Arizona State Route 188

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State Route 188 is located in Gila County, Arizona. The route starts at U.S. Route 60 in Claypool, just west of Globe, and runs generally northwest to a junction with State Route 288, then continues alongside Lake Roosevelt. The route junctions with State Route 88, then continues through Tonto Basin and Pumpkin Center. The route originally followed a single-lane road down the canyon wall to Roosevelt Dam, then crossed the dam to the other side of the canyon. A two-lane suspension bridge upstream from the dam has now replaced this routing. State Route 188 ends at State Route 87 south of Rye.

Between Claypool and Lake Roosevelt is a old loop road labelled "Old Highway 88"; originally State Route 88 continued down 188 from Lake Roosevelt to US 60 at Claypool. State Route 188 has been widened to a multi-lane highway along part of its length.