I am not Utahan but on the map Chute Canyon,Utah is just to the west of Goblin Valley State Park and only measures about 12 miles to the parking lot at Highway 24.
I think the 120 miles could be a typo or it could be a confusion between measuring how far her car was from her home or how far it was from her body.
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May set off to explore without any sense of direction or how to return.