- Grande Cache, Alberta, Canada Canada's Toughest Race: three independent races over the same 125 km of extreme mountain trails. The course crosses 3 mountain summits and gains over 17, 000 ft in elevation. All events include crossing the Smoky River. The races are open to individuals or relay teams. Come experience the newest and baddest extreme race on the block, and find out why we call it the ...canadiandeathrace.com