Long Run - Too Long

I woke up this morning with a sore back from moving around some heavy furniture in the basement yesterday. I thought I should probably forgo my weekly long run, so as not to turn what was just discomfort into an actual injury. As the day wore on and the sun broke through the clouds, I found myself unable to resist the pull of the run. "Just a short one," I told myself. An hour, tops. As my internet connection wasn't working, I was unable to plot out a route, leaving me free to run an exploratory route - a turn here, a jog along that path, wherever I landed was fine with me. I love these kinds of runs, because there are no rules - just go for as long as you can or want to. The pitfall, unfortunately, is that I always think I can go further than I really should.
Alas, it happened again. An hour passed and I found myself downtown, by the Bessborough. Now, if you know where I live, you know that I probably shouldn't have run that far, given that my scheduled distance, even if I had been feeling up to it, was only 16 km. I called Nicole to let her know that I would be longer than my imagined one hour. She offered to come and pick me up, but I wasn't feeling too bad at this point.
Off I went, across the Broadway bridge and heading home. My feet were really starting to ache at this point and I was happy to turn onto Taylor. I usually end my runs coming home on Taylor, and as such feel that it is my home territory, even if I am still many kilometres from the end of my run. I probably should have called for a ride at this point, but the crazy part of me didn't want to concede defeat to the route I had chosen.
Well. Now I pay the price. Overall I'm sore, but not unexpectedly so. However, my right calf has decided that it no longer wants to flex when I walk, forcing me into an unusually slow, stiff-legged gait. I hope I haven't done any serious damage with my ill-advised and probably a little foolish 20 km run today.
In comparison, though, my back does not ache nearly as much :-)