Hunting Ground: The Rockies is a sourcebook for Werewolf: The Forsaken.

Summary
From the Onyx Path catalog:

Homeland of the WolvesIt's a place of refuge, a territory where the Tribes of the Moon hold strong. Wolves run on four feet through mountain forests, and on two through urban landscapes. But even this place of refuge has its own dangers, horrors revealed only by the light of the full moon. Werewolves are not the most dangerous things that breathe the night air.Mountains by MoonlightHunting Ground: The Rockies details the Colorado Rocky Mountains as a setting for Werewolf: The Forsaken™. This book comes complete with characters, background information and huge numbers of plot hooks, as well as a long look at the spiritscape of the region. Play through the sample story provided, or any of hundreds more possible. Make this land your own.This Book includes:

Details on the werewolves of the Rockies - pack after pack usable as allies, rivals or blood enemies
History on the War for Denver and the influence of the idigam on the area, as well as the problems it creates for new arrivals
A sample story suitable for use with local, visiting or transplanted packs