Did you miss out on the CrossFit Open? Looking for the Spring challenge to recharge those training batteries? Then sign up for the CrossFit Thornton Spring Fling Challenge! You’ll be tested in a baseline workout (not THE baseline, but something just as devious) on the 12th of April and retested 4 weeks later. The athletes with the best improvements and best performances will win cash prizes! So sign-up now! Registration is $20. The more athletes that sign-up the bigger the prize!