Question: Which state is Sisters State Park located in, which is bisected by U.S. Route 20, the longest road in the United States, spanning 3365 miles?

Context paragraphs:
U.S. Route 30: U.S. Route 30 (US 30) is an east–west main route of the system of United States Numbered Highways, with the highway traveling across the northern tier of the country.  It is the third longest U.S. route, after U.S. Route 20 and U.S. Route 6.  The western end of the highway is at Astoria, Oregon; the eastern end is in Atlantic City, New Jersey.  Despite long stretches of parallel and concurrent Interstate Highways, it has managed to avoid the decommissioning that has happened to other long haul routes such as U.S. Route 66.

West Virginia Route 20: West Virginia Route 20 is a major north–south state highway in the U.S. state of West Virginia.  The southern terminus of the route is at U.S. Route 52 in Bluewell, a small incorporated village near Bluefield.  The northern terminus is at West Virginia Route 7 three miles (5 km) east of New Martinsville.  WV Route 20 is the longest state route in West Virginia.

U.S. Route 20: U.S. Route 20 (US 20) is an east–west United States highway that stretches from the Pacific Northwest all the way to New England.  The "0" in its route number indicates that US 20 is a coast-to-coast route.  Spanning 3365 mi , it is the longest road in the United States, and the route roughly parallels that of Interstate 90 (I-90).  There is a discontinuity in the official designation of US 20 through Yellowstone National Park, with unnumbered roads used to traverse the park.

New Jersey Route 4: Route 4 is a state highway in Bergen County and Passaic County, New Jersey, United States.  The highway stretches 10.83 mi from Route 20 (McLean Boulevard) in Paterson east to an interchange with Interstate 95, U.S. Route 1/9, U.S. Route 46, and U.S. Route 9W at the George Washington Bridge approach in Fort Lee.  The route is a four- to six-lane 40 to divided highway its entire length, with the portion east of the Route 208 interchange in Fair Lawn a partial freeway consisting of interchanges and right-in/right-out intersections with a few businesses along the road, particularly in Paramus, where the route passes through a major shopping area consisting of numerous malls, Hackensack, Englewood, and Fort Lee.  West of Route 208, the route is a surface arterial that runs through commercial areas.  Route 4 intersects many important roads, including Route 208 in Fair Lawn and the Garden State Parkway and Route 17 in Paramus.  The highway is officially named the Mackay Highway, but is rarely referred to as such.

Mannheim Road: Mannheim Road, also known as La Grange Road from Cermak Road to U.S. Route 30 (Lincoln Highway), is a north–south major street in the near-western suburbs of Chicago.  It carries U.S. Routes 12 from Des Plaines to 95th St near Hickory Hills, 45 between Des Plaines on southwards past Frankfort, Illinois and carries U.S. Route 20 between Lake Street in Stone Park, Illinois and 95th St. near Hickory Hills, Illinois The road is named after a former town called Mannheim, Illinois that was founded by German farmers in what is now Franklin Park, Illinois.  From Cermak Road on the Westchester/La Grange Park border and points to the south, it is known as La Grange Road.  Mannheim Road skirts the eastern edge of O'Hare International Airport; numerous airport hotels and rental car services are located on the street near the airport.  One major landmark of Mannheim Road is the Allstate Arena at the intersection of Mannheim Road and Lunt Avenue in Rosemont.  There is also a Metra station on the Milwaukee West Line at Mannheim Road; in addition, Metra's BNSF Railway Line has a stop on La Grange Road in La Grange.  Also, there is an overpass that carries Mannheim Rd over the Union Pacific rail yard.  Also there is another overpass that carries the street over the Canadian Pacific railroad yard.  At the descent of that overpass the road goes under the Tri-State Tollway.  There's also a school district on the left side of the street named Mannheim School District 83 on the intersection of Grand Avenue and Mannheim Road itself in Franklin Park.  North Avenue also dips under Mannheim Road in Melrose Park.

Sisters State Park: Sisters State Park is a state park located at the southeast side of the town of Sisters in Deschutes County, Oregon, United States.  The park property is bisected by U.S. Route 20 and Oregon Route 126, creating three separate parcels.  The park covers 28 acre of undeveloped forest land along Whychus Creek.  It is adjacent to two developed city parks that were once part of the state park.  Sisters State Park is administered by the Oregon Parks and Recreation Department.

Ohio State Route 10: State Route 10 (SR 10) is a state highway located in and around Cleveland, Ohio.  The current routing of SR 10 was certified in 1934.  The route's western terminus is in Eaton Township in Lorain County at the junction of U.S. Route 20, State Route 57 and State Route 301, where US 20 and SR 301 continue westbound on the freeway.  In North Ridgeville, route 10 merges with Interstate 480 at the interstate's western terminus in North Ridgeville, and continues with the interstate briefly eastward.  Just east of this junction, the route also has an interchange with Interstate 80 and the Ohio Turnpike via a connecting or spur road.  SR 10 then becomes a grade-level road in North Ridgeville before heading into Cuyahoga County, and is known as Lorain Road.  It then continues through the western suburbs of Cleveland and through the western part of Cleveland, as Lorain Avenue, terminating shortly after it crosses the Cuyahoga River at Gateway at Broadway Avenue/Ontario Street (U.S. Route 422, State Route 8, State Route 14, State Route 43, and State Route 87).

New Jersey Route 19: Route 19 is a state highway in Passaic County, New Jersey, United States.  Also referred to as the Paterson Peripheral, it runs 3.04 mi from an intersection with County Route 509 (Broad Street) and County Route 609 (Colfax Avenue) in Clifton north to another intersection with County Route 509 (Main Street) in downtown Paterson.  Between U.S. Route 46 in Clifton and Interstate 80 in Paterson, Route 19 is a freeway.  The main purpose of the route is to connect the Garden State Parkway to I-80 and downtown Paterson.  The road was originally proposed as the Paterson spur of the Garden State Parkway that was to run north to Wayne.  In 1959, it was planned to become part of the Paterson Peripheral, an extension of Route 20 from downtown Paterson.  By 1971, the road was completed between the Garden State Parkway and I-80, at which time it received the Route 20 designation; the rest was cancelled in 1978 due to feared community disruption.  In 1988, this portion of Route 20 became Route 19 as it did not connect with the other segment of the route.  In the 1990s, Route 19 was extended to Main Street in downtown Paterson as part of a project that also completed the interchange with I-80.

U.S. Route 20 in Pennsylvania: U.S. Route 20 is an east-west U.S. Highway in Pennsylvania, which clips the northwestern corner of the state, running entirely in Erie County.  While it is part of the nation's longest road, it features the shortest segment of any two-digit U.S. route in the commonwealth.  Although bypassed by Interstate 90 as the primary through route in the area, heavy traffic has led to nearly the entire highway being upgraded to four lanes in width.

New York State Route 20N: New York State Route 20N (NY 20N) was a state highway in central New York in the United States.  It was an alternate route of U.S. Route 20 (US 20) that stretched for 30.5 mi between Marcellus and Cazenovia.  The road began at its parent route, US 20, and NY 174 in Marcellus and ended at US 20, NY 20SY, and NY 92 in Cazenovia.  All of NY 20N was concurrent with at least one other route, namely NY 174 in Marcellus, NY 175 from Marcellus to Onondaga Hill, NY 173 from Onondaga Hill to Manlius, and NY 92 and NY 20SY between Manlius and Cazenovia.  NY 20N was assigned in May 1937 and removed in 1961 along with NY 20SY.

Supporting paragraphs: Sisters State Park U.S. Route 20
Answer: Oregon