Manirang is one of the highest peaks in Himachal Pradesh. A six-week-long expedition for climbing the peak was organised by Council of Himalayan Exploration and Research under the leadership of Pradip Dasgupta. Apart from Mukhopadhyay the other members were Sailesh Chakravorty, Dilip Dutta and Prashanta Roy. The purpose of the expedition was to conduct a survey on socio religious life of the indigenous people with special reference to Buddhist culture. Different phases of the evolution of Buddhism, Buddhist art and architecture were studied. The team started from Kolkata on 2 June 1974. The team had a meeting with Dr. Y.S. Parmar, chief minister of Himachal Pradesh and got Raptan Chhering Budh, a local interpreter through him. The journey started from Tabo and continued through Poh and Dankhar. Monasteries including Tabo, Kee and Dankhar were visited and the culture and lifestyle of Buddhist were studied in detail. In Dankhar monastery they found young monks painting about Buddhist mythology on the inner walls of caves. Pradip Dasgupta met with an accident and his thigh got severely injured during the journey to the Babeh pass. After preliminary first aid, he was carried by sherpas as the journey continued. On 2 July Mukhopadhyay fell down from a height of about 200 ft and managed to escape from a sure death by falling into Spiti river as he somehow managed to hang on to a rock at the last moment. However his knee got fractured due to the impact with the stone. This was his last expedition as a climber.