Kovind was accompanied by Chief Minister Trivendra Singh Rawat, Governor K K Paul, state assembly speaker Premchand Aggarwal and seven family members including his wife, son and daughter-in-law at Har ki Pauri's famous Brahmakund.
The president also took a pledge for Ganga conservation. Visibly overwhelmed by the experience, he described his visit in Ganga Sabha's visitors' book as "memorable".
Later, at a function held by the Divya Prem Seva Ashram in his honour, the president said the Ganga is the country's identity and efforts should be made to keep the ancient river clean.
The president, who is scheduled to visit the Himalayan shrines of Kedarnath and Badrinath tomorrow, said he was very keen to pay obeisance at the famed temples but may not be able to go because of the rainy weather.
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"If the weather permits I will go. If it doesn't I will visit them (temples) later, may be after three months. Let us see how the weather is tomorrow," he said.
He will spend the night at the Raj Bhawan in Dehradun.