Medalist Sports workers JC Castellanos, left, of Santa Rosa, California, and Jon Reveal of Tamarack, Idaho, work on the “bicycle truss” arch Thursday at Simard-Payne Memorial Park in Lewiston. The archway will serve as the entrance to the Dempsey Challenge Festival in the Park. The Dempsey Challenge on Saturday and Sunday is a fundraiser to support services to cancer patients and their families. Daryn Slover/Sun Journal