Who owns the 222 acre park in the city 7 mi west of downtown Portland?
Tualatin Hills Nature Park: The Tualatin Hills Nature Park is a 222-acre nature park and wildlife preserve in Beaverton, Oregon, owned by the Tualatin Hills Park and Recreation District. Beaverton, Oregon:  The city center is 7 mi west of downtown Portland in the Tualatin River Valley.
Tualatin Hills Park and Recreation District