Welcome to Sprint and to S4GRU!
Sprint is actively rolling out Spark (LTE Band 41) in the Portland metro area, which will include Troutdale.
I cannot give any specifics in this thread regarding the sites in Troutdale, but I would not be surprised to see them upgraded within the next few months, due to how quickly the Band 41 rollout seems to be occurring here. I am connecting to B41 LTE more and more each week.
As payturr mentioned, there is a wealth of information available to Sponsors and Premier Sponsors, including maps and upgrade schedules for all Sprint sites in the Oregon/SW Washington market. I definitely recommend making a donation to help keep the site funded if you are interested in learning more.
Again,