The most popular activities here are diving or snorkelling through the crystal-clear water and lazing in a hammock in the 'chill-out' area, contemplating the breathtaking scenery.
Mumbo Island Camp is a PADI registered resort offering beginner, advanced and specialty courses in scuba diving, as well as gear hire and casual dives. Swimming, kayaking, and birdwatching are also popular. For the more intrepid, there are boating and paddling options, exploring the granitic islands in a freshwater Rift Valley lake.
Birders can enjoy the abundant African fish-eagles amongst others; and snorkellers can view enormous numbers of the cichlid fish species; these small, colourful fish have adapted to so many variations that they are considered of comparable importance to the Galapagos finches in the study of evolution.