Justin Trudeau three half-siblings, Kyle and Alicia, from his mother's remarriage to Fried Kemper, and Sarah, from his father's relationship with Deborah Coyne. Trudeau lived at 24 Sussex Drive, Ottawa, the official residence of Canada's prime minister, from his birth until his father's government was defeated in the federal election on May 22, 1979. The Trudeaus were expected to move into the residence of the Leader of the Official Opposition, Stornoway, at 541 Acacia Avenue in Rockcliffe Park, but because of flooding in the basement, prime minister Joe Clark offered them Harrington Lake, the prime minister's official country retreat in Gatineau Park,
Gatineau Park and deciduous forests to windswept savannas. The mountain is also home to a number of trees which are rare in the area, including some that are nearly 600 years old. For many years, a red-coloured cedar cross was located on top of King Mountain. Originally erected by Old Chelsea's parish priest, Father Maguire, it could be seen for miles around. It eventually rotted and fell over the cliff. Gatineau Park provides habitat for many species of birds including the pileated woodpecker and common loon. Turkey vultures and migrating hawks may be observed soaring on the thermals above the Eardley Escarpment.