The Marble Falls LakeFest drag boat races return to Lake Marble Falls for its 26th year Aug. 11-13, 2017. Qualifying is Friday, Aug. 11, with racing on Saturday Aug. 12 and finals running Sunday, Aug. 13. A free ‘Show-n-Shine’ event is Friday night in Johnson Park, where spectators can meet the drivers and see the boats up close. Some of the teams fire up their engines so you can feel the horsepower that propels some boats to speeds over 250 mph! Courtesy 101highlandlakes.com