Eleven black bears were introduced into the San Gabriel Mountains "near
Crystal Lake" in November 1933 from the Sierra Nevada (Burghduff,
1935:83). I do not know whether or not there have been subsequent
introductions. There are still bears present in the higher parts of the
mountains, especially north of the study area, where they seem to be
maintaining their numbers. The grizzly bear that formerly occurred in
the San Gabriel Mountains was exterminated there some years before the
black bear was introduced.