sentences:  From outside the park, the peak can be ascended by hiking up the Fish Hawk Creek valley, which is around one-way.It is also climbed from inside the park, by sailing to the southeasternmost tip of Yellowstone Lake, hiking down the Yellowstone River valley, and then turning to the east for the ascent.Eagle Peak wildlife are in the alpine tundra zone and may be threatened by global climate change—the gradual shift of montane fauna and flora upwards could lead to the permanent loss of some species from the park.