The highest elevation of the National Park is Sudu Kanda (White Mountain), which is 470 metres (1,540 ft) in height.

Ruins of Malagamuwa, Wilmitiya, Dasthota irrigation tanks and Kalinga Yoda Ela canal which are built by Parākramabāhu I remain in the national park.

[1] In the past water was irrigated from the Minipe anicut's left bank canal to Parakrama Samudra by Amban Ganga which had run through Wasgamuwa.

[1] The artifacts that have been recovered from the bricks of the chaitya include a bowl used by King Sri Vikrama Rajasinha and several bronze statues are now kept in the Yudangana vihara.

Wasgamuwa National Park exhibits one of the highest biodiversity among the protected areas in Sri Lanka.

Chloroxylon swietenia, Manilkara hexandra, Elaeodendron glaucum, Pterospermum canescens, Diospyros ebenum, Holoptelea intergrifolia, Pleurostylia opposita, Vitex altissima, Drypetes sepiaria, and Berrya cordifolia are dominant trees in the emergent layer.

Polyalthia korinti, Diplodiscus verrucosus, Limonia acidissima, Cassia roxburghii and Strobilanthes stenoden are common in other strata.

Lesser adjutant, yellow-fronted barbet, and Sri Lanka spurfowl are the species that visit the reservoirs and streams of the national park.

Skinks Lankascincus spp., lizards Calotes ceylonensis and Otocryptis wiegmanni, and serpent Chrysopelea taprobanica are the endangered reptile species.

Endemic Garra ceylonensis and combtail are among the 17 fish species that reside in the aquatic habitats of the park.

There is a possibility that wild animals might catch diseases by coming into contact with domestic cattle, which are released to the park's grasslands by the villagers.

[8] Environmentalists raised concern over proposed resettlement of displaced people from the construction of Moragahakanda reservoir.