Our hike on the Iron Goat Trail was more than just exercise. It proved to be quite an educational experience. There were many relics of the old railroad and a lot of signs telling the tale of how the railroad was built and why it was abandoned later. The Cascades get a lot of snow and in the early 20th century, the snow depths in winter were a lot more than they are now. It was not uncommon to get 15-20 feet of snow along this part of the alignment in those days.
This snow caused trouble with avalanches as a result of the amount of trees that had been cut for timber when building the railway. Landslides were also a problem in other seasons. To protect from the snow, sheds were built over the track at places most vulnerable to avalanche. This practice is continued to this day in the mountainous areas of US railroads.
These snow sheds had a reinforced concrete wall on the uphill side. A timber structure was then built out over the track to provide cover with concrete bases for the supporting timbers on the downhill side of the structure. Most of the timbers have either been removed for reuse or have decayed after a century up on the mountainside. The concrete walls are still in reasonable shape. Some spalling of the concrete has occurred but otherwise they look solid. A lot of plant life has grown over them and they do have water cascading over the top in many places. The bases for the timber supports are still visible in many places.
There are many of these sections along the trail. The first one you come across is quite a surprise but, after you have seen a few of them, they start to be normal when you get to another section. They are pretty large structures though.