This one specimen was found at ~ 6000 ft growing completely underground. It was small, ~4.2 cm across. The spores were ~ 13.0-15.0 X 6.0-7.0 microns. Having never seen one of these before, I'm guessing Gastroboletus turbinatus based on the bluing of the tubes and the reddish streaks on the stem as well as the spore shape and size.