Monday is Memorial Day. For many people, this holiday marks the unofficial start to the summer season. And no summer is truly complete without the perfect summer music playlist. Reporter: Billy Cruz, The California Report A race known as the “triathlon of the art world” is underway this Memorial Day weekend in Humboldt County. Founded in 1969, it’s a local tradition, where teams race homemade human-powered art vehicles over 50 miles of land, sand, water, and mud. Reporter: Anna Vignet, KQED Learn more about your ad choices. Visit megaphone.fm/adchoices