|*Greetings from the critique club*
Boy, no apologies needed for entering this shot, I think it is quite good.
Compositionallly I love the prominence of the horses in the foreground, really neat. To my eye the trees in the background don't add much to your shot and I wonder if a tighter crop, bringing the whole image right on those gorgeous racers, might strengthen the shot a bit. (I think you could remove those trees at the top of the image and even the racer in blue in the left.)
Technically I think your image is really good. Your colors are great and the shot looks very sharp (at least to my eye). And your settings captured that action, really nice work. I love all that floating dirt and dust. The image comes off as perhaps a bit dark, like maybe it was underexposed a bit. But the rider's outfits really pop, so added brightness might not improve the shot.
I think this was a solid entry. Well done.