When I finally got back to the original point where I should have gone left instead of right, I saw that there weren't any sidewalks and not much of a shoulder. Plus it was getting darker by the minute. I didn't want to chance it. So today I'm going to drive it and see if running through that area is possible. I did, however, see a big group of people (runners and walkers) walking from that direction, so I'm thinking they were coming back from the park. So there's hope!
My foot felt pretty good until mile 2 or so. It didn't hurt enough to stop, so I pushed on. After 4 miles, the pain either went away or I got used to it. All in all, I managed to get 5 miles in, which I am very pleased about. To celebrate, I had one of these: