Although this is not official, the Ottawa River reaches a depth of 565 feet (172 m) in Moose Bay, which is located on the Holden Lake reservoir from the Des Joachim dam, west of Deux-Rivières.

Along with Los Alamos, New Mexico, and Oak Ridge, Tennessee, Chalk River was an offshoot of the nuclear effort for the allies and scientists, engineers, and tradesmen from around the world who came to work on the Manhattan Project.

Straight and broad avenues ran along contour lines, and narrower and winding streets lay at right angles to discourage non-local traffic from entering neighborhoods.

The streets were named after local flora, Canadian politicians and famous scientists such as Ernest Rutherford and Charles Darwin.

[3] At the same time, its economy and development were further boosted by the construction of the Des Joachim Hydroelectric Generating Station and dam on the Ottawa River at Rolphton, which opened on June 28, 1950.

[4] The town was the subject of a Maclean's Magazine article in 1958 by the noted Canadian journalist, editor, and author Peter C. Newman.

Entitled, "Deep River: Almost the Perfect Place to Live,"[5] the article took a sardonic take on the town as a very odd and isolated place populated by mostly young, male, highly-educated, and bored scientists and technicians struggling to find things to do with their time: "The Utopian town where our atomic scientists live and play has no crime, no slums, no unemployment and few mothers-in-law."

[7] Deep River is located at a latitude of 46°06' north and longitude 77°30' west, in the Boreal Forest biozone, and has an area of 50.87 square kilometres.

Avid skiers of the Deep River Cross-Country Ski Club[13] created the Silver Spoon trails and an annual race that brings contestants from across Ontario.

Another popular event is Summerfest, a festival held once every two years, hosting many local and famous artists including Sloan, Wide Mouth Mason, Amanda Wilkinson, Daniel Lanois, Mobile, and K'naan.