The Colorado Chautauqua, located in Boulder, Colorado, United States, and started in 1898, is the only Chautauqua west of the Mississippi River still continuing in unbroken operation since the heyday of the Chautauqua Movement in the 1920s. It is one of the few such continuously operating Chautauquas remaining in the United States, and was designated a National Historic Landmark in 2006.