I have long since given up trying to decipher these paintings. I have been out with groups to some of these sites and had everyone come up with a different interpretation (and frequently half of the group is local Indians).
Here is the text associated with the one I posted:
Plateau Pictograph.Aboriginal rock paintings, or pictographs, are common through the southern interior of British Columbia. With few exceptions they were painted with red-ochre pigment, probably originally mixed with animal oil or fish eggs as binding agents. They depict a tremendous variety of subjects, ranging from simple maps, through hunting scenes, to mythological and spiritual figures. This rock painting, in the Okanagan area of the southern Plateau, seems to represent a supernatural creature. Such designs may have been created by adolescents on ritual solo quests for a personal guardian spirit. Most surviving pictographs are believed to be no more than 200-300 years old, although none have been positively dated. Source