Montana City was the first settlement in what was later to become Denver, Colorado. It was established during the Pikes Peak Gold Rush on the east bank of the South Platte River, just north of the confluence with Little Dry Creek, in 1858. At the time, the site was in the Kansas Territory.
The site selected because it was adjacent to placer gold diggings along the South Platte River. However, the gold diggings at Montana City proved disappointing, and the site was soon abandoned in favor of the settlement of Auraria, a few miles downstream.
The Montana City site is now Grant-Frontier Park and includes mining equipment and a log cabin replica.