The da Vinci Days’ Graand Kinetic Challenge is a 2-day race where human-powered, pedal-pushed, kinetic art sculpture vehicles compete over a course that runs throughout Corvallis, traversing over land, over sand, through mud, and floating on the Willamette River.  The best viewing spots on Saturday, July 18th, will be at OSU’s PRAx (Start & Finish Line), Campus Way, and Benton County Fairgrounds for the Sand Dune Challenge.  For Sunday, July 19th, head down to Crystal Lake Park for the Mud Bog Challenge and the Willamette River Entry.  Teams exit at Michael’s Landing to the Finish Line at Riverfront Park in front of Sugar J’s, where you can meet the teams and ask about their art + engineering sculptures.