East of Redwood Road and the curve where it becomes 3300 South, SR-171 continues due east with two to three lanes in each direction, passing through South Salt Lake and Millcreek Township (and very small segments near former SR-181 bordering Salt Lake City), until its terminus.

It is the first road south of 2100 South that provides access, for travelers from the west, to I-15 or other points east of the Union Pacific-FrontRunner railroad right-of-way; other roads in the area are blocked by Union Pacific's Roper rail yard.

Just before reaching former SR-181, SR-171 becomes much steeper than at any point to the west (other than when it ducks under the Union Pacific-FrontRunner right-of-way), and from there it continues to climb the East Bench foothills until its terminus at I-215 in Millcreek.

[3] In 1919, when the state legislature redefined the state road system to include only a short list given in the law and any federal aid projects, West 3300 South remained as part of the Lincoln Highway,[4] and became part of SR-4 and US-40 in the 1920s,[5] but East 3300 South was given back to the county until 1935.

[6] SR-210 was created in 1941, beginning at SR-4 (now I-80) at the mouth of Parley's Canyon and running south on Wasatch Boulevard to Little Cottonwood Canyon;[7] that route was truncated in 1945, and the portion on Wasatch Boulevard between SR-171 and SR-4 became an extension of SR-171.