We start the day with some boarding and then head over to Devils Waterhole (far south west end of the lake) for some swimming and cliff diving/jumping. We also like to head into Burnet and play Delaware Springs which is an excellent course. There are some very good hiking trails in and around Devils Waterhole and over 5 miles of hiking trails over the granite, through the trees, and along the lake.
If you want to get out on the water and enjoy the lake, call Splash Boat Rentals and they will deliver a ski boat, pontoon boat, or waverunner for you to enjoy for a few hours. If you own a boat and have time, explore some of the other Highland Lakes -- read Boating the Highland Lakes. Click here to find some other things to do in and around the area. Check out some of the nearby golf courses, read a review, and go play them. Longhorn Caverns is only 10 minutes away and they offer guided cave tours.