I got another flat tire on the 520 trail part of my ride yesterday evening. That’s two flats in six days, not that I’m counting. They were both in the rear tire, so you might think they were related, and in a way they were. But the first flat was a slow leak from some small thing that poked a tiny hole, and I was able to ride on it for a couple miles as it went flat (and as I fruitlessly hoped it wasn’t going flat). The second one, last night, was a 1/4″ to 1/2″ long slit that emptied my tube in no time flat (so to speak).