I thought about this thread the other day while fishing. I’ve fished for wild trout in the Laurel Highlands for over 30 years and typically stay on the headwater streams. However, on Friday I was lazy and fished an easy-access downstream section of one of my blue lines. It receives one light stocking of rainbows in May and I saw about a dozen in a single pool. In addition to the wild brook trout I was targeting, I caught three wild rainbows in what appears to be 3 age classes:
I was very surprised as I know this watershed well and have fished all of its tributaries that have public access. I catch wild browns on a few, but never wild rainbows and haven’t heard of any being caught.
Checking my journal, I’ve caught 50+ wild rainbows on nine Laurel Highlands streams since 1990. Most are now on the PAF&B wild trout list, but a few aren’t. Two of those streams support wild brooks, browns and a few rainbows—I caught a wild trifecta on one of these in 1998.
Wild rainbows in the well-known Laughlintown area streams in Westmoreland County’s Loyalhanna watershed are apparently descended from west coast-sourced wild fish. Those being stocked in the early part of the last century by the Rolling Rock Club.
I don’t know, but assume the wild rainbows I’ve caught outside of the Loyalhanna watershed are from successful spawning by PAF&B Commission hatchery fish. While searching for information on wild rainbows in the state, I found the commissions “Overview of Trout Stocking in Pennsylvania” (
TroutStocking-FactSheet.pdf (fishandboat.com)), which mentions “An additional benefit to stocking Rainbow Trout is that there are rarely concerns of them reproducing and establishing wild populations, especially in watersheds where they could compete with wild Brook Trout.” Maybe in some areas, but apparently not in the Laurel Highlands.
I have a large inventory of Southwestern Pennsylvania streams with wild trout that I fish. I rarely visit a stream more than once per year and many I fish infrequently. One of the later, an unstocked stream had a good population of wild browns when I fished there several times in the 1990s. In year 2000, I caught 6 browns and a single wild rainbow there. Returning in 2014, I caught 6 browns and 3 rainbows—the later in 3 age classes. I’m planning to return before winter and I’m expecting an expanded population of rainbows.