A colored photographic postcard. At the top left in red is the legend "Columbia River from St. Peter's Dome, Castle Rock in distance". In the foreground a man wearing a gray hat, red shirt, green-gold overalls, and black boots kneels at the top of a cliff on a formation identified as St. Peter's Dome. Below him is a steep but forested slope to the Columbia River below. At the bottom of the slope but further along the river is a segment of what appears to be a road or railroad right-of-way. Behind the man is a small waterfall. Beyond him is a view along the river, with Castle Rock half-obscured on the opposite shore, and mountains rising in the distance.
A tinted photographic postcard. The legend in red at the top reads "St. Peter's Dome, Columbia River, Oregon." The pillar of rock stands out in the landscape, with its dome-shaped top and stratigraphic layers. The tall formation bears scattered trees and plants. In the foreground of the photo is a forested cliff with a waterfall gushing out halfway down the slope. In the water by the near bank of the river is a steamboat. On the right side of the picture we gaze down past the woods to the river banks and a view of the Columbia and one of its islands. On the far shore are mountains.