As another reviewer noted, this costume is light but breatheable, which makes it perfect for a racing outfit. As a woman, this costume fit me pretty well- not too loose and with the bottom leg portion being scrunchy material that can expand, it was the perfect height for me and probably most adult males or females.
I ran a Thanksgiving 15k canyon trail run in this outfit, and it was definitely a hit- my husband and I posed for many photos for others. I should mention that my husband also ran and he was dressed in a Pilgrim outfit so it was a really cute pair of costumes.
Regarding the run, the early part of the morning was pretty cold and it provided some warmth. After completing the full nine miles, I didn't feel overheated in it. The reason I give this 4 instead of five stars, despite it fitting pretty well and holding up overall for my run, is the fact that the back feathers are held up with thin plastic straps that were pretty cheap. The straps run through your arm, and the last mile one side snapped. It was okay and I rigged it so it would last through the rest of the run, but if you are going longer distances for your turkey trot (or maybe the weather will be windy or snowy), I would suggest creating new straps with about $3 worth of some other material  from Michaels or Walmart etc. to sew in its place and fortify it. It would have been an easy fix if I had just known beforehand that it would be an issue. For shorter runs or just wearing it to show off your tail feathers on turkey day, this probably won't be needed.
Anyway, if you are thinking of getting this for a Turkey trot or parade don't hesitate! It's bound to be a big hit!