How to use this guide
The South Holston (“SHO”) is a TVA tailwater below South Holston Dam near Bristol, Tennessee. This guide was checked in late 2026 against the Tennessee Wildlife Resources Agency (TWRA) trout regulations pages, TWRA's 2026-27 Fishing, Hunting & Trapping Guide, TVA's South Holston lake-levels and recreation pages, and USGS gauge records. TWRA and TVA both post updates that can override what is printed here — check tn.gov/twra and tva.com before every trip.
The River at a Glance
The South Holston tailwater begins at TVA's South Holston Dam, a flood-control and hydropower project on the South Fork Holston River completed in 1950, and runs roughly 14–16 miles downstream through Sullivan County to Boone Lake near Bristol, Tennessee. Because releases are drawn from deep, cold water behind the dam, the tailwater stays cold year-round, which is why the river supports a trophy wild brown trout fishery and TWRA-stocked rainbows in a part of the country where most streams run too warm for trout in summer. About 1.5 miles below the dam, TVA built an aerating labyrinth weir in 1991 as part of its Lake Improvement Plan. TVA explains the weir raises dissolved-oxygen levels in turbine discharge and sustains minimum flow between generation periods — both benefits for trout and aquatic insects, and the reason the weir pool is one of the river's most consistently productive reaches. Fish. Wild brown trout reproduce naturally in the tailwater; TWRA also stocks rainbow trout. Smallmouth bass and other warmwater species are present farther downstream toward Boone Lake.
Why it fishes differently from other tailwaters. The South Holston's claim to fame is a Sulphur mayfly (Ephemerella invaria/dorothea) hatch that emerges on most days of the year because the tailwater stays in a narrow temperature band. Hook sizes commonly fished shift through the season — larger early and late in the year, smaller in summer — but this pattern is angler-reported, not an agency dataset.
TWRA Rules & the Spawning Closure
Source: TWRA's 2026–27 Tennessee Hunting, Fishing & Trapping Guide (Trout Regulations, pp. 35–37), effective Aug. 1, 2026 – Jul. 31, 2027, and tn.gov/twra/fishing-regs/trout-regulations.html. Summarized in our own words; read the official guide for exact wording, and check for in-season proclamation changes before you fish.
South Holston–specific protected length range
| Rule | South Fork Holston River, South Holston Dam to Boone Dam (incl. Boone Reservoir upstream to the Hwy. 11E bridge) |
|---|---|
| Protected length range (slot), all trout | 16–22 inches — fish in this range may not be harvested |
| Daily creel, any combination of trout | 7 fish |
| Harvest over the slot | Only 1 of the 7 fish may be longer than 22 inches |
| Lake trout | No more than 2 of the 7 may be lake trout (not generally present on the SHO) |
This 16–22" protected length range and the one-over-22" rule are specific to this reach of the South Fork Holston — they are stricter than the statewide trout rule (7/day, no minimum length) printed elsewhere in the TWRA guide for waters without a listed exception. Measure fish before deciding to harvest; the official guide is the final word if anything here is unclear.
Winter closures (Nov. 1–Jan. 31)
TWRA's 2026–27 guide lists two reaches of the South Fork Holston closed to all fishing from Nov. 1 through Jan. 31 each year:
- Hickory Tree Bridge upstream to the confluence with Bottom Creek.
- The downstream point of Boy's Island (the first island downstream of the Weaver Pike bridge) upstream to the top of the first island above the Webb Road bridge.
These closures protect spawning trout. Boundaries are set by the state proclamation, not by TVA signage alone — confirm current language at tn.gov/twra/fishing-regs/trout-regulations.html before fishing the upper river in winter.
Other rules worth knowing
- A valid Tennessee fishing license with trout privileges is required for anglers 13 and older (see Section 8).
- Artificial lures, flies and bait are all legal on the South Holston under this section's rules — TWRA has not listed it as a delayed-harvest, artificial-only water.
- TWRA's statewide rule: fish altered so species or length cannot be determined may not be possessed while afield.
- Snagging is prohibited year-round on the South Holston tailwater, from South Holston Dam to the Highway 390 bridge at Bluff City.
- Wading and fishing below the dam and weir carries real risk from sudden water releases — see Section 3 and Safety.
TVA Generation Schedule & the Weir Dam
The South Holston only wades safely when TVA's South Holston Dam is not generating. TVA posts a day-ahead hourly generation schedule and real-time elevation/discharge data for the project at tva.com/environment/lake-levels/south-holston — the single most useful planning tool for this river.
How to read it
- TVA's schedule lists each day broken into hourly blocks showing the number of generating units running (0 means no generation, higher numbers mean more flow).
- Hours showing “0” generators are typically the wadable windows; hours with 1 or more generators mean rising, often fast-moving and cold water.
- TVA's observed-data table (tailwater elevation and average hourly discharge) lets you see how quickly the river rose or fell on recent days — useful for judging how much warning you'll get.
- The schedule “can change without notice due to unanticipated weather changes or power system requirements,” per TVA's own warning on the page. Treat the posted schedule as guidance, not a guarantee.
- Call TVA's recorded lake-and-flow line or check the website again shortly before you leave and again streamside.
The weir dam
About 1.5 miles below the dam, TVA's aerating labyrinth weir (built in 1991) re-oxygenates turbine discharge and keeps a minimum flow moving between generation periods, which both protects aquatic life and gives anglers a buffer of slower-rising water around the weir pool compared with the mile of river directly below the dam.
Never wade based on the current water level alone. Releases can start with little warning upstream of where you're standing. Always know the day's generation schedule and watch for rising, discoloring water and horns/sirens where posted.
Flows & USGS Gauges
Two USGS gauges bracket the fishable tailwater.
| USGS site | Where |
|---|---|
| 03476500 — South Fork Holston River below South Holston Dam, TN | Immediately below the dam; reflects releases first. |
| 03477000 — South Fork Holston River at Bluff City, TN | Lower end of the tailwater near Bluff City; integrates the whole reach. |
USGS data are provisional and may be revised; cross-check against TVA's own observed-data table for the same day.
Practical notes
- A rising hourly discharge reading at either gauge generally means a generating unit has come online — get out of the river channel.
- The weir dampens surges somewhat but does not eliminate them; treat any sustained rise as real.
- This guide does not give a single “safe” cfs number. Your safety depends on where you are standing, your footing, and current conditions — judge it yourself, conservatively.
Access Points by River Mile
Access points and approximate river miles below South Holston Dam, per TVA's South Holston recreation/paddling map (tva.com). River mile (RM) counts down from the dam.
| Access point | Approx. river mile | Notes |
|---|---|---|
| South Holston Dam / Emmett Bridge | RM 48.5 | Uppermost access point below the dam. |
| Osceola Island Recreation Area | RM 48 | TVA day-use area with boat ramp and walking trails; popular wade water. |
| TVA Walk-In Access | RM 47 | Bank access near the weir dam reach. |
| Big Springs Road | RM 41.8 | Mid-river wade and float access. |
| J. Forrest Thompson access | RM 37 | Lower-middle river access. |
| Bluff City Park | RM 34.5 | Lower end of the tailwater, near the Bluff City USGS gauge. |
General access notes
- Most formal access points sit on TVA public land; respect posted boundaries where the river corridor runs through private property between those points.
- Boat ramps at Osceola Island and elsewhere serve drift boats and small craft for float trips between wadable reaches; floating is also how most of the middle river is reached outside the mapped access points.
- South Holston River Lodge and several area outfitters/guide services operate on this stretch and can arrange drop-off floats that cover more water than bank access alone.
- Always check the TVA generation schedule (Section 3) before committing to a float — rising water changes a wade-friendly run into a serious hazard quickly.
Approximate Food & Hatch Chart
The chart below is approximate. No state or federal agency publishes an official South Holston hatch chart; these windows summarize commonly reported fly-shop and angler observations for this tailwater and vary year to year with weather and generation. Treat them as a starting point, not a guarantee.
| Insect | Approx. window | Typical sizes | Notes |
|---|---|---|---|
| Sulphur (Ephemerella spp.) | Reported on most days, year-round; heaviest emergence May–Jul | #16 early/late season to #20+ in late fall | The SHO's signature hatch; size commonly fished shrinks through the season per angler reports. |
| Midge | Year-round, most reliable Nov–Feb | #20–26 | Primary winter dry-fly and emerger option. |
| Blue-winged olive (BWO) | Mar–May and Sep–Nov | #18–22 | Best on overcast, cooler days. |
| Caddis | Apr–Jun | #14–18 | Evening activity in warmer months. |
| Isonychia | Jun–Sep | #10–14 | Larger summer mayfly; fished as nymph and swung wet. |
| Trico | Aug–Oct mornings | #20–24 | Early-morning spinner falls in late summer. |
Remember: this is a tailwater — cold releases can suppress or trigger hatch activity on short notice. Check a local fly shop report before you plan a trip around a specific hatch.
The Fly Box & Rigging
A starter box built around the South Holston's defining Sulphur hatch and its winter midge game.
| Fly | Imitates | Sizes | How to fish it |
|---|---|---|---|
| Sulphur emerger / cripple | Emerging Sulphur dun | #16–20 | Dead-drift in the film; the standard SHO Sulphur play is emergers, not full duns. |
| Sulphur dun (Comparadun/parachute) | Adult Sulphur | #16–20 | During visible duns on the surface. |
| Pheasant Tail nymph | Mayfly nymph (Sulphur, BWO) | #16–20 | General searching nymph, often under an indicator. |
| Zebra midge | Midge larva/pupa | #20–26 | Dropper in slow runs and the weir pool, especially winter. |
| Griffith's Gnat | Midge cluster | #20–24 | Calm, flat winter water. |
| Elk Hair Caddis | Adult caddis | #14–18 | Evening risers, spring and summer. |
| Isonychia nymph / soft hackle | Isonychia nymph | #10–14 | Swing through riffles, summer. |
| Small streamer (Woolly Bugger, sculpin pattern) | Baitfish / sculpin | #6–10 | Stained or higher water after generation. |
Suggested rigging
- Rod: a 9-foot 5-weight is standard; some anglers prefer a softer 4-weight for long leaders and small dries.
- Leader: long leaders (12 feet or more) tapered to 5X–6X are the norm for the SHO's flat, clear water and selective trout.
- Polarized sunglasses and a stealthy approach matter as much as fly choice on this heavily fished, technical tailwater.
- Always know the generation schedule before wading (Section 3) — rig and fish with an exit route in mind.
Catch-and-release. Keep fish in the water, wet your hands, and revive facing into the current before release. There is no state-mandated catch-and-release rule here, but the fishery's wild-brown-trout population depends heavily on angler practice.
Licenses & Fees
Source: Tennessee Wildlife Resources Agency license and fee pages (tn.gov/twra/license-sales.html) and the Tennessee Comprehensive Rules and Regulations, Chapter 1660-01-28 (license and permit fees), current for the 2026 license year. Fees are set by the Tennessee Fish and Wildlife Commission and can change — verify at gooutdoorstennessee.com before buying.
| License | Approx. fee (2026) |
|---|---|
| Resident Combination Hunting & Fishing License (does not include trout) | $33 |
| Resident trout supplement/permit, added to a base license | ~$21 (brings resident trout fishing to roughly $54 total) |
| Resident Sportsman License (all-species annual, includes trout and most hunting) | $165 |
| Nonresident Annual Fishing License — All Species (includes trout) | $98 |
| Nonresident Annual Fishing License — Except Trout | $49 |
| Nonresident 3-Day Fishing License — All Species | $40 |
| Nonresident 10-Day Fishing License — All Species | $61 |
Tennessee does not sell a separate stand-alone nonresident trout license. Per TWRA, nonresidents who want to fish for trout must buy the all-species license; if you buy the no-trout license and later decide to fish for trout, TWRA requires you to upgrade to the full all-species license with no discount for what you already paid.
Anyone 13 or older needs a valid license to fish in Tennessee; TWRA lists exemptions for children 12 and under and for Tennessee's annual Free Fishing Day. Buy and manage licenses at gooutdoorstennessee.com.
Safety
Fly fishing a generation-driven tailwater involves real risks. These are general precautions, not a guarantee of safety.
- Sudden releases. TVA can start generating with little warning. Know the day's schedule (Section 3), watch the water, and have an exit route planned at all times.
- Cold water. Bottom-release water runs cold year-round; hypothermia is a real risk even in summer if you're wet for long.
- Wading near the dam and weir. The uppermost mile below the dam and the weir pool see the fastest changes in flow — use extra caution there.
- Slick rock and uneven bottom. Studded boots and a wading staff help on this freestone-like streambed.
- Weather. Leave the water if a thunderstorm approaches — a graphite rod conducts electricity.
- Emergencies. Call 911. Cell coverage is generally available near Bristol but can be patchy along the river corridor.
Sources & Disclaimer
- Tennessee Wildlife Resources Agency: Tennessee Trout Regulations page (tn.gov/twra/fishing-regs/trout-regulations.html); 2026-27 Tennessee Fishing, Hunting & Trapping Guide; license and fee pages (tn.gov/twra/license-sales.html).
- Tennessee Comprehensive Rules and Regulations, Chapter 1660-01-28 (Resident and Non-Resident License and Permit Fees).
- Tennessee Valley Authority: South Holston lake-levels and generation-schedule page (tva.com/environment/lake-levels/south-holston); South Holston recreation/access and paddling map; “Weir Science” history article on the aerating labyrinth weir (tva.com).
- U.S. Geological Survey: site records for gauges 03476500 (below South Holston Dam) and 03477000 (at Bluff City, TN).
- Hatch and fly information reflects commonly reported angler and fly-shop patterns and is presented as approximate guidance, not agency data.
Disclaimer
This guide is provided for general information. It was checked against the sources above in late 2026, and we work to keep it accurate, but errors can occur, and regulations, fees, generation schedules, access and river conditions change without notice. Always confirm current rules with the Tennessee Wildlife Resources Agency and current release schedules with TVA, respect private property and posted signs, and never wade or float water you have not confirmed is safe. Fly fishing and wading involve inherent risks; your safety is your own responsibility. LearningToFlyFish.com is not affiliated with TWRA or TVA.
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