This forest got its name after the Bilva trees which were formerly present here in abundance. This forest has an individual circumambulation of around 4 kms. Bilva tree (Aegle marmelos) has been an explicit part of the Krishna’s transcendental pastimes. Krishna used to come here for grazing his cows along with other cowherd boys. While the cows graze Krishna and his friends used to enjoy the ripe bael fruits. It is believed that Goddess Laxmi is still staying in this forest meditating and performing austerities to get the qualification for entering the Rasa Lila as no-one except the gopis have got the right to enter the Rasalila due to their pure and unconditional love for Krishna. The sacred lake of Mansarovara is also located in the Bilvavan.
Maan means anger due to jealousy and Sarovar means lake thus the lake was named as Mansarovar owing to the legend associated with the jealous anger of Sri Radharani. Once, Radharani got angry out of jealousy on seeing Krishna with other Gopis. In this fit of jealousy, she left the Rasalila and came to this Lake and hides herself here in a grove next to the lake. Krishna being separated from Radharani began to feel distressed and started searching for her madly along with other Gopis. Soon, with the help of other gopis he found Radharani sulking under a bower. Lord Krishna pacified Radharani and then he surrendered himself at her service asking for her forgiveness. This is the place where Radharani had exhibited Maan (feeling of anger due to jealousy) thus the lake is came to be known as Mansarovara.