Reddit reviews Hot Springs of Western Canada: A Complete Guide : Also Includes Some Hot Springs in Washington and Alaska

There are zero natural hot spring locations that you can comfortably day-trip from Calgary.

Alberta does not have much in the way of hot springs. There are the couple around Banff, none of which have much water, and none in which you can soak, and there's the Mist Mountain warm spring, which has a wee tiny pool-ish.

The Rocky Mountain geology is simply not conducive to the formation of hot springs. You need to go further, into the Columbia, Kootenay, and Purcell for that.
Cross into BC, and it's hotsprings everywhere. You have your classic Radium, Ainsworth and such pool facilities, a few middle-ground like Lussier Hot Springs which are semi-built, but not turned into a swimming pool, and piles of even more obscure ones with varying amounts of build-up, some of which you must hike to.
Pick up Hot Springs of Western Canada from MEC or the public library for a solid overview.

I don't know the ones up north well I am just speaking about ones I have visited personally. I have this book and it does list quite a few up north.

There are a few in and around Nakusp. It's worth picking up this book for some hidden gems!
I found a 1976 version at a book store in Kelowna a decade or so ago, and spent a couple summers hunting them down. It's a great book, and there are some wicked spots around!
Good luck.