Tyenna River

River
53.2 km
Main stem
84%
Tree cover on banks
2
Species recorded
A fast, boulder-lined wild-trout river west of Hobart, with bank starts at Maydena, Mount Field and Westerway, low-water nymphing and strict wading decisions.
The Tyenna is a fast wild-trout river within reach of Hobart. It gives you pocket water, short boulder runs and a real chance to alternate between brown and rainbow trout in one day. The fishing is close, physical and better suited to careful coverage than long casts.
Thick banks and a bed of large boulders divide the river into two practical choices. Where the bank is open, you can fish from dry ground and judge the current before committing. In the overgrown water, wading creates the casting room, but only when the river is clear and low enough to show each foothold.
For the simplest first look, choose Mount Field National Park. IFS identifies bank fishing there, and the visitor centre gives you a current place to check park conditions. The tradeoff is clear: carry a valid parks pass, leave bait behind and fish an artificial lure or fly.
Maydena and Westerway are the other bank-fishing starts named by IFS. The ordinary all-method rule applies outside the park, but access across private ground still depends on signs or landholder permission. Begin from dry ground and nymph the nearest pockets before deciding whether to wade.
Summer and autumn usually give the simplest wading. Heavy rain can push colour and extra water through quickly. Check the Newbury flow before driving, and stay on the bank or leave when it rises.
The river may clear quickly. That is not a reason to enter a flow you cannot read.
Bring a four or five weight, studded boots and a staff. Start with a weighted nymph, then switch to a dry only when fish show. The next decision is simple: read the current conditions, choose a legal bank start and fish upstream one pocket at a time.
Target species
No live gauge
There’s no gauge on this water. Check recent trip reports.
Season
Regulations
2
Driving directions

Water and habitat

The Tyenna is a steep freestone river with fast runs and short pockets. Large boulders form slower seams and create the holding water.
Look for the soft edge beside a tongue of current. Check the cushion in front of a rock and the tail before a pocket spills into the next run.
Overgrown banks keep many casts short. They also make a clean back cast unreliable, so a roll cast or compact upstream delivery is more useful than extra line. The steep channel and closed corridor never promise access from either bank.
Heavy rain can raise and colour the river quickly. A falling, clearing flow brings the pocket edges back into play. A rising or opaque flow removes the visual checks you need for safe wading.
BANK COVER ALONG THE RIVER · SATELLITE-CLASSIFIED, 2023–25
Dense trees
Open woodland
Sparse trees
Native grass & tussock
Cultivated

Fish and forage

The Tyenna is managed as a wild-trout fishery dominated by brown trout, with rainbow trout also part of its character. Plan for small to medium fish, while leaving enough tippet strength for a larger trout. The authority’s description is not a catch forecast for a particular day.
Do not lock the day to a hatch calendar. Let the fish decide. If no rise appears, search the boulder pockets with a nymph.
When repeated rises begin in one seam, change to a dry that matches the insects you can see.
Brown Trout
Salmo trutta
Southern Shortfin Eel
Anguilla australis

When to fish it

Summer and autumn are the clearest starting point because lower water opens more of the river to careful wading. Warm afternoons can produce good hatches. That makes the middle of the day worth keeping, especially when the morning starts cool and quiet.
Early in the season or after rain, plan around the nymph. Check the current Newbury conditions before leaving home.
If flow is rising or colour is increasing, change the plan rather than forcing the session. Stop targeting trout whenever released fish are slow to recover.
THE YEAR ON THIS WATER
J
F
M
A
M
J
J
A
S
O
N
D
Early-season nymphing
Fly · Aug–Nov
After rain or while the river still carries colour, work a weighted nymph through the softer edge of each boulder run. Add weight before changing patterns.
Warm-afternoon dries
Fly · Nov–Apr
Watch the slower pockets on a warm afternoon. Start with a size 12 or 14 dry when fish show. Stop targeting trout if released fish recover slowly.
Low-water wading
Flow · Dec–Apr
Summer and autumn usually give the simplest wading. Check the Newbury flow first and stay out when rain has the river rising or coloured.

How to fish it

Use a four or five weight with a leader short enough to control under the overhanging bank. Begin with one size 14 or 16 weighted Pheasant Tail or Hare’s Ear. Keep the line off the faster surface current and lead the fly just enough to stay in touch.
Give each pocket two clean drifts at the visible depth. With no contact, add weight or shorten the line before changing the fly.
In coloured water, move to the inside seam and slow the drift. Do not step into the next pocket until you have fished the water beside your own bank.
When fish rise, remove the nymph and use a size 12 or 14 Elk Hair Caddis or Adams. A short roll cast keeps the fly out of the foliage. If the surface activity stops, return to the weighted nymph instead of casting the dry over empty water.
Carry forceps and a soft net. Wet your hands, keep the trout supported in the current and release it once it holds itself upright.
If fish repeatedly struggle to recover, stop targeting trout. Clean and dry boots, waders and the net before moving to another Tasmanian water.

Access and safety

IFS places most recognised access between Westerway and Maydena and identifies those two towns plus Mount Field National Park as bank-fishing starts. That does not turn every map point into public permission.
Where access is not signed, ask the landowner before crossing. Leave gates as you find them and keep out of paddocks.
Inside Mount Field, check the current park alerts and visitor information before travelling. A valid parks pass is required. Outside the park, signs and current landholder directions decide whether you may enter.
The main hazard is the riverbed. Large boulders are slippery, and extra water can turn a manageable run into a push against your legs.
Wear studded boots and a wading belt, carry a staff and keep one hand free. Turn around when you cannot see the next foothold or when the return crossing looks worse than the one you just made.

Regulations

IFS currently lists specific Tyenna season dates and limits. Use that water listing rather than a statewide default.
Outside Mount Field National Park, bait, lures and flies are permitted. Within the park section, bait is prohibited and only artificial lures and flies may be used.
Before fishing, check the current IFS Tyenna River listing for season dates and limits. Confirm whether you need an inland angling licence, and read the current allowed-method rules. For the park section, also confirm the current pass and alert position with Parks Tasmania.
Permitted with conditions
TAS
On the Tyenna River IFS lists a 220 mm minimum size, a bag limit of five, all methods (bait, lures and flies) permitted, and a 2026-27 season running from 1 August 2026 to 2 May 2027.
Tasmanian Government (Inland Fisheries Service), under the Inland Fisheries Act 1995 and Inland Fisheries Regulations 2019
Read the rule at source ↗
Method restricted
TAS
Where the Tyenna River runs through Mt Field National Park, about a kilometre and a half of it, bait fishing is not permitted and the water is reserved for artificial lures and flies; park entry fees apply and a park pass must be displayed
Tasmanian Government (Inland Fisheries Service), under the Inland Fisheries Act 1995 and Inland Fisheries Regulations 2019
Read the rule at source ↗

Questions

Sources

Tasmania Inland Fisheries Service — stocking, waters directory and location guide pages
Inland Fisheries Service (Tasmania)
Open source ↗
Geofabric v3.x — national stream topology
Bureau of Meteorology
Open source ↗
Bureau of Meteorology — Water Data Online daily-mean values (bound stations)
Bureau of Meteorology
Open source ↗
Geoscience Australia — 1 second SRTM-derived DEM-H v1.0 (NCI tile store)
Geoscience Australia
Open source ↗
DEA Land Cover (Landsat) — Level 4 classification, continental mosaics
Geoscience Australia / Digital Earth Australia
Open source ↗
Geofabric v3.x — national stream network, complete with polyline geometry
Bureau of Meteorology
Open source ↗
Page reviewed 2026-09-20