Rio Grande Reservoir near the headwaters of the river. May 5, 2014 by Matt ThomasRio Grande Reservoir near the headwaters of the river. 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