Facheux bay is  west of Mosquito Cove. The entrance is between two steep falls in high hills. The bay runs in , with an average width of , and has deep water throughout.
Situated in a scenic area, Facheux bay is positioned to the west of Mosquito Cove, where a narrow entrance is framed by two prominent falls within a hillside landscape. Its length is defined by an average width of , and it features deep waters across its entire extent.