Ruidoso Gets New Waterpark Posted by Martin Fernandez Jr on June 20, 2019 in Mesilla Valley News The Wibit Waterpark is now open at Grindstone Lake in Ruidoso. The park features floating inflatable obstacles with monkey bars, tunnels and more. The park will be open Wednesday through Sunday from 10-a.m. to 6-p.m. the rest of the summer.