From Colombo you can reach this forest on the following route.

Colombo – Maharagama – Kaluaggala – Turn Left – Many roads that can be taken to reach the borders of the forest. (1 hour)

 

This is a lowland, Diptherocarpus dominant, wet ever green  rain forest which forms the catchment are of the above two reservoirs which provides water to the city of Colombo. This forest which comes under the purview of the Forest Department is 2,150 hectares in extent and is the largest forest close to Colombo where many wet zone endemic species can be observed. As in the case with any wet zone forest in the country leeches are found here and any excursion in to the forest should be with adequate protection.

 

Birds to Look for

Green-billed Coucal, Indian Scimitar Babbler, Black-fronted Babbler, Spotted-winged Thrush, Ceylon Trogon, Ceylon Crested Drongo, Ceylon Grey Hornbill, Ceylon Small Barbet, Ceylon Jungle Fowl, Ceylon Spur Fowl, Ceylon  Green Pigeon, Emerald Dove, Green Imperial Pigeon, Brown–capped Babbler, Red-backed & Crimson-backed Woodpeckers, Lesser Yellow-naped Woodpecker, Black-capped, Yellow-browed & Black Bulbuls, Layard’s & Alexandrine Parakeets, Ceylon Lorikeet, Indian three-toed Kingfisher, Tickell’s Blue Flycatcher, Brown-capped Pygmy Woodpecker and many more. 

http://www.ceylonbirdclub.org/