I've read 24 out of the 36 necessary for Mount Vancouver, which is 67% complete. I've read 41 books total for the year so 59% of the books I've read have been from the "to read" pile. I'll take that as a win. Additionally, I've been tracking the number of books I buy, and I've bought 35 this year which puts me in the plus column, having decreased my to read pile by 6 total. Here is the complete list of books read for this challenge.
I had to double check purchase dates on Amazon to determine which one I've owned the longest, but the one that has sat unread the longest is either My Cousin Rachel (ordered December 2009) or Gates of Fire . . . I don't actually know when I bought this one since I didn't buy it online but I'm pretty confident that I had it in Germany which would mean I've had it at least as long as My Cousin Rachel, and probably a bit longer. I liked both and while I wish I hadn't let them sit this long, I also didn't love either one so much that I regret not getting around to them previously.