I went through and scribbled comments on the photos I thought could be a bit stronger - it just so happened I made ten comments!
Here goes -
2 - Needs focus on the eyes, not the peak of the cap
3 - Needs the runner's face
5 - Doesn't tell a story
6 - I'd like to see the next couple of frames to hit the key point of the action
9 - Ref makes it look cluttered
13 - Needs more of the face/eyes
19 - No. 12 in the foreground spoils the shot
24 - I'd prefer the focus on the faces
27 - The crop of the girl's hair is distracting
35 - I'd prefer a closer crop
Hope that's ok.

