Is this the bobble-head fireman race?
Good memory!
2016 - Went back and forth for the last 3 miles with a guy in the 10k. Thought I had dropped the hammer on him, only for him to pass me in the last 30m. I got the "official" 3rd place because his bib didn't register. So I gave him the trophy after the awards ceremony because he beat me fair and square.
2017 - Got one of my own with my own sprint to the finish barely beating out a small group of other runners.
This year is the first HM for them and the field has increased in size from 50 to 110. From a cursory view of the other runners, there appears to be only one other runner significantly better than me (1:20 HM PR recently). Otherwise, it's fair game for 2nd place.
(1) my daily runs are faster over the last year, but my race times while improved, are not as improved as my daily runs. I am really stumped on this.
Depends on the relationship of the pacing to your racing in a ways.
1) You could be training too fast and thus not reaping the benefits of said training. My average training pace in a week is about 29% slower than my 5k current fitness pace. So as an example, someone with a 10:00 min/mile 5k time would average on a weekly training basis around a 12:54 min/mile.
2) Or you could not be diversifying your pacing enough (i.e. working the whole spectrum of pacing from Anaerobic/VO2max to Pure Aerobic and everything in between).
3) Or you could be racing too much and not training enough.
4) Or too much fatigue from training carrying over into race day which isn't allowing you to race to your full potential.
Lots of possible explantations. But without digging into your individual data, it would be hard for me to say exactly what is going on for you.
I could run faster most every easy day, and thus my daily training pace would get faster. But my guess is my race performances might actually suffer because of it. "Don't survive the training, thrive because of it." and "Save it for race day." are two phrases I use often in my training.
(2) While my mile times have improved, my age group percentile is all over the place. I see no pattern to my finish and wonder if this data requires running the same race/route multiple times to be useful, or if there is too much variation as to the kind of entrants between races to make any sort of useful comparison.
I'd have to see it to know better. If there are races with very few runners, then a single data point will influence the % by a much larger margin. So the size of race does matter. Also, look at the general trends. There will certainly be some variation and that'll come from days you did well individually and days you just didn't have your best stuff (like my 5/24/15 Marathon which sticks out like a sore thumb). Here's mine, and even though I've steadily improved year over year there is still some variation based on a myriad of reasons. But the general trend still holds. In a big picture view, the races/routes don't have to be the same for this type of analysis to be a useful measure of improvement.