I have done a total of one race and the end of last season. I liked it. I'm going to do more. I just turned 35, not a month ago, alot of the races I see combine cat 4/5 and have a cat 4/5 masters.

Which is a better category and why. That's all really. Thanks.

Best to do 10-15 of cat5's and reson is b/ct he masters tend to have a lot of experienced people who may not b as fast as you are now, but are very good in saving their energy and have lots of experience .same with 4/5 lot of experienced racerz a ) .doing about 10of the cat 5will give you a goodrace speed agility and will allowo) you to learn a lot of techniques and then when you go for the 4/5's you will have a much easier time and most likely will get good top 10placing b/c you will b wi fresher legs ,have that race speed in yuou and experienced many situationns that gave you insight to position well and race smart in order to win in the present races...

Preference in order: cat 5, cat 4/5 masters, cat 4/5

masters have generally been riding longer, even the cat 5 ones, so their fields are less squirrely.