Question: Who owns the 222 acre park in the city 7 mi west of downtown Portland?

full_context: Document 1: Tom McCall Waterfront Park: Governor Tom McCall Waterfront Park is a 36.59 acre park located in downtown Portland, Oregon, along the Willamette River. After the 1974 removal of Harbor Drive (a good example of freeway removal), the park was opened to the public in 1978. The park covers 13 tax lots is owned by the City of Portland (Portland Parks and Recreation). The park was renamed in 1984 to honor Tom McCall, the Oregon governor who pledged his support for the beautification of the west bank of the Willamette River—harkening back to the City Beautiful plans at the turn of the century that envisioned parks and greenways along the river. The park is bordered by RiverPlace to the south, the Steel Bridge to the north, Naito Parkway to the west, and Willamette River to the east. In October 2012, Waterfront Park was voted one of America's ten greatest public spaces by the American Planning Association.
Document 2: Silver Falls State Park: Silver Falls State Park is a state park in the U.S. state of Oregon, located near Silverton, about 20 mi east-southeast of Salem. It is the largest state park in Oregon with an area of more than 9000 acre , and it includes more than 24 mi of walking trails, 14 mi of horse trails, and a 4 mi bike path. Its 8.7 mi Canyon Trail/Trail of Ten Falls runs along the banks of Silver Creek and by ten waterfalls, from which the park received its name. Four of the ten falls have an amphitheater-like surrounding that allows the trail to pass behind the flow of the falls. The Silver Falls State Park Concession Building Area and the Silver Creek Youth Camp-Silver Falls State Park are separately listed on the U.S. National Register of Historic Places.
Document 3: Beaumont-Wilshire, Portland, Oregon: The Beaumont-Wilshire neighborhood of Portland, Oregon is located in the city's northeast section, on Alameda Ridge with views of Downtown, the Willamette River, and the Cascades. It is bordered by the Alameda, Concordia, Cully, Rose City Park, and Grant Park neighborhoods. "Beaumont Village", located on NE Fremont Street, from NE 33rd Ave. to NE 50th Ave., is the main commercial district in the neighborhood, but the neighborhood also lies within walking distance of the Hollywood District, a major commercial and shopping area to the south.
Document 4: Clackamas Town Center Transit Center: The Clackamas Town Center Transit Center is a bus transit center and MAX Light Rail station on the MAX Green Line, located in Clackamas County, Oregon, in the southeastern part of the Portland metropolitan area. It is the southern terminus for the I-205 MAX branch.
Document 5: Middletown Nature Gardens: The Middletown Nature Gardens is located off Randolph Road in Middletown, Connecticut. In 1995, the city of Middletown, CT purchased the 18 acre of land and dedicated it open space. This piece of land serves as a natural habitat to many plants and animals. There are many trails to walk about surrounded by an array of diverse trees and shrubs. Some of the types of trees and shrubs include red cedar, flowering dogwood, highbush blueberries, white pine, and speckled alder. The main trail is a 0.5 mi loop. Mulched side trails, which branch off the main trail, add another 0.5 mi to walk. Community volunteers maintain the park. They have erected many bluebird boxes and bat houses to house some of the natural wildlife of the park. There are also vernal pools, which are habitats for salamanders and wood frogs in the southeast corner of the park. There is even a 200-year-old sugar maple, which is called the “bee tree,” in which a large colony of bees has made it their home.
Document 6: Breitenbush Hot Springs: Breitenbush Hot Springs Retreat and Conference Center (pronunciation: BRIGHT en BUSH), commonly called Breitenbush Hot Springs or simply Breitenbush, is a worker-owned co-op featuring holistic and spiritual retreats. It is surrounded by the Willamette National Forest in Breitenbush, Marion County, Oregon, United States, 10 mi east-northeast of Detroit along the West Cascades Scenic Byway and 12 mi northwest of Mount Jefferson. The closest metropolitan area, Salem, is approximately 60 mi to the west. The retreat center is located at the site of the Breitenbush Hot Springs, which drain into the adjacent Breitenbush River.
Document 7: Richmond Nature Park: The Richmond Nature Park is a bog-forest nature park located in the city of Richmond, British Columbia. The Richmond Nature Park covers 200 acres of the raised peat bog habitat that has previously covered large sections of Lulu Island. The ever-changing environment of the Richmond Nature Park is also dominated by a wet, spongy land of mosses (specifically sphagnum moss), heath shrubs, and shrub-like trees. The park offers four walking trails that allows visitors to walk amongst the peat bog, the forest, and the pond habitat, and the opportunity to explore the wildlife of the plants and animals within the bog-forest. The Richmond Nature Park Society works on behalf of the Richmond Nature Park as a non-for-profit organization that aims in providing natural history education opportunities for visitors and residents, and through programs and events that promote the natural history of the nature park.
Document 8: Vancouver, Washington: Vancouver is a city on the north bank of the Columbia River in the U.S. State of Washington, and the largest suburb of Portland, Oregon. Incorporated in 1857, it is the fourth largest city in the state, with a population of 161,791 as of April 1, 2010 census. Vancouver is the county seat of Clark County and forms part of the Portland-Vancouver metropolitan area, the 23rd largest metropolitan area in the United States. Originally established in 1825 around Fort Vancouver, a fur-trading outpost, the city is located on the Washington–Oregon border along the Columbia River, directly north of Portland. In 2005, "Money" magazine named it No. 91 on its list of best places in America to live. In 2016, WalletHub ranks Vancouver the 39th best place to live for families in the US.
Document 9: 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. It is one of THPRD's two nature parks along with Cooper Mountain Nature Park. The park features 5 mi of trails, of which 1.5 miles are paved and 3.5 miles unpaved. The park features a diverse environment including several types of both evergreen and deciduous trees as well as creeks, wetlands, ponds, and meadows. Located on 15655 S.W. Millikan Way, at the main entrance to the park, is the Tualatin Hills Nature Center, formerly called the Tualatin Hills Nature Park Interpretive Center. The name was changed in November 2014. Nature supervisor Kristin Atman said that "six words is really a mouthful" and the new name would be more consistent with THPRD's other facilities.
Document 10: Beaverton, Oregon: Beaverton is a city in Washington County, in the U.S. state of Oregon. The city center is 7 mi west of downtown Portland in the Tualatin River Valley.
Document 11: Palo Alto Baylands Nature Preserve: The Palo Alto Baylands Nature Preserve, known officially as the Baylands Nature Preserve, is the largest tract of undisturbed marshland remaining in the San Francisco Bay. Fifteen miles of multi-use trails provide access to a unique mixture of tidal and fresh water habitats. The preserve encompasses 1,940 acres in both Palo Alto and East Palo Alto, and is owned by the city of Palo Alto, California, United States. It is an important habitat for migratory shorebirds and is considered one of the best birdwatching spots on the West Coast.
Document 12: Thorn Creek Nature Center and Preserve: Thorn Creek Woods Nature Center and Preserve is located in Will County, Illinois near the municipality of Park Forest, Illinois. It is part of the Forest Preserve District of Will County. The entranceway to Thorn Creek Woods Nature Preserve is located at 247 Monee Road, approximately 0.25 mi north of Stunkel Road, in Park Forest. The preserve is open 8:00 a.m. - dusk daily; the Nature Center is open 12:00 - 4:00 p.m. Friday- Sunday. At 830 acre , Thorn Creek Nature Preserve lies at the headwaters of Thorn Creek and consists of bottamlands, ravines, and white-oak forests interspersed with marsh and meadows. The actual nature center is located inside of an old church right off Monee Road. It is two stories and contains a nature library and nature exhibits. The trail starts behind the church and heads east into the woods. The topography varies. The trail starts off on high land before dropping down into the Thorn Creek River Valley. It then crosses the creek and goes up and out of the valley, again. The terrain is pretty rugged, especially near the river and its tributaries, because they have cut many gorges and ravines.
Document 13: Thornewood Open Space Preserve: Thornewood Open Space Preserve is a small regional park located in the Santa Cruz Mountains in San Mateo County. The park lies in the San Francisco Bay Area and is operated by the Midpeninsula Regional Open Space District. It offers approximately 1.5 mi of hiking and equestrian trails and is dog-friendly. The Schilling Lake Trail leads to Schilling Lake, a protected wildlife habitat. This trail offers brief views of the southern San Francisco Bay, Palo Alto (including Stanford University's Hoover Tower) and surrounding cities, and the Diablo Range. From Schilling Lake, the Bridle Trail leads to Old La Honda Road.
Document 14: Portland, Oregon: Portland ( ) is the largest city in the U.S. state of Oregon and the seat of Multnomah County. It is a major port in the Willamette Valley region of the Pacific Northwest, at the confluence of the Willamette and Columbia Rivers. The city covers 145 sqmi and had an estimated population of 639,863 in 2016, making it the 26th most populous city in the United States. Approximately 2,424,955 people live in the Portland metropolitan statistical area (MSA), the 25th most populous MSA in the United States. Its Combined Statistical Area (CSA) ranks 18th with a population of 3,160,488. Roughly 60% of Oregon's population resides within the Portland metropolitan area.
Document 15: Corvallis, Oregon: Corvallis is a city in central western Oregon, United States. It is the county seat of Benton County and the principal city of the Corvallis, Oregon Metropolitan Statistical Area, which encompasses all of Benton County. As of the 2010 United States Census, the population was 54,462. Its population was estimated by the Portland Research Center to be 55,298 in 2013. Corvallis is the location of Oregon State University, a large Hewlett-Packard research campus, and Good Samaritan Regional Medical Center.
ground_truth: Tualatin Hills Park and Recreation District