A timeline of my favorite rollercoasters in the Ohio region. By Scribblesofascribe May 7, 1927 The Racer at Kennywood opens. May 7, 1937 The Blue Streak at Conneaut Lake Park opens. The Webb men check out the Blue Streak, May 7, 1979 The Beast opens at Kings Island. May 7, 2008 Ravine Flyer II at Waldameer Park opens. Apr 7, 2017 The Millennium Force opens at Cedar Point.