Hello @amberyooper, the fence rails are Eastern Hemlock. It is a great wood for using outdoors, most of the barns in this area are constructed using hemlock and some of them are over 150 years old and the ones that have been maintained are still standing.

Here is a barn that I worked on. Besides the entrance ramp that we replaced, the barn is in great shape, and the entire barn was constructed using hemlock.

The posts were made from hard maple, another wood that stands up to the elements.

Thanks for taking the time to view this post. by the way, great question.

Stay safe and have a wonderful day!