The Brennan Lake Depot was located on the shore of Lake Kipawa (then known as "Keepawa" or "Kippewa" among other variations) in South-West Quebec, near Témiscaming and the border with Ontario. A document lists these timber limits for auction in 1896-7, when the McLachlin Bros. attempted to sell their business. It lists 803.75 square miles of forest along with four depots and their attached farms. The Brennan lake depot would have been one of them, but its exact location is unknown.
In 1905, Charles Macnamara (the firm's bookkeeper) traveled to the depot to check on its progress. He wrote in his manuscript that the men there were not doing very well, with a high turnover of depot clerks and a mention of "drunken parties."