OK, I think I finally figured out the correct route of the 5k. I did a much more realistic practice today, and I'm pretty sure I'm right because my time seemed much more accurate.
Notice that I did not say that it was a fast time, but I ran the entire way and did not die. Not dying is much more important than being fast. I have my priorities. Also, on race day I'm not going to have my cell phone or car keys in my pocket. Once I shed all of that excess weight, I should just fly.