View of the Tooth Bridge, part of the Oregon Steam Navigation Co.'s Oregon Portage Railroad in the Columbia River Gorge. The Cascade Mountains rise in the background. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of Cape Horn on the Washington side of the Columbia River Gorge, looking down the Columbia River. There is a fence and large tree stump in the foreground. Loose duplicate plate in 5/1. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View of a distant Mount Hood, rising over the Columbia River. In the foreground, long fences encircle a property and a log cabin. Taken from the south side of Government Island. Loose, cropped duplicate plate in 5/1. Condition note: Exposure has faded and Mount Hood is barely visible. This plate is part of Carlton Watkin's "Sun Sketches of Columbia River Scenery" album.

View up Oneonta Gorge, looking southeast.

View of rapids on the Columbia River in the Columbia River Gorge, looking east up the river. Railroad tracks in the foreground.

Upper Cape Horn near Celilo on the Columbia River, showing the railroad tracks of the Oregon Steam Navigation Company. A telegraph pole is visible next to the tracks.

View of upper Cape Horn, near Celilo, on the Columbia River. Several people stand atop a train on the railroad tracks of the Oregon Steam Navigation Company, bordering the Columbia River.

View of the community of Celilo on the Columbia River. Taken from atop a sand dune on the Oregon side of the Columbia River Gorge, looking northwest.

View of Mt. Hood rising over the Columbia River. Taken from northeast of The Dalles.

View of the Passage of the Dalles on the Columbia River with Mt. Hood rising in the background on the left. Railroad tracks in the foreground. OHS Collection includes 2 duplicates of this mammoth plate, on different mounts.

View of the Passage of the Dalles on the Columbia River. Taken near the head of the Dalles, northeast of the city of The Dalles.

View of The Dalles, taken from the Oregon side of the Columbia River, looking east. No title on matted plate.

View of Mt. Adams, taken from Sunset Hill, south of The Dalles. The Columbia River is in the foreground.

View of The Dalles on the Columbia River, taken from the Washington side of the river. Mount Hood rises in the background. OHS Collection includes 1 duplicate of this mammoth plate, on a different mount, with the alternate title, "Mount Hood and Dalles City from Rockland. Columbia River."

View of Mt. Hood, taken from Sunset Hill, south of The Dalles.

Distant view of The Dalles on the Columbia River, taken from Sunset Hill looking northwest.

View of the Columbia River, taken near the head of Bradford's Island. Tree branch in the foreground. OHS Collection includes 1 duplicate of this mammoth plate, on a different mount, with the alternate title, "View Down the Columbia. Head of Bradfords Island. Cascades."

View of the Tooth Bridge, located west of Eagle Creek in the Columbia River Gorge and part of the Oregon Steam Navigation Co.’s Oregon Portage Railroad. Two people pose with a mule and a cart on the tracks. No title on matted plate. OHS Collection includes 1 duplicate of this mammoth plate, on a different mount, with the alternate title, "Columbia River Near the Cascades."

View from the sawmill at Eagle Creek on the Oregon Portage Railroad in the Columbia River Gorge. A house sits close to the river while a mule and 3 people stand on tracks to the right.

View of islands in the Columbia River in the Columbia River Gorge. A railroad bridge crosses the river to one island in the foreground.

View of islands in the Columbia River in the Columbia River Gorge.

View of the Cascade Rapids on the Columbia River, taken from the Oregon side of the Columbia River Gorge. Upper Block House, also known as Fort Lugenbeel, is visible in the background on the left.

View down the Columbia River from the Middle Landing of the Oregon Portage Railroad on the Oregon side of the Columbia River Gorge. The outline of Castle Rock, also known as Beacon Rock, is visible in the distance.

A steam locomotive operated by the Oregon Steam and Navigation Company on railroad tracks in the Washington Territory of the Columbia River Gorge. Upper Block House, also known as Fort Lugenbeel, is on the left while a steamboat on the Columbia River is visible in the distance on the right.

View of a train with a steam locomotive in the Columbia River Gorge. Railroad tracks are visible on both sides of the river, and the ruins of a collapsed railroad bridge are in the foreground. Several people are visible on the train and on the ground.

View of the Upper Block House, also known as Fort Lugenbeel, on the Columbia River in the Columbia River Gorge. Other buildings and a railroad bridge are also visible. OHS Collection includes 2 duplicates of this mammoth plate on different mounts. One duplicate bears Watkins' signature on the back and has the alternate title, "Upper Blockhouse, Cascades."

View of the Columbia River Gorge from the Upper Block House, also known as Fort Lugenbeel, in the Washington Territory. View looks down the Columbia River. Railroad tracks border the river.

View of the Middle Landing of the Oregon Portage Railroad at the Cascades on the Columbia River. OHS Collection includes 1 duplicate of this mammoth plate on a different mount with the alternate title, "The Middle Landing, O.R.R. Columbia River."