Big Lost River

Outlook · Aug 19–26

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Big Lost River

Current conditions for Big Lost River · Map, access and gauges

Flow

No flow

Observed

14d ago

Hatch Status

Still a decent morning Trico hatch mixed with some Baetis.

Conditions

Flows are running low and stable around 321–350 cfs as the reservoir begins to turn over with dropping air temperatures. Expect temporary discoloration in the water as sediment settles, but clarity should return by mid-week. The North Fork is running muddy from recent rain, so focus on the main stem. Morning Trico and Baetis hatches will drive early fishing; expect it to slow once the bugs clear and the day warms. Nymphing produces consistent fish throughout, and terrestrials like hoppers and spruce moths remain effective as afternoon conditions develop.

Gauges

Live cameras

Techniques

  • In afternoon, fishing can slow down considerably once hatch is done, but nymphing will produce fish.
  • No need to start too early as morning temps have been chilly. As day warms, find a few Tricos and mix of other small mayflies, craneflies, and midge.

Recommended flies

PMDs size 16Yellow SalliesCrane FliesGolden StonesBaetis 18-20Midge 20-24CaddisSpruce MothsHoppersStreamers

Access

North Fork is muddy from recent rain; main stem is the better choice for the coming week.