When it reaches East Canyon State Park, SR-65 heads north-northwest, continuing this general direction until its northern terminus in Henefer.

[3] State Route 65 was added to the state highway system in 1931, following the historic Mormon Trail as closely as practicable from SR-5 (US-30S, now I-84) in Henefer over Big Mountain Pass and through Emigration Canyon to Salt Lake City (later meeting SR-186 there).

[4] The portion of SR-65 east of Mountain Dell was removed from the route in 1945 in favor of a connection with SR-4 (US-40, now I-80) in Parley's Canyon.

Roads within This Is The Place Monument near the west end were also added to the route for the state to maintain.

[6] The state legislature removed the western portion in 1969, rerouting SR-65 to its current alignment between I-80 in Parley's Canyon and I-84 in Henefer and replacing SR-239.