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Big Lost River

Fly Fish Food Jimmy's / Big Lost River (Page 2)

Big Lost River, August 2nd, 2023

Flow out of Mackay Dam is reducing, but very high (about 850 cfs) for safe wading. Autumn and late summer are great times to fish this section of the river. We will keep track of flow reduction in order to give you more info on best time to visit. With respect to drainage above the reservoir, Copper Basin in particular, streams have rounded into good shape, but visits from Sun Valley-Ketchum area fly fishers are abundant. Folks from these places have fewer miles to travel via Trail Creek Summit than fly fishers from the Snake River Plain and “yonder.”

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Big Lost River, July 7th, 2023

Flow out of Mackay dam is still close to 1000 cfs. That to high for safe wading. It’s an unusual situation because of run-off coming into the reservoir from above. Water is flowing even down to Arco wher years ago good fishing was possible. This high flow will end soon, and we will report such because this stream and its Copper Basin headwaters are important destinations for many fly fishers.

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Big Lost River, October 18th, 2022

Flow out of Mackay Dam was reduced to 79 cfs a few days ago. This action will concentrate fish in deeper water in the river below and make for easy wading. With nice days remaining until this weekend, now may be a good time to visit the river below the dam and take advantage of trout chasing hatching BWOs and midges and a few remaining hoppers.

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Big Lost River, October 11th, 2022

Flow out of Mackay Dam has been constant at around 180 cfs for at least a week. So wading is relatively easy and water conditions stable. Weather features crisp, cool AMs with some frost and sunny, bright afternoons. BWOs, midges, a few remaining hoppers and other terrestrial insects make top water fishing attractive during afternoons. Certainly presenting traditional nymph patterns and small woolly bugger and rubber leg patterns will be effective any time of day.

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Big Lost River, October 1st, 2022

With flow out of Mackay Dam just below 200 cfs and likely to drop further, the river is a good option for a visit. BWO and midge activities will supply most of the action for feeding trout, so their life cycle patterns are good choices Don’t overlook trying a medium sized woolly bugger type or rubber leg pattern into deeper holes, and on warmer, sunny day try hopper and ant patterns still produce.

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