Setback?

I was concerned to notice my knee was a little swollen last night. It didn't hurt, but this is the first time I've noted swelling in a while.

I've been very active over the last 4 days while on a mini-vacation in Tennesee. I did a 21 mile backpack over 2 days on moderately demanding terrain, and then did a _little_ trail running yesterday while on a hike.

I had planned to do a treadmill run this am at the hotel, but decided to skip it when the swelling developed.

The last time I had selling was after a 300 km bike ride in June. That was similar to this: no real pain, but it makes me worry that all is not well in there.

Anyway, I'm still planning to try a 5 km race on Thanksgiving, so we'll see how the knee reacts to that.