One of the thermal inflows - the Boiling River - is the park's largest constant output of thermal discharge. People soak in the Boiling River where it meets the Gardner throughout the winter. Downstream of the Boiling River, the Gardner remains warmer than most YNP streams year round. It makes an especially big difference to anglers at the beginning and end of the park's fishing season, when temps tend to be a bit cold for great fishing elsewhere. Mayflies will hatch from May to November, which makes it a unique experience, not unlike the famous Firehole.
And with sundown on Sunday, the curtains drew nigh on another fishing season in Yellowstone. Here's to a mild but snowy winter and healthy fish next May.