Onto that long downward spiral called tapering

I ended up doing an unbelievable 22.34 miles on Saturday. Holy Shit, is all I can say. And then on Sunday I did the Shamrock 5k, meaning I was half a mile away from a marathon over the two days. I have to say, it really REALLY increased my confidence going into the marathon. Not only did I get within 4 miles of the marathon distance on Saturday, but it was NOT an easy run. From the get-go I felt zapped of energy. By the time I turned around somewhere in the wilds of Gresham (more on that below) I felt like a zombie. But around mile 17 I got comfortable with my zombie-ness, and finished easily. I felt much better than I had after my brush with 20 two weeks before. I'm now paying for it, though. I've started to taper so my runs have topped off at 5 mile this week but they have not been easy. I can feel that my legs are empty. They are juice-less lead weights. I'm sure I'll get my energy back after a few more days of eating bread and taking it slow. My long run Saturday is 15 miles and it'll be on an unpaved trail, which sounds like heaven.
So how did I end up doing 22.34 miles? I have the city of Gresham and a faulty bridge to thank for that. First, the bridge. At mile 13.5 on the Springwater one of the footbridges is down. They detour the path onto a nearby road for maybe half a mile, until the road loops around and crosses the trail again past the bridge. I never really bothered to figure out how much distance the detour added because I only ran it once or twice. Turns out, it adds a lot. Plus, once you leave Portland and enter Gresham, the mile markers stop appearing every half mile and start appearing when the city of Gresham feels like paying for one. Turns out, that isn't very often. Basically they put up a marker when the path crosses a major street. Thus the 15.12 mile marker, and the 16.42. Super. I really did not want to go short of my goal again, so I soldiered on even when I was pretty sure I'd hit 10.5 miles. I finally turned around at 242nd Street. On Sunday when I mapped it, I found that I had run 11.17 miles out. Wow.