The deceased, identified as Peter Slanina, had come to Kasol for trekking, police said, adding that an accident during trekking had led to his death.
According to police, Slanina had come to Kasol from Chandigarh accompanied by three friends: Zeyad Seddik (Egypt), William Michael (Britain) and NRI Sukhman Preet Singh Cheema.
According to police, Slanina's friends had on Aug. 4 reported that they were on a trek when he lost his way and got separated from them.
His friends found his body yesterday inside a forest, at some distance from Chhalal village.
Police have registered a case and the body has been brought to a hospital in Kullu for a post-mortem.
The Czech embassy has been informed about the incident, police added.