisects county. county s highest point south saddle mountain @ 3,464 feet (1,056 m) above sea level in northern oregon coast range.


most of county in tualatin valley, surrounded tualatin mountains east , north, chehalem mountains south, , northern oregon coast range west , north. in valley river in county, tualatin river, tualatin plains, , several small hills. northern , western portions of county forested, while remainder of county includes urban areas, agricultural lands, , floodplains.


waterways

the tualatin river main river in washington county. henry hagg lake, southwest of forest grove, largest lake. willamette river lies east, columbia river northeast, , pacific ocean west of county.


adjacent counties

map of washington county



clackamas county (southeast)
clatsop county (northwest)
columbia county (north)
multnomah county (east)
tillamook county (west)
yamhill county (south)

major highways

national protected areas

tualatin river national wildlife refuge (part)




^ 2010 census gazetteer files . united states census bureau. august 22, 2012. retrieved february 28, 2015. 
^ peakbagger.com: south saddle mountain, oregon






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