Between Claypool and Roosevelt Lake is an old loop road labelled "Old Highway 88"; originally State Route 88 continued down 188 from Roosevelt Lake to US 60 at Claypool. State Route 188 has been widened to a multi-lane highway along part of its length.[1]
History
SR 188 was established in 1957 from SR 88 to SR 87. On August 20, 1999, it extended over part of SR 88, completing its current length.