Located in Mill Creek Canyon.

Mill Creek Canyon lies east of Salt Lake City in the Wasatch Mountains and is a popular recreation area for city dwellers. It is part of the Unita-Wasatch-Cache National Forest

In 1936-37, crews paid under the Employment Recovery Act made extensive improvements to Mill Creek Canyon Park (whether state relief workers or Works Progress Administration crews is unclear). It is likely that Civilian Conservation Corps (CCC) crews were also involved in Mill Creek Canyon, since they were active in the vicinity, working out the Big Cottonwood Canyon CCC camp.

New Deal workers built an extensive system of trails, campgrounds and stone supporting walls. It is unknown exactly what work was done during the New Deal and what was added later. Maple Grove and Elbow campgrounds and the Mount Aire trail stonework are mentioned by Keller (2001). The stone work on walls and pedestrian bridges at Box Elder and Terraces campgrounds appear to be of that era, as well, so are included in the photographs below.*