The gorge covers 5.28 sq. kms. and falls under Lendrika Reserve Forest. The Mandasaru Gorge is around 820 feet deep from the main land plateau, which is 2500 feet above sea level. The Mandasaru Village, from which the gorge gets its name, falls under the Gumamaha Panchayat – 12 kms from the nearest main town of Raikia and 90 kms from Phulbani.