Guests of the Fairmont who use the pool or brand new fitness center are able to use the Spa locker rooms, although you don't get access to the fancier slippers or fluffy robe that guests who've ponied up for spa treatments do. Still, you have a warm, dry place to store your belongings and retreat to for warmth post-swim.
The pool was first described to us as an 'indoor/outdoor pool,' however the indoor portion is small. It's where you can make your tentative entry into the pool, comforted by the fact that you are still inside. Then, it's off through the door and out into the great, cold wilderness...
Swimming in winter feels invigorating and kind of like you're cheating the system somehow. (Suck it, weather! I'm swimming anyway!) It definitely felt cold when we stood up but if we kept our shoulders under the water and swam or bobbed around, we were totally warm enough--and entranced by the mountain views.
Fairmont Jasper is a family-friendly hotel so expect some kids, or even loved-up honeymooners, to be sharing the pool with you.
There's no hot tub right now, but a brand new one is being installed this year and expected to be open by the summer. In the meantime, you can get warm inside the saunas or eucalyptus-infused steamrooms found in both the men's and women's locker rooms.
Disclosure: We stayed at Fairmont Jasper Park Lodge as a guest of the hotel but all opinions are entirely our own.