The more obviously hazardous but more jaw-dropping of the two routes across the mountain, the upper mountain pass offers some awe-inspiring views of both sides of the island but is a much tougher trek. It features a high incline, slippery snow and ice patches, as well as some potentially precipitous drops. The upper mountain pass is also home to a herd of mountain goats and is the nesting site for a few species of migratory birds.

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Halfway up the mountain is a plateau where the hot spring can be found. Originally a roughly cut circle in the rockface of the mountain, time and some work from the residents of the island has seen it become more inviting. The sharper edges have been smoothed down and some steps have been carved into the rock, although these can still be slippery. A pathway had previously been worn into the ground but is now obscured by a combination of weathering and rockfall over the years the island has been abandoned. The water of the hot spring itself is still warm and inviting and is the perfect temperature to soothe aching muscles and bones after a long hike.

Formerly kept clear by the foot passage back and forth between the different halves of the island, the lower mountain pass has become a wasteland of loose rocks, potholes, and overgrown plants, making it take effort to navigate. As the former connecting path between the research station and the village on the side of the island, the lower mountain pass is still easy to follow and is wider with barriers on its steeper sides to help the people that used to make use of it. While obviously at a lower elevation than the upper mountain pass, the lower pass is still raised above other parts of the island; if one was to leave the path and follow the slopes down, they would find themselves either on the old road or in the tundra forest.

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If one was to travel just off the beaten track of the low mountain pass and through some rougher terrain, they would eventually come across a cave within the side of the mountain. While not particularly deep, it still goes far enough inside the mountain that one would need a light source to see. A quick investigation of the dark interior of the cave would quickly reveal a large collection of bones—mainly goat and deer—used by a predator of some kind that used to be present on the island but appears to have vanished.