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.”