All you technically need to go riding is a bike. However, to get the most out of your experience, there are a number of mountain bike accessories that will enhance your safety and improve your capabilities. These range from gloves to bike lights to helmets.
There are in fact a multitude of mountain bike accessories available. Some of them will be imperative for you, and others you can probably afford to do without. It just depends on your exact needs. Examples of some of these accessories include bags, cleaners, heart rate monitors, lights, pumps, tools and more.
Beyond the accessories that attach to you or your bike, there are also those accessories that make your bike easier to store and protect. Bike racks and other storage devices can be useful for giving your bike a reliable, sturdy place at home. Similarly, you will want to have an advanced bike lock with you if you are planning to go anywhere where you will have to leave your bike unattended.