No flow
67d ago
Morning Tricos and Baetis, large craneflies still skittering about
Conditions
The Big Lost is running low through mid-August, with flows at 416 cfs on the lower sections as of the report date. Trout are educated and selective, demanding fine tippets and precise presentations. Expect Tricos and Baetis in the mornings, with large craneflies skittering about and hoppers producing throughout the day. Cold morning temperatures in the 30s push the better fishing window to mid-morning through afternoon, so plan your timing around the warming trend.
Gauges
Live cameras
Big Lost River below Inlet Diversion near Arco
USGS 13132520 · Oct 18, 2026, 5:00 PM
Every 60 min · daylight
Big Lost River near Arco
USGS 13132500 · Oct 18, 2026, 5:00 PM
Every 60 min · daylight
Big Lost River near Leslie
USGS 13130300 · Oct 18, 2026, 5:00 PM
Every 60 min · 247
Big Lost River bl Mackay Res nr Mackay
Last updatedUSGS 13127000 · Nov 7, 2025, 10:00 AM
Every 60 min · 247
Techniques
- Hoppers turning fish when searching water; smaller, more imitative caddis and mayfly patterns working on selective feeders
- Better fishing shifted to mid-morning into afternoon due to cold morning temps
- Trout are well seasoned and selective; fine tippets and precise presentations are key to success