There have been four sightings (reported to me by Rangers who preferred not to be idenitified) in or adjacent to Black Star Canyon, with other sightings scattered across both the Riverside and Orange County portions of the Cleveland National Forest.
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In his Boys Book of Bear Stories, historian Jim Sleeper points out that although bears have long been considered exterminated from our mountains, there are still occasional verifiable sightings. If animals as large as bears can remain well hidden in that terrain, it's certainly reasonable that a critter the size of Santiago Sam could keep a pretty low profile.
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If you know of any additional local cryptozoological lore, please let us know in the comments section below.