One of the bigger islands in the bay, Collanmore was a base of Les Glénans, a non-profit sailing school.

The base taught dinghy and catamaran sailing and sail-boarding.

It is accessed by boat from Rosmoney pier, a few kilometres from Westport, County Mayo.

[1] The table below reports data on Collanmore's population taken from Discover the Islands of Ireland (Alex Ritsema, Collins Press, 1999) and the Census of Ireland.

This article related to the geography of County Mayo, Ireland is a stub.