Tirsuli is a Himalayan mountain peak in the Pithoragarh district of Kumaon Uttarakhand, India. It is part of the complex of mountains, including Tirsuli West, Hardeol, Dunagiri, Changabang, and Kalanka, which make up the northeast wall of the Nanda Devi Sanctuary, in the Garhwal Himalaya. It rises at the northern end of the Johar Valley, which drains into the Ghori Ganga.