The Riley Creek pack had almost doubled its acreage of boreal forest, high mountains, graveled riverbeds and tundra hillside.

Wildlife officials in Colorado have reported three new gray wolf packs as part of the state’s plan to rebuild populations in the area, and shared footage of three pups captured on a trail camera.

California has three new confirmed gray wolf packs: the Ashpan, Ishi, and Tunnison packs. These new packs bring the total number of known gray wolf packs in California to 10. The Ashpan and Ishi packs ...