Past the settlement, the route goes in a northwest direction for the rest of its path and enters in Naples as 1500 East, where it terminates at US-40.

[9] The same year, State Route 207 was created as a short spur, now Bitter Creek Road, to Rainbow.

[11] The commission proposed in 1957, and the legislature approved in 1961, the creation of State Route 264 from the Red Wash Oil Field north to US-40 at Jensen.

[13] Subsequently, the county constructed and improved two roads, one running southeast from US-40 near Naples to former SR-264, and the other continuing from old SR-264 west of the oil field to SR-45.

Both of these became part of SR-45 in 1982, when that route was moved farther west, keeping only a short piece of the 1943 alignment near Bonanza.