River Conditions
Flows out of Palisades Dam are holding steady at 13,000 cfs, and clarity is excellent right now. Things are stable heading into the weekend — no significant changes expected on the horizon.
The Word From Our Guides
The South Fork has been fishing very well this week, and the crew has been having a great time out there. It’s still primarily a nymph game, but one thing that’s standing out this year compared to previous seasons: the fish are keying more on smaller nymphs than usual. In past years, rubber legs and worms were often the go-to producers at this flow and time of year — and they’re still catching fish — but we’re seeing more consistent action on smaller, more refined patterns. That’s a noteworthy shift worth having in your box.
The other thing worth mentioning: the fish are big this year. We’re talking legitimately big. Fish up to 30 inches have already been landed on the South Fork this spring, and 24-inch-and-above fish have been noticeably more common than in past years. The working theory is that the rainbow reduction efforts — carried out by Idaho Fish & Game, the public, and a number of guides — are freeing up more food for the fish that remain in the system, and those fish are responding by growing larger. If that holds, we could be looking at one of the best summers of fly fishing the South Fork has ever seen, with some of the biggest fish this river has produced in recent memory.
Tactics: Go Small, and Watch the Calendar
Your most productive nymph setups right now will feature smaller offerings — think Perdigons, jig-style Euro nymphs, and Pheasant Tail Nymphs all with tungsten bead heads to get down in the current. Don’t overlook egg patterns either; the Blob remains a reliable producer. Streamer fishing is always an option on the South Fork and can be a great change of pace, especially for anglers looking to move bigger fish.
Now’s also the time to start thinking ahead. Salmon flies are tracking early this year — hatches on the Henry’s Fork have come off several weeks ahead of schedule, which suggests we could see salmon flies on the South Fork sooner than normal. That said, we’re still at least 7–10 days out. As we get closer, expect the fish to start looking up for big stonefly nymphs. Double up your Pat’s Rubber Legs and have sizes 4 and 6 ready — the fish will be loading up on them ahead of the hatch.
Weekend Outlook
Weather looks perfect heading into the weekend — about as good as it gets for a late spring day on the South Fork. With stable flows and excellent clarity, it’s a great time to be on the water.
At the Fly Shop & Lodge
Stop by the Swan Valley Fly Shop to get dialed in before you head out — we’ve got the nymphs, stones, and streamers you need for what’s fishing right now, and the crew can point you in the right direction. Give us a call at 208.483.2727 or shop anytime at tlapcflyshop.com.
Ready to book a guided trip? Call the lodge at 208.483.2222 — it’s a great time to get on the water before the salmon fly circus kicks off.
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