In 1942, SR 25 appeared to have a significant gap in its route. State maps from the time show a large area within Nye and Lincoln Counties where all roads had been removed. The route existed in one piece again by 1946, although it had been realigned northward and shortened to . A sizable portion of SR 25 passing through the Tonopah U.S. Army Air Force Bombing Range (now the Nellis Air Force Range and Nevada Test Site) was restricted from public travel by 1950, the restricted section being approximately the same area that was removed in 1942. To avoid the restricted area of the testing range, the west end of SR 25 was realigned by 1957. The highway connected to US 6 at Warm Springs about east of the previous terminus, heading north around the Reveille Range instead of climbing the Kawich Range within the bombing area.