Toxic algae blooms or "HABS" are commonly found in various bodies of water in Montana. Identification is tricky and ingesting or breathing contaminated droplets can cause serious health issues in humans and animals.
Ice fishing season is starting to get rolling in Montana. Unfortunately, there are none anywhere near Billings. You'll have to hit the road if you want in on the action. Here's a link to all of the approved 2020 ice fishing tournaments.