Celebrated with great devotion and fervor every year with a large number of devotees thronging the place, Kotappakonda has an interesting mythological story associated with it.

Sundudu, a cattleman, with his wife Kundiri used to live towards the south of the Trikuta hills.

Eventually, she lost all interest in her materialistic life and started penance for Sri Koteswara Swamy.

She used to visit Rudra hill every day, even during the scorching summer, to offer prayers to the Lord.

Stupefied at her deep devotion, he again appeared and told her that she need not take so many troubles to perform pujas and offer prayers, and promised her that he himself would come to her house where she could do her penance and commanded her to proceed towards her home, and that he would follow her, but advised her not to look back even once on her way to home, in spite of whatever happens.