During Wednesday's run, I felt a slight twinge climbing a small incline. However, considering it didn't last for more than a few seconds I didn't give it any further thought. A little more pain off and on during Thursday's easy run, so I laid off completely on Friday. Unfortunately, that doesn't appear to have been enough. Today was supposed to be a 20+ over slightly rolling terrain and by 6 miles my foot was not happy.
I've tried walking around a bit today with different shoes, but no luck. We'll give it a week or so, and if I can walk without any pain after that, I'll start easing back into the routine. Unfortunately, I've got a 6-hr Endurance run in 4 weeks.