Take her to the store and let HER pick out the rifle.
That's what I'd recommend. She obviously has knowledge about guns, though she may not have hunted much. If that's the case, she may want to buy something that may be great for range use, but too heavy to carry very far, if that's a situation she'll face.
Maybe there are other women she knows who might have hunting rifles she could check out. It would be great if you could take her out to your better hunting areas before you buy a rifle for her. Have her carry a rifle that may be similar to what she may like, like maybe borrowing another woman's rifle who is also skilled at longer-range shots. As you know, unless someone has handled conditions similar to where they will be hunting, it's hard to pick a rifle that would be good for the ranges encountered and easy enough to carry in hunting conditions.
Due to the distances expected, you might consider a .270 Win, 7-08, or similar fairly flat-shooting cartridge, in a rifle that isn't too heavy to carry. A synthetically-stocked, medium weight or fairly light rifle with a 3-9X Leupold scope will set you back about $1,000 for new, but this may be a great time to check out used rifles that are already scoped. It's a great time to buy one now. People are having financial difficulties and gun stores/sporting goods stores should have a great variety of both new and used hunting rifles in stock. If you buy used, be sure to get a 30-day return, no-questions asked guarantee. (For instance, in Maine, it's hard to beat a sporting goods store in Kittery for buying used guns.) You can browse their used-gun listing under Kittery Trading Post to check on prices/used rifles that you may want to look for locally.) If some look pretty good, let her look to see them. It may save you lots of time looking around, when you can call around your area to see if they have what she may be interested in. JP