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?

<P0-S0> 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. <P0-S1>  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. <P0-S2>  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. <SEP> <P1-S0> 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. <P1-S1>  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. <P1-S2>  From Cermak Road on the Westchester/La Grange Park border and points to the south, it is known as La Grange Road. <P1-S3>  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. <P1-S4>  One major landmark of Mannheim Road is the Allstate Arena at the intersection of Mannheim Road and Lunt Avenue in Rosemont. <P1-S5>  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. <P1-S6>  Also, there is an overpass that carries Mannheim Rd over the Union Pacific rail yard. <P1-S7>  Also there is another overpass that carries the street over the Canadian Pacific railroad yard. <P1-S8>  At the descent of that overpass the road goes under the Tri-State Tollway. <P1-S9>  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. <P1-S10>  North Avenue also dips under Mannheim Road in Melrose Park. <SEP> <P2-S0>  The park property is bisected by U.S. Route 20 and Oregon Route 126, creating three separate parcels. <P2-S1>  The park covers 28 acre of undeveloped forest land along Whychus Creek. <P2-S2>  It is adjacent to two developed city parks that were once part of the state park. <P2-S3>  Sisters State Park is administered by the Oregon Parks and Recreation Department. <P2-S4> Sisters State Park is a state park located at the southeast side of the town of Sisters in Deschutes County, Oregon, United States. <SEP> <P3-S0> 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. <P3-S1>  Spanning 3365 mi , it is the longest road in the United States, and the route roughly parallels that of Interstate 90 (I-90). <P3-S2>  There is a discontinuity in the official designation of US 20 through Yellowstone National Park, with unnumbered roads used to traverse the park. <P3-S3>  The "0" in its route number indicates that US 20 is a coast-to-coast route.