Yellowstone Wolf: Tracking the Packs logo

Yellowstone Wolf: Tracking the Packs

Yellowstone's wolf packs—Prospect Peak Pack

In February of 2014, SW763M, 821F, and an uncollared gray female left the 8-Mile pack to form the Prospect Peak pack. Both females were observed breeding with SW763M and three pups were observed by early summer. After 871M, the alpha male of the 8-Mile Pack, died in October of 2014, several additional wolves, including three more pups, left 8-Mile and joined the Prospect Peak pack. As of March 2015, four of Prospect Peak's subordinate males (965M, Twin, Dark Black, and Mottled Black) dispersed to the Lamar Canyon Pack within the next few months. The former alpha male, SW763M, was seen intermittently with the pack throughout 2016 and 1012M was killed by Junction Butte in the same year. The 2017 breeding season was an interesting time for Prospect Peak; 4 males left to join Junction Butte. Then, 821F was killed by other wolves in April 2017 after she had denned and given birth. Luckily, at least one Prospect Peak female denned in Slough Creek at historical, well-known den. As of June 2017, this pack is raising 5 gray pups. 3 gray Prospect pups were seen as of 9/2017 but pack composition was somewhat unknown. In early 2018, two gray females from Prospect Peak likely joined up with Crevice Lake Pack, and at least one Prospect Peak wolf was harvested. As of summer 2018, the Prospect Peak Pack seems to be dissolved, although there is still the occasional sighting of 964M. [Updated 7/2018]

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Past pack members

ID Social status Age class Color Sex Age Mange status Birth year Birth pack Death year Description
763MSubordinateUnknownBlackMale15Uninfected2008SW763M (collared by Montana Fish, Wildlife, & Parks) was a former 8-Mile wolf. Has a GPS collar and a very gray body and face. In early 2017, he joined the Junction Butte pack from Prospect Peak.
821FAlphaUnknownGrayFemale14Uninfected20092017Studded collar. This alpha female was killed by other wolves in April 2017 soon after she had given birth.
964MAlphaUnknownGrayMale92014Since 966M's death, 964M may be the new alpha male.
996MSubordinateUnknownBlackMale8Uninfected2015Prospect Peak PackOriginally a Prospect Peak wolf, he joined Junction Butte in March 2017. He has a non-functioning Vectronic GPS collar.