For the tall plus size gal, look for tall length pants. (40plusstyle.com)
I'd noticed the Ann Taylor pants with the blue stripe earlier, but they don't come in tall lengths. (youlookfab.com)
Their house brand comes in short / petite, average & tall lengths with a pretty good range of sizes in all 3, and is designed to accommodate hiking boots so a straight - to - small flare cut. (corporette.com)