It is 1.7 km long, 500 m wide and rising to 105 m. Coppermine Peninsula is linked to Alfatar Peninsula to the southeast by a narrow isthmus bounded by Carlota Cove to the north and the 1 km wide and 460 m indenting Coppermine Cove (62°22′54″S 59°41′53″W / 62.38167°S 59.69806°W / -62.38167; -59.69806) to the south.
The Coppermine Peninsula has a regime of special environmental protection under the Antarctic Treaty System.
The area is biologically rich, supporting a wide range of plant communities with associated invertebrate fauna.
An exceptional feature of the vegetation is a 1.5 ha closed carpet of the mosses Calliergon sarmentosum, Calliergidium austro-stramineum and Drepanocladus uncinatus, overlying a thick layer of wet moss peat.
Birds breeding at the site include chinstrap penguins, southern giant petrels, Wilson's storm petrels Antarctic terns, kelp gulls and brown skuas.