The people present at the time when the shot was taken, seems adamant that there weren't any young girl with long blond hair amongst them in the group. And if you look at the height of the railing it's quite clear it must have been a somewhat small girl, since her head is in level with the railing to the left of her (although the railing does have a sharp upward incline at the end, it can hardly be that high.). Compare it with the height of the women standing on the ascending stair besides her - it reaches her waist.
Either way, it is an interesting photo, if we take the witnesses story at face value.
'Ghosts' Caught On Camera At Famed Stanley Hotel In Colorado
A photograph taken at the Colorado Hotel
The Mausling family of Aurora, Colorado, participated in a “spirit tour” at the 108-year-old Stanley Hotel in Estes Park last month. After returning home, they noticed a photo taken by John “Jay” Mausling that seemed to show a young girl walking down the stairs [MY NOTE: it rather looks to me like she's walking up the stairs, not down].
John Mausling and his wife, Jessica Martinez-Mausling, told HuffPost via email that there were no young girls in their 11-member party or on the tour.
“At first we tried to be logical and think we somehow missed her so we asked our kids, their girlfriends and our friend if they remembered seeing a little girl,” they wrote. “Nobody did. We do not remember seeing anything on the stairs when we took the picture.”