The channel is named after Charles Messier, who was a French astronomer. It is a fjord in the Scandinavian sense of the word. A depth of 1,358 m has been measured in the north part of this channel, making it one of the deepest fjords in the world. Messier Channel is surrounded by the Bernardo O'Higgins National Park and the Katalalixar National Reserve.
The Fallos-Ladrillero-Picton Channel combination is an optional route to the Messier-Grappler-Wide Channels route between the Golfo de Penas and the Trinidad Channel.
Halfway the channel is the wreck of MV Captain Leonidas, who ran aground here in 1968. The hulk is used as basis for a lighthouse.