It is testimony to the patient observation and recording of the Lorings and of Woodward/Speciale in the 1970s that they were able to document a good sampling of the rock art at Cape Horn before it fades or erodes away. The pictographs are very faded, except for one that appears more recent with more thickly applied pigment. During a recent brief visit I found the rock art difficult to see well, or decipher, and many could not be found.
The stacked image below compares, from top: an enhanced photo from a recent visit; the Lorings sketch (published 1982 as within Site 5); and Woodward/Speciale’s interpretative rendering (1982). All the images are severely "displaced" for purposes of illustration and comparison - and to show the difficulty in seeing and documenting weathering rock art. And, by implication, the challenge of understanding the relationship of this site and its rock art within a regional context.
The top image, dramatically enhanced (Aperture) and isolated for study purposes, is well above the high river mark on a basalt cliff face. It appears to be a shield figure, which would link it to the eastern Columbia Plateau; perhaps further south. (I’ve seen a few similar petroglyphs in Owyhee Canyonlands.) Woodward notes, “Unusual is the occurrence here of numerous elements that may be abstract representations of the vulva or shield motifs” (38).
More photos: Cape Horn, Columbia River