Do not bury or burn entrails, as they will attract bears. The Middle Fork of the Flathead River is outside of the park, and a Montana State fishing license is required. When fishing from the park lands along the North Fork of the Flathead River, park catch and possession limits, as well as other park fishing regulations are applicable, with the exception of the state regulations pertaining to cutthroat trout. Hidden Lake and outlet creek during cutthroat trout spawning. The success of a fisherman depends on skill, lures used, weather conditions, time of year, whether a boat is used or not, and the body of water fished.
Fish usually feed in the early morning and evening.
Fish are on the bottom when the water is high and murky. During this time they feed on materials dislodged from the bottom. Lures that imitate insect larvae are most successful. Later in the season, when streams are clear, flies are better. The best fly fishing is when a fisherman can match a local insect hatch.