Fly Fishing Flat Creek - Above Cache Creek (Jackson Hole)

Fly fishing Flat Creek above Cache Creek means stalking wary native cutthroat trout in a classic meadow spring creek on the National Elk Refuge. Flat Creek, which flows through Jackson Hole, is a slow, meandering spring creek characterized by undercut banks, clear water, and abundant aquatic vegetation. The stretch above the Cache Creek confluence (essentially the upper portion that runs through the Elk Refuge) is managed as a special-regulations water: it opens to fishing August 1 (after cutthroat spawning) and offers challenging, rewarding sight-fishing for Snake River fine-spotted Cutthroat Trout. Flows are low and steady, often around 10–20 CFS in late summer, making stealth and presentation paramount – these trout have ample time to inspect your fly in the placid currents. Anglers access Flat Creek via the Elk Refuge Road just outside Jackson. Upon arrival, you'll often spot cutthroat trout noses poking through the surface film, feeding on tiny tricos or midges. Hatches on Flat Creek can be prolific in early August: Trico mayfly spinner falls in the morning create a blanket of tiny bugs, and the cutthroat sip them delicately – testing an angler's patience and 6x tippet skills. Terrestrials are the name of the game by afternoon; beetles, ants, and grasshoppers blown from the refuge meadows bring opportunistic strikes from beneath undercuts. A favorite tactic is to drift a small foam beetle tight to the grass edges and watch for a subtle dimple as a cutthroat sucks it in. Nymphing is less common (to avoid spooking fish in clear shallow water), but a well-placed damselfly nymph or scud can fool fish holding near the bottom weeds. Flat Creek's setting is sublime – the panorama of the Grand Tetons looms to the northwest, and frequently herds of elk or bison can be seen in the distance on the refuge. The creek itself demands a spring creek skill set: long leaders, a cautious approach (often crouching or casting from your knees), and accurate casting are required to consistently fool fish. Trout here average a solid 14–16 inches here, with some pushing 20 inches – trophy-sized for such technical water. Anglers talk in hushed tones as they move along the banks, careful not to send ripples or shadows across the creek. For those who enjoy matching wits with educated trout, Flat Creek is the ultimate Jackson Hole fly fishing challenge, offering cerebral angling and the chance to land a beautiful native cutthroat in an equally beautiful setting.