Do mountain goats live in the arctic tundra?

Mountain lions have the largest natural range of any predator. They can be found as far north on the Northern American mainland as Canada's Yukon Territory, the northernmost tip of which is found in the Arctic circle. Thus, it is conceivable that there are mountain lions in the Arctic.

However, if you're wondering if cougars are residents of Arctic islands and the area around the north pole, the answer is no. The climate is too inhospitable for them in those arctic areas and food sources aren't varied enough to support them, especially since they're not strong swimmers, nor do they eat sea creatures.