Denverites will be able to escape the scorching heat of this weekend at the Fourth Annual Coors Light South Platte RiverFest by donning their swimming gear for free stand-up paddleboarding demos. The two-day festival will also feature a variety of riverside recreational activities, a kids zone, live music, beer and food vendors and more. The South Platte RiverFest will take place in Confluence Park and on Little Raven Street downtown on Saturday and Sunday.