Mark:
I have son that lives in Utah so he might have an answer to your question ---I'll ask.

Last week I received a photo a boa individuals came across on the trail around Convict Lake on the East Side of the Sierra Nevada Mts. in Calif., Mono County.

To document that locality sighting, I copied the photo and then Googled Convict Lake to get coordinate and elvation. The elevation at the surface is at 7850 ft., not all that far below 8000 ft.

Richard F. Hoyer