Camp Collins (also known as the Fort Collins Military Reservation) was a 19th-century outpost of the United States Army in the Colorado Territory. The fort was commissioned in the summer of 1862 to protect the Overland Trail from attacks by Native Americans in a conflict that later became known as the Colorado War. Located along the Cache la Poudre River in Larimer County, it was relocated from its initial location near Laporte after a devastating flood. Its second location downstream on the Poudre was used until 1866 and became the nucleus around which the City of Fort Collins was founded.