Aerial view of the 2nd largest natural lake, San Cristobal. May 5, 2014 by Matt ThomasAerial view of the 2nd largest natural lake, San Cristobal. Silver Thread Scenic Byway About Matt Thomas Matt is an avid writer and explorer, who loves to showcase his home state of Colorado. His favorite place to be is right here in the Centennial State. Previous Post:Silver Thread Byway – Lake City-Creede