According to the mythological beliefs, in the middle of the war between Lord Ram and Ravana in the Tretaya Yug(the Silver Age), Jambavan (the unerring counselor of Ram) had suggested Veer Hanuman to bring “Bisalyakarani” so that Laxman would rise back to life. But as Hanuman failed to recognise the herb, Hanuman brought the whole Himalayan mass on his shoulders. While Hanuman was flying and proceding towards Lanka (the kingdom of Ravana), a portion dropped down. Hence from that day it is called Gandhamardhan. The Gandhamardhan Hill enshrines the Nrusimhanath shrine on its Northern slope and the Harishankar shrine on its Southern slope.

Besides being a home of more than 5000 rare medicinal herbs, providing medicines for fatal diseases like cancer, tuberculosis, leprosy, filaria, epilepsy, asthma, kidney and lever dysfunctions even AIDS, Gandhamardan serves as a wild life sanctuary for large number of rare species of birds and animals.