A nearly 9 mile, multi-use trail wraps around the lake. June 8, 2013 by Matt ThomasA nearly 9-mile, multi-use trail wraps around the lake. Barr Lake State Park 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:A nearly 9 mile, multi-use trail wraps around the lake.