Summit County Boundaries
Prior to the creation of Colorado Territory, the land that became Colorado was divided among the territories of Kansas, Nebraska, New Mexico and Utah. Land west of the Continental Divide, including what became Summit County, belonged to Utah Territory. Colorado’s First Legislative Assembly approved legislation entitled ”An act to define county boundaries and to locate county seats in Colorado Territory,” on November 1, 1861. The act established the boundaries of Summit County as the Continental Divide on the east, Lake County on the south and, on the north and west, the territorial boundaries.