Texas Trail 50K

I ran the Texas Trail 50K (31 miles) at Huntsville State Park yesterday. Of the eighteen 50K's that I have run, it was my slowest. I'm not sure why. I finished in 8:50:40, compared to 7:59:05 in the Rocky Raccoon 50K at Huntsville State Park just last month. The courses were different, but I assume both are accurate. It was unseasonably warm yesterday, but I was comfortable. I never looked at my watch until I had a mile to go, but I never felt like I was running that slow. My sinus's were stilled clogged from the sinus infection from last weekend. Maybe that had something to do with it. Or, maybe I'm getting out of shape. In any case, they had a 10-hour time limit and there were several runners finishing after me.