Washington County topographic maps

Average elevation: 479 ft

Average elevation: 230 ft

The drainage area of the river is approximately 712 square miles (1,840 km2) with 27 creeks feeding into the Tualatin. Its watershed is 15 percent urbanized, 35 percent agricultural, and 50 percent forested. The river drops 1,800 feet (550 m) in elevation during its first 12 miles (19 km) and then only an…

Average elevation: 384 ft

Average elevation: 420 ft

Average elevation: 180 ft

Average elevation: 308 ft

Average elevation: 420 ft

Average elevation: 164 ft

Average elevation: 187 ft

Average elevation: 230 ft

Average elevation: 246 ft

Average elevation: 200 ft

Average elevation: 217 ft

Average elevation: 223 ft

Average elevation: 161 ft

Average elevation: 272 ft

Average elevation: 230 ft

Average elevation: 184 ft

Hillsboro is located at 45°31′N 122°59′W / 45.517°N 122.983°W / 45.517; -122.983 (Hillsboro, Oregon). The United States Census Bureau reports the city has a total area of 21.6 square miles (55.9 km2), all of which is land. In 2013, Hillsboro itself reported an area of 23.88 square miles…

Average elevation: 174 ft

Average elevation: 371 ft

Beaverton covers a total area of 19.7 square miles (51 km2), all of it land except for small creeks, ponds, and lakes. The city is located along the eastern edge of the Tualatin Valley just west of the Tualatin Mountains. It is bordered by Portland to the east, Hillsboro to the west, and Tigard to the south.…

Average elevation: 348 ft