The five remaining teams headed to the Canadian Arctic where icy challenges and steep hills proved to be an uphill battle. In this leg's Detour, teams had to choose between Harpoon Hunter and Igloo Builder. In Harpoon Hunter, one team member must put on snow shoes and pull their teammate on a sled one kilometer across the tundra. They must then both throw a traditional harpoon and hit a target. Once they are both successful the other team member must pull the sled back to the starting point to receive their next clue. In Igloo Builder, teams must build an igloo using only the tools provided and pre-cut blocks of ice. Once the Inuit elder feels that the igloo can withstand an arctic night, he will hand over their next clue. On this leg's Speed Bump, Tim & Tim had to lead a dog sled team across Frobisher Bay to retrieve a food cache and deliver it back to the starting point in order to continue racing. The Roadblock required one team member to consume an entire serving of Muktuk (????) – 10 pieces – to receive their next clue.