You will reach the Lake after a 6 mile walk from King Edward Point towards Poa Cove. The shortest way is to walk over the Mountain, which is usually covert in snow and ice, so I suggest wearing snow shoes.
Keep in mind that your mobile phone is pretty useless out there. Close to the lake you will also see a colony of Gentoo penguins, Sea Lions, Fur Seals and Elephant Seals. I wouldn't have wondered if I would have seen dinosaurs as well...
Evans Lake is a comparatively deep lake of irregular shape lying east of Poa Cove