NASA 25 Hours of Thunderhill presented by Hawk Performance at 20 Hours Ryno Ginettaleads with five to go NAPA VALLEY, Calif., (Dec. 3, 2016) - The 14th edition of the NASA 25 Hours of Thunderhill presented by Hawk Performance has five hours remaining and the pole sitting No. 57 Ryno Racing Ginetta still heads the field.  As the sun begins to rise over the 2.8-mile, 15-turn Thunderhill Raceway circuit the field is still full with 58 of 62 starters still running.  The No. ...