Big Lost River

The Big Lost is shaping up as a solid afternoon destination for the week ahead on pleasant fall days. Flows are dropping as irrigation demands ease, ranging from 108 cfs in the upper section to 253 cfs below Mackay as of September 29, with further decreases expected. Low and frigid water means you'll want to fish midday when things warm, focusing on main stem and deeper runs below Mackay or shallow seams and riffles in the upper reaches once the day gets rolling. A dropping river creates opportunity: consider working heavier line and bigger attractors near the edges as flows settle and fish relocate into newly accessible water.