Chisholm Trail is a 5.5 mile long trail that runs along side Spring Creek in central Plano in a northwestern and southeastern direction. All seven of the major thoroughfare crossings of 15th Street, Park Boulevard, Alma Drive, Parker Road, Custer Road, Spring Creek Parkway and Independence Parkway are made via trail underpasses. Chisholm Trail connects through five parks: Harrington Park and the Plano Senior Center, Big Lake Park, Memorial Park, the Dog Park and Jack Carter Park and Pool. Additionally, Chisholm Trail connects to Schimelpfenig Library, Christie Elementary, Carlisle Elementary and Schimelpfening Middle School. Chisholm Trail has more than 30 connection points to streets and parks, connects to nine proposed on-street bike routes, and to the 5.6 mile long Bluebonnet Trail which runs east and west through central Plano.