Entering the loop from the Upper Terrace parking lot, you can ski in either direction. Starting left is generally considered easier - and leaves all the good views and more interesting features for the end!
One of the largest thermal features and is closest to the trail. Other mineral buildups lie beyond this, but they tower over the trail so you can't get quite the view as with this one.
If you're not a skier, be sure to check out Mineral Hot Springs via the boardwalk trail that follows a short section of the ski track. Even if you skied the loop, this boardwalk is worth taking for a closer view of one of the pools.