Six Flags over Texas opens for the season on Feb. 28, and the park is celebrating with its Spring Fever Pass. Purchase the pass by March 8 for $39.99, and you’ll get unlimited visits to the park through May 31. If you’re a Six Flags enthusiast, you know this is a great deal, since one-day passes during the regular season normally retail for $49.99. You can buy and print your Spring Fever pass here.