California Wolf Information & Education

California’s known packs

Pack profiles

Expanded summaries based on CDFW’s July 2026 “California’s Known Wolves” report.

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Pack profile

Lassen Pack

Region
Southwestern Lassen and northern Plumas counties
Established
2017
Current summary
The Lassen Pack has produced a litter every year since 2017, including at least two pups in 2026. Its current breeding female is now identified as CA019 under CDFW's statewide ID system, while CA028 has sired each litter since 2020. The pack also survived the 2021 Dixie Fire, which burned significant portions of its summer range.
Read the CDFW source →

Pack profile

Whaleback Pack

Region
Central and eastern Siskiyou County
Established
2021
Current summary
The Whaleback Pack has reproduced every year since it was established, producing ten pups in 2025 and at least nine pups in 2026. Breeding male OR85 dispersed from Oregon’s Mount Emily Pack, while breeding female CA039 is a descendant of OR-7. The pack remains one of California’s largest and most productive.
Read the CDFW source →

Pack profile

Harvey Pack

Region
Western Lassen and eastern Shasta counties
Established
2023
Current summary
The Harvey Pack was confirmed in 2023 after reports and photographs from livestock producers and U.S. Forest Service staff. It produced eight pups in 2024, seven in 2025, and at least four pups in 2026. Its breeding female, now identified as CA049, died during a January 2026 capture operation; the circumstances remain under investigation.
Read the CDFW source →

Status under review

Yowlumni Pack

Region
Eastern Tulare and northern Kern counties
Established
2023
Current summary
The Yowlumni Pack produced six pups in 2023 and seven in 2024, but no litter was documented in 2025 or 2026. CDFW's July statewide map no longer includes Yowlumni among the eleven confirmed pack territories. After a sarcoptic mange outbreak and three collared wolf mortalities in 2025, monitoring has produced no detections of wolves other than CA091 in the pack area since January 2026.
Read the CDFW source →

Pack profile

Diamond Pack

Region
Eastern Plumas and southern Lassen counties near Nevada
Established
2024
Current summary
The Diamond Pack was confirmed after public and UC Davis cameras photographed a pair in late 2023 and early 2024. Genetic analysis identified the pair as siblings from the Lassen Pack’s 2021 litter. At least two wolves remain present, although reproduction has not been confirmed.
Read the CDFW source →

Pack profile

Ice Cave Pack

Region
Eastern Tehama and northwestern Plumas counties
Established
2024
Current summary
The Ice Cave Pack was confirmed in 2024 after cameras recorded two adults and two pups south of Lassen Volcanic National Park. Six pups were documented in 2025, and genetic work identified a new breeding male, ICE03M. The pack currently ranges across parts of eastern Tehama and northwestern Plumas counties.
Read the CDFW source →

Pack profile

Ashpan Pack

Region
Eastern Shasta County north of Lassen Volcanic National Park
Established
2025
Current summary
The Ashpan Pack was recognized in April 2025 after six months of consistent wolf presence. CDFW's July 2026 update identifies CA048 and CA051, both from the Whaleback Pack's 2021 litter, in the area and confirms that CA124 produced at least five pups in June 2026.
Read the CDFW source →

Pack profile

Tunnison Pack

Region
Central Lassen County
Established
2025
Current summary
The Tunnison Pack was first documented during a livestock depredation investigation north of Susanville in fall 2024. Genetic evidence identified LAS32F from the Lassen Pack and TUN01M from Oregon’s Desolation Pack. By summer 2025, the pair was ranging across central Lassen County.
Read the CDFW source →

Pack profile

Grizzly Pack

Region
Southern Plumas County
Established
2025
Current summary
The Grizzly Pack was recognized in late 2025 after monitoring showed that two previously separate activity areas were likely one group. Genetic analysis identified DIS05M and LAS37F as the resident pair. A pup appeared on a remote camera in late summer, indicating successful reproduction.
Read the CDFW source →

Pack profile

Interstate Pack

Region
Northwestern Modoc County and the Oregon border
Established
2026
Current summary
The Interstate Pack was recognized in April 2026 after at least six months of consistent presence near the Oregon border. CDFW has recorded two wolves traveling together there since summer 2025, including male DIS06M. California and Oregon biologists continue joint monitoring because the group may overlap both states.
Read the CDFW source →

Pack profile

Whitehorse Pack

Region
Southwestern Modoc County
Established
2026
Current summary
The Whitehorse Pack was recognized in April 2026 following repeated camera, track, scat, and genetic detections. The pair includes CA164 and CA077, a female from the Whaleback Pack's 2023 litter. CDFW confirmed reproduction through genetic analysis, with a minimum of five pups in 2026.
Read the CDFW source →

Pack profile

Long Valley Pack

Region
Eastern Sierra County
Established
2026
Current summary
The Long Valley Pack was recognized in April 2026 after three wolves were genetically confirmed in eastern Sierra County. One was BEY08F, a female that dispersed from the Beyem Seyo Pack; the others traced to the Whaleback Pack and an unknown source. At least two wolves continued to be recorded into 2026.
Read the CDFW source →