Event Description Get an “inside” look at some of Cooper Lake’s animals. Texas State Parks are great places to relax, recreate, and recharge! Park entrance fees are $5 for adults with kids 12 and under always free. Senior Texans 65 or older will only pay $3 to enter the park daily with a Bluebonnet Pass. Unlimited park entrances for you and everyone in your vehicle can be accomplished with the purchase of a Texas State Park Annual Pass for $70 which is good for over 12 months. Buy your pass and let your Texas adventure begin! Note: All programs are free with a valid entrance permit.