Go to the corps site or annual day pass. on the computer. They have a downloadable form or call the number ( cant find it right now) Stockton office or kansas city. you can buy them at the campgrounds when open in March. If you are 65 years young buy you a one time $10 senior card you can use it as a day pass at any lake plus lets you into any Federal park. Get the green cover for it and hang on your mirror like the day pas. hope this helps