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Yellowstone Wolf: Project Citizen Science

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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Pack composition

ID Social status Age class Color Sex Age Mange status Birth year Birth pack Description
964MAlphaAdultGrayMale42014Since 966M's death, 964M may be the new alpha male.
No ID yetSubordinateAdultGrayFemale?Uninfected
No ID yetSubordinateAdultGrayFemale?Uninfected
Gray yearlingSubordinateAdultGrayFemale2Uninfected2016This light gray pup wanders with 1047M and is occasionally seen with Prospect Peak.
No ID yetAdultGrayUnknown1Uninfected2017Prospect Peak PackBorn in the natal den at Slough Creek.
No ID yetAdultGrayUnknown1Uninfected2017Prospect Peak PackBorn in the natal den at Slough Creek.
No ID yetAdultGrayUnknown1Uninfected2017Prospect Peak PackBorn in the natal den at Slough Creek.
No ID yetAdultGrayUnknown1Uninfected2017Prospect Peak PackBorn in the natal den at Slough Creek.
No ID yetAdultGrayUnknown1Uninfected2017Prospect Peak PackBorn in the natal den at Slough Creek.


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Past pack members

ID Social status Age class Color Sex Age Mange status Birth year Birth pack Death year Description
763MSubordinateUnknownBlackMale10Uninfected2008SW763M (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.
821FAlphaUnknownGrayFemale9Uninfected20092017Studded collar. This alpha female was killed by other wolves in April 2017 soon after she had given birth.
996MSubordinateUnknownBlackMale3Uninfected2015Prospect Peak PackOriginally a Prospect Peak wolf, he joined Junction Butte in March 2017. His collar is not functional.