The greatest risk is really to take no risk at all. You've got to go out there, jump off the cliff, and take chances.
Geography of Rishikesh lends itself conveneintly for Adventure Sports. Cliff Diving is one such activity which possible only because of City's geography. Rishkesh is having a distinction of a place where ganges enters the planes after travelling around 250 kms. in rugged tarrain of himalayas. Just 4-5 Kms upstream from Rishikesh there are many rocks and boulders intruding in ganages from it's banks which makes it a natural choice for cliff diving.
You can indulge in cliff diving if you are a swimmer, fit and hold adventurous outlook. You must go along with a experience guide as they are aware about the current condition of water level and depth. Receding and preceeding water level makes some cliff safer and other dangerous.
Cliff Diving is a part of many packages provided by the service provider. You can check with your service provider for the same. For season and service providers check the following links..