Gallatin River
About 25% of the original grassland remains (less than 10% in Canada) and continues to decrease due to the rapid growth of the Rockies' population. Expansion of cities in both Montana and Alberta is removing habitat and blocking the movements of native species including grizzly bears, elk, mule deer and others. Growth is most intense in southwestern Montana, specifically in the Bitterroot Valley around Missoula and the area just north of Yellowstone National Park along the Gallatin River, namely in Bozeman and the resort town of Big Sky, and the Yellowstone River in Paradise Valley.