I visited the Wasatch Mtns in Utah last week. I stayed in a residence at about 8000ft elevation. Wondering about rubber boas..

I know of many records of rubber boas in those mountains at elevations below 7000ft. I am even knowledgeable of the flora in the habitat associated with those sightings. Just curious if rubber boas have been found at or above 8000ft? That 8000 mark seems like a transition. So hard to hike around up there when you are a coastal flat-lander like me. 6000 ft easy, 8000 ft difficult.