Washington County topographic maps

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

As of January 2020, 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…

Average elevation: 348 ft

Average elevation: 272 ft

Average elevation: 223 ft

Average elevation: 256 ft

Average elevation: 217 ft

Average elevation: 151 ft

Average elevation: 200 ft

Average elevation: 194 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: 187 ft

Average elevation: 230 ft

Average elevation: 981 ft

Average elevation: 541 ft

Average elevation: 213 ft

Average elevation: 594 ft

Average elevation: 230 ft

Average elevation: 236 ft

Average elevation: 243 ft

Average elevation: 164 ft

Average elevation: 1,047 ft

Average elevation: 328 ft

Average elevation: 217 ft