Fly Fishing Flat Creek - Below Cache Creek (Jackson)

Fly fishing Flat Creek below Cache Creek takes place right in the town of Jackson, yet still offers the chance to catch native cutthroat in a small-stream setting. Once Flat Creek is joined by Cache Creek in east Jackson, it gains a bit more flow and winds through town before meeting the Snake River south of Jackson. This lower section flows through a mix of urban and pasture environments and is subject to irrigation, so summer flows can run low (10–30 CFS) and warm. Still, pockets of cold spring influx and shade harbor Snake River cutthroat trout that find their way up from the Snake or reside year-round, though typically in modest sizes (6–12 inches). Access is easy via the Jackson bike paths and city parks – Karns Meadow and May Park are two areas where anglers can legally fish Flat Creek in town. The setting includes bridges, tall grasses, and occasionally a curious onlooker or two, but the trout behave like wild fish anywhere. Terrestrial fly patterns are particularly effective in the late summer here; the trout are accustomed to ants and hoppers tumbling off the banks. A stealthy approach is still needed despite the urban surroundings – these fish can see movement easily in the shallow water. Using a light 3-weight rod and a short cast, an angler might drop a parachute ant in a likely run between clumps of grass and be rewarded with a sudden splashy take from a hungry cutthroat. While there are fewer hatches of note compared to upstream (owing to some temperature elevation), midges and small mayflies do appear in morning hours and trout will sip them in slower pools near dawn or dusk. Many anglers opt to fish this section in spring (before the season closes for spawn) when water is cooler, or in early fall after irrigation season ends and flows stabilize. Because this is a smaller fishery, it's ideal for a quick after-work session or introducing a beginner to fly fishing – eager little cutthroats will often attack a dry fly in the quiet of a Jackson evening. Flat Creek below Cache Creek is a reminder that even in a bustling mountain town, wild trout can be found. It's a unique feeling to hook a native cutthroat with the silhouette of Snow King Mountain in the background and the sounds of Jackson nearby. While it may not boast the lunkers of bigger waters, this stretch provides accessible, enjoyable fly fishing and a taste of the Snake River's native trout legacy right in town. Anglers should practice good etiquette (mind private property boundaries and city regulations) and gentle catch-and-release to maintain this urban fishery for others. In sum, it's a convenient and charming option when you can't stray far from Jackson but still have the itch to cast a fly.