"I'll throw in my 2 cents as well: as an avid horseman for 30+ years and a kilty for a few less, just say no to kilted riding. In fact I do not wear jeans when riding. I have found that sweats with as few seams as possible are the best riding pants. The double folded seems on most jeans can cause welts and raw spots on tender portions of your anatomy. Sweats are cheap, easy to clean or discard, cause little chaffing or welts."
This is an excellent suggestion. If I may add, wear a good substantial pair of boots are perhaps hiking boots. Definitely no sneakers.
Judging from the response to this question do we need an equestrian forum?