They routinely roll huge rocks and logs looking for food. More than 50,000 grizzlies once ranged from the Mississippi River to the Pacific Ocean and from Canada to central Mexico, occupying plains, forests, mountains, beaches, and wetlands. In the lower 48, grizzly bears currently inhabit Montana, Wyoming, Idaho, and Washington. In 1975 the grizzly was listed as threatened and received protection under the Endangered Species Act of 1973. Size is not a reliable indicator of species .
Most people overestimate the size of grizzlies.
An adult black bear can easily weigh as much or more than a female grizzly, and definitely more than a young or sub-adult grizzly of either sex. North Cascades in British Columbia and Washington State 2. Northern Continental Divide in Northern Montana and Alberta 4. Bitterroot in Northern Idaho and Western Montana 5.