The premier Eastern tailwater for Sulphur hatches — May through August on virtually every wadeable evening. Wild brown trout to 24+ inches and a year-round midge fishery during the winter low-flow window.
Hatch timing varies week to week with water temperature and weather. Cross-reference this calendar with South Holston River Fly Shop or another local fly shop before planning a trip.
Auto-updated based on the current month. For trips today or this week, this is the section that matters.
Daily clouds — primary winter food
Spring emergence
The most prolific Sulphur hatch east of the Mississippi — runs five months
Morning emergence
Bars span the typical emergence window for each hatch on South Holston River. The peak month is outlined and the current month is shaded gold. Mobile users see a month-card view below — a horizontal timeline at 375px is unreadable.
Daily clouds — primary winter food
Spring emergence
The most prolific Sulphur hatch east of the Mississippi — runs five months
Morning emergence
Daily clouds — primary winter food
The most prolific Sulphur hatch east of the Mississippi — runs five months
Morning emergence
Daily clouds — primary winter food
The most prolific Sulphur hatch east of the Mississippi — runs five months
Morning emergence
Morning spinner falls
Daily clouds — primary winter food
The most prolific Sulphur hatch east of the Mississippi — runs five months
Morning emergence
Morning spinner falls
Daily clouds — primary winter food
The most prolific Sulphur hatch east of the Mississippi — runs five months
Morning spinner falls
Fall emergence
Daily clouds — primary winter food
Fall emergence
Daily clouds — primary winter food
Fall emergence
Daily clouds — primary winter food
Daily clouds — primary winter food
Daily clouds — primary winter food
Daily clouds — primary winter food
Spring emergence
Daily clouds — primary winter food
Spring emergence
The most prolific Sulphur hatch east of the Mississippi — runs five months
Tap a species for the full profile — water temp triggers, fly patterns, and which other rivers run this hatch.
Chironomids · Snowflies
Year-round food source — the only consistent option on tailwaters in winter. On cold sunny days look for noses sipping clusters in slow water.
BWO · Olive · Little Olive
Most reliable Eastern hatch. Two emergences — spring (March-April) and fall (September-October). Best on overcast, drizzly days.
Red Quill · Dark Hendrickson
First substantial mayfly hatch on most Eastern rivers. Spinner falls in evening can be as productive as the dun emergence.
Pale Watery · Little Yellow May
The most important mayfly hatch on Eastern rivers. Reliable emergence + spinner fall every evening for 4-6 weeks. Match the spinners with rusty-bodied patterns.
PMD
More reliable on tailwaters where stable temps suit the hatch. Often runs concurrently with Sulphurs but emerges in morning rather than evening.
Spotted Sedge · Cinnamon Caddis
Workhorse summer caddis. Heavy emergences and egg-laying flights at dusk through summer. Drop a soft hackle on the swing during the evening.
Cahill
Pale yellow-cream mayfly. Less intense hatch than Sulphur but reliable across many Eastern rivers in late spring through early summer.
Hoppers · Ants · Beetles
Not a hatch but the most important summer trout food in many Eastern systems. Fish tight to grassy banks and overhanging trees. Hopper-dropper rigs are deadly July through September.
White-Winged Black · Curse
Tiny black-bodied mayfly. The spinner fall — not the dun emergence — is the main event. Look for clouds of spinners over flat water at sunrise.
Calendar entries are flagged "estimated" — regional patterns customized to this river. Always cross-reference with a local fly shop the week of your trip.
Bield: Fish ties USGS gauge data to hatch triggers and alerts you when South Holston Riverhits the temperature window for the hatch you're waiting on. Plan trips around peak emergence, not the calendar.
