Klim offers a woman's offroad pant that is on par with their men's Dakar pants. They're even offering these in size US 2-16 and tall sizes! The fit is great for anything upright, and there is plenty of room in the knees for knee guards and external body armor. There are also pockets to add armor inserts but since they're designed mainly as an offroad pant, armor isn't included. They're very hip friendly and generous across the thighs/butt.
Unfortunately they're not waterproof but that's where the Altitude would come in handy.