In ancient times ranging from the Paleo period to the late Ceramic period, people left behind tools and artifacts in the area that is now Lory State Park. Later, the area served as a buffer zone for Plains Tribes and the Ute, who hunted bison and gathered choke cherries and plums.
In the mid-1800s, trappers, traders and settlers arrived in the area. French-Canadian trappers frequented Bellvue, and settlements like Colona and LaPorte were established.
Fort Collins emerged in 1862, serving as a military camp and later a settlement. Conflicts with Native Americans heightened as settlers moved westward.
Quarries and railroads developed in the 1870s, extracting sandstone used in various towns. Economic conditions led to quarry closures. Traces of these quarries can be found in Lory State Park.
The Howard family played a significant role in the area, settling in the late 1800s and expanding their land to 3,600 acres. In 1967, they sold 2,600 acres to the state for Lory State Park.
Horsetooth Reservoir construction began in 1937, finished in 1949 and the reservoir was filled by 1956. Some areas, like Stout, were abandoned for reservoir development.
Lory State Park was officially named in 1975, honoring Dr. Charles A. Lory. It offers recreational activities and preserves the area's unique rock formations, meadows and forests.