Denver. Parks. Lakeside Cyclone roller coaster designed by Edward-Vettel opened My 17, 1940. Background. RMN Now Jy 14, 1974 p.3 Lakeside Amusement Park opens for the season May 11. RMN My 7, 1975 p.80 Fun house open again. Post Je 3, 1975 p.12 Ballroom apparently had two name*, "Moonlight Gardens" per RMN My 4, 1974 p.56, and "EL Patio" per photograph in picture collection. Park opens for 70th year on May 7,, 1976. Post My 70 1976 p.31 0