[1] The area that is now Rimrock Mall was formerly a sugar beet farm, located in a largely undeveloped part of Billings that is now known as the West End.

[1] On its opening day on September 11, 1975, 10,000 cars were counted to have entered the mall, and police, along with auxiliaries with the Yellowstone County Sheriff's Office, had to direct traffic in the area.

[6] During the 1980s, the mall was seen as a big driver of development in the West End, and turned the area into a regional shopping destination for Montana and Wyoming.

[13] The space had sat vacant for nearly 20 years due to the presence of Wynnsong 10 in its immediate vicinity, and was used by the mall as storage.

[13] In December 2017, Krispy Kreme opened in a new building that sits on the original World West site.

Rimrock Mall officials have started to divide some of its vacant anchors into smaller retail spaces.