Use the countdown method
One of the key things you’re trying to do when you’re trout ﬁshing is to ﬁnd the depth at which the ﬁsh are holding. This will change according to the light levels, water temperature, wind levels, and insect hatches, so you’ll need to use the countdown method throughout your day. After you’ve cast your ﬂies, give the line a pull to straighten it out and ensure you’ll feel any takes, and then countdown down for 5, 10, 15, 20, or 25 seconds to allow your ﬂies to sink through the depths. With each consecutive cast, use a slightly longer countdown before you commence your retrieve to help you ﬁnd the depth at which the ﬁsh are holding. Start near the surface and work down. Trout look upwards for food. Start with a ﬁve second count, then try 10, 15, 20, and 25 until you get some action.