At present, the Sinharaja MAB Reserve covers an area of 8,800 hectares of nature and modified forests. The Reserve lies in the south-west of the island at 6⁰ 21' - 6⁰ 26' N. and 80⁰ 21' - 80⁰ 34' E. It measure 21 kilometers in length, and if 7 kilometers in width at its widest point and 3 kilometers at its narrowest. It consists of approximately 6,091 hectares (15,054 acres) of Forest Reserves and 2,773 hectares (6,850 acres) of Proposed Reserves (Figure 3).

Sri Lanka
	Figure 3 District boundaries, Forest Reserves and Proposed Reserves in Sinharaja. (Survey Department, Rakwana Sheet,1973)

                   The boundaries of the Reserve consist of several rivers and streams ; Napala dola (dola - stream) and Koskulana ganga (ganga - river) in the north ; Kalukandawa ela (ela - stream) and Pitakele ganga in the west ; and Maha dola and Gin ganga in the south. The eastern boundary however is marked by an ancient footpath which runs the village of Denuwakanda.

                   The Reserve spills over into 3 administrative districts, and the boundary which divides the Sabaragamuwa Province from the Southern Province runs through it (Figure 3).