A mountain in Sri Lanka, not far from Kacchakatittha, on the right bank of the Mahāvālukagaṅga. There Paṇḍukābhaya defeated his uncles and occupied their fortified camp for two years. The mountain was the abode of yakkhas, and it was here that Paṇḍukābhaya captured the Yakkhiṇī Cetiyā, near the pond Tumbariyaṅgana in the vicinity of the mountain (Mhv.x.46, 53, 58 ff). King Mahānāma built a vihāra there (Cv.xxxvii.213).

According to the Mahāvaṃsa Ṭīkā (p.289), the mountain was also called Udumabarapabbata (°giri). There seems (See P.L.C., s.v. Udumbaragiri) to have lived at Udumbaragiri a fraternity of forest-dwelling monks who produced from among their number several scholars of great repute and monks of great piety — e.g., Kassapa and Medhaṅkara.

The mountain is identified (Ep. Zey.ii.194 ff) with the present “Gunners’ Quoin” on the right bank of the Mahāvaligaṅga.