I ran the U.S. Long Distance Orienteering Championships at Fishtrap Lake, running pretty strongly for the first half of the course, then becoming more tentative and less smooth and aggressive. Technically, the run was mostly good but not great, and I had a few legs with poorly planned or executed routes, on which I lost a bit of time.
About 70 minutes into the race, I noticed that I had blisters that were becoming increasingly painful. After this point, my ability to run full speed declined some. At the same time, I got somewhat tired from the possibly too-fast start. I tried to push to the finish and was quite exhausted and somewhat hungry and sleepy at the finish.
The water controls I encountered later in the course had run dry. I'm not sure whether or how much that affected me, since I had hydrated well earlier on.