Looking across at the grassy area which has the campground and swim beach. May 14, 2012 by Matt ThomasLooking across at the grassy area which has the campground and swim beach. Highline Lake State Park About Matt Thomas Matt is an avid writer and explorer, who loves to showcase his home state of Colorado. His favorite place to be is right here in the Centennial State. Previous Post:Looking across at the grassy area which has the campground and swim beach.