The Tons river (the biggest tributary of the Yamuna with its source in the snowfields of the 20,720 ft high mountain, Bandarpunch) is a small volume, Class 4 river which offers an excellent adrenaline rush and adds to the excitement of being in the outdoors. You could give company to the Tons River as it lazily winds its way to the plains, stopping only to look for the best rafting deal Or splash around in a deep pool formed by a bubbling creek or bike down a boulevard of yellow mimosas and pine trees, far away from the city.