Lake Catherine is located in Lake Catherine State Park just outside of Hot Springs, Arkansas. If you're planning on goes to Hot Springs to see the national park and the historic baths, I'd suggest planning a weekend afternoon relaxing out by Lake Catherine as well. As part of the famous Diamond Lakes in the Ouachita Mountains, Lake Catherine is a perfect place to go fishing, swimming, boating, hiking, or to just relax with a picnic and some sunscreen.
One of the best things to do at Lake Catherine is to go boating and fishing. There's a shop at the marina where you can buy bait and thy have some pretty unbeatable deals on boat rentals. You have basic fishing boats for $20 a day, kayaks, slips, and even big party barges for $200 day. That' a plan right there! Get some friends, stock up on food, drinks, and good music, and spend the day enjoying the sunshine and mountain views from your own party barge!