All national parks throughout the country will be free to visit throughout 2017, while youth 18 and under will have free admission throughout 2018.
This in celebration of Canada's 150th Anniversary.
"2017 marks the 150th anniversary of Canadian Confederation and we invite you to celebrate with Parks Canada! Take advantage of free admission to national parks, national historic sites and national marine conservation areas for the entire year. Get curious about Canada's unique natural treasures, hear stories about Indigenous cultures, learn to camp and paddle and celebrate the 100th anniversary of Canada’s national historic sites with us. Find adventure, fun for the whole family or a short break from the everyday in more than 200 special places across the country."
More: http://www.pc.gc.ca/.../admission.aspx