more horses Horses at Mommouth Park Race Track

Hello all,

This is my very first Horse Race track that I shot, and to my surprise, since I've never been to a racetrack, the race went way too fast than I was prepared for.

Please advise on how I could have improved in my ability to be a good developing photographer. I know that I probably needed a longer lens than my 100mm lens on my Digital Rebel XT. Any other advice?

Thanks.

Jake The Snake