Large grassy area with volleyball net, playground and lots of picnic tables. May 14, 2012 by Matt ThomasLarge grassy area with volleyball net, playground and lots of picnic tables. 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:Large grassy area with volleyball net, playground and lots of picnic tables.