Thereafter, it intersects Quintana Lane before intersecting several minor roads. Through a scenic and rural area, MT 69 proceeds north as South Main Street as it enters Boulder. MT 69 ends at I-15, at Boulder.
MT 69's path becomes more defined after it intersects Quintana Lane and then encounters several smaller roads. As it travels through a rural area with scenic views, MT 69 is rebranded as South Main Street when it enters the town of Boulder. MT 69 ultimately reaches its endpoint at I-15 in Boulder.