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The Tyenna is 48.1 kilometres in length and is  a tributary of the Derwent River and starts at the back of Mount Field below the Needles at an elevation of 883 meters. It flows in an easterly direction and falls quite quickly until it flows into the Derwent River above Bushy Park. Several smaller waters flow into the Tyenna River adding to its richness and complexity including the Humboldt River, Boyces Creek and Lady Barron Creek.

How to get there

If you travel by from Hobart to to the central highland by the Lyell Highway up the Derwent Valley the Derwent River will be beside or within a couple of kilometres most of the time. At Rosegarland turn toward Glenora where you first come across the Tyenna. The better access starts a little up the road at  Westerway and continues through National Park and up to Maydena.  Quite a lot of the Tyenna is accessible off the road but you may need property owners permission to access the river in some spots.

For detailed maps search Tyenna River Tasmania on Google Earth.

Open season

The majority of rivers in Tasmania including most of the Derwent River are open from 1st Saturday in August to the Sunday closest to the end of April except for those listed as Waters closed or opened for specific periods or waters closed at all times to fishing. For more information go to http://www.ifs.tas.gov.au/ifs/goingfishing/regulations/open-dates-and-times

Services & facilities available

Services are well provided throughout the Derwent Valley and a good service hub for the Tyenna River is Westerway which is pretty central to the accessible water.

Target species

It has perhaps the highest fish population in Tasmania with an estimate of 150 fish per 100 meter stretch of river with  around 40% of that number being above legal size. There are some really big fish in the Tyenna and each year fish over 10 pounds are taken. Most of those are browns but occasionally a sea run trout will venture partly up the river from the Derwent River.The river is open to lure and fly.

Food chain

Normal river nymphs, small native fish and terrestrials prevail.

• What trout eat - central Tasmania

Techniques

Because the type of water can change quickly over a one or two hundred meter stretch of river from say pocket water suited to Czech nymphing to long glides ideal for French lead or swinging fly techniques I apply my "compromise river set up" and carry just one rod, and a selection of leaders set up to allow me to change between four leader tippet set ups in an average time of around just three minutes. That’s a lot quicker and much less stressful than getting out of the water and jogging back to where my second rod is and of course with one set of terminal tackle on my rod when I start and two alternative set up in my fly vest I have traditional fishing up stream, Czech nymphing, longer leader nymphing, across and down, swinging flies, duo and trio, and dry fly fishing all covered.

Fly suggestions

Bead head nymphs
Bead head spiders
Nymphs, spiders, corixia and shrimp
Midge pupa, grubs and snails
Streamers & pulling flies
Hoppers, locust & crickets
Emergers
My favourite buggers

Hot spots

Virtually the whole system is fishable, but above Maydena it is more overgrown and the going is harder. Try the tributaries as well, but the fish are generally smaller but still good fun.

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