I started riding when I was 7, started jumping when I was 7 :P
I was 9 when I did my first competition (I think), that was a 1ft 6'' SJ class on a pony called Barney and I also rode a pony called Peanut :)
Now I do SJ competitions and want to do country shows (but haven't yet). I want to go on to compete for my university.
I started riding at 4, I started jumping around 8 or 9. I ridden all the way until I was 17 competing in some rated hunter shows, some schooling shows and some jumper shows. Then from the age of 17 to 24 I stopped riding because I just wasn't into it anymore.
I just got back into riding about 6 months ago, I got a great opportunity to train horses for one of my trainers that I knew when I was younger. I'm very glad that this came along. If not then I don't think I would be have ever ridden again. I did one show so far, I'm not to into the show scene that much anymore. Also the horse I'm training made a lot of progress which I'm proud of.