"a lean blond bear rose up out of the swale on the far side where it had been feeding and looked down at them with dim pig’s eyes."
Grizzly Bear (Ursus arctos horribilis)
Creative Commons AttributionGrizzly Bear (Ursus arctos horribilis) - Credit: Frank Kovalchek

The bear which attacks Glanton’s gang would have been a Grizzly Bear, a subspecies of brown bear which is also known as the silvertip bear, the North American brown bear, or simply grizzly. Although grizzly bear fur is generally brown in colour, it can vary from blonde to nearly black.

Today the grizzly bear’s range in North America is restricted to Alaska, western Canada and portions of the northwestern United States, but it once extended further south to include the Great Plains, the southwestern United States, and parts of Mexico.