“Old Baldy” train tressel and Chochran Pond

Soon enough we came upon the most awe inspiring sight of the trip, the Big Baldwin Bridge. This trestle spans 520 feet and rises 167 feet above Baldwin Creek below. The massive metal and wooden structure is anchored at either end by water tanks, presumably to help fight the possible outbreak of fire. We were not alone on the deck of the trestle, as many other hikers enjoyed the beautiful views of the coast range and the slightly exhilarating feeling of looking down through the cracks that lie underfoot.

https://www.wweek.com/outdoors/2016/06/07/abandoned-railroad-oregon-epic-bike-path/. Building those trestles was an epic struggle.

"The Salmonberry is a rugged, remote canyon," says Ross Holloway, a former state forester who now directs the Tillamook Forest Heritage Trust. "It always has been. I guess you could call it one of the last vestiges of manifest destiny, building that railroad through the canyon."

Elmer Lytle, a Portland railroad promoter, started building the Pacific Railway & Navigation Co. line in 1905. Japanese, Polish and Hungarian immigrants dynamited the tunnels and erected the trestles, then among the tallest in the world. (At least two workers died on those trestles—killed by a runaway train car.)

Engineers dealing with blind curves, Oregon fog and nauseated passengers gave the railway another name: "Punk, Rotten & Nasty."