The most productive areas in streams of this type are the transitional zones between riffles and pools, where trout hold in the current seam to intercept drifting invertebrates. Undercut banks, areas of submerged woody debris, and the tails of pools are reliable holding lies for larger brown trout. Where the stream gradient eases and pools deepen, these areas are worth targeting for both trout and any salmon that have moved upstream. Young-of-year trout and parr are typically found in shallower, faster riffle sections, while older, larger fish occupy the more sheltered pool and run habitat.