The Prime Age for Racehorses: Exploring the Triple Crown & 3-Year-Old Performance

Question
Hi--

The most-reknowned American horse races are the triple-crown races for three-year olds.

Is the age of three the prime for a race horse? Put another way: are most track and world records held by three-year-olds.

Many thanks,

Steve
nighttrain@nyc.rr.com

Answer
Hi Steve,
        What a good question. Normally I would have an answer for you but on this occassion, I think I might do a bit more research before answering.
In most well developed racing countries, 3yr olds are a glamour group but I think it is unlikely that they hold more world records than any other age group aside from age group races. I suspect their record beyond 2000m would not be as good as older horses however I will find out and reply to your email address.
Regards,
Don Boddie
roadshow@paradise.net.nz