Normal
39d ago
Tricos mixed with Baetis hatching as day warms up, and giant crane flies skittered across the surface
Conditions
The Big Lost will be running low and clear through the first week of September, with flows expected to remain in the low range. Tricos and Baetis will be the staple hatches as the day warms, mixed with sporadic small caddis activity. Giant crane flies are worth trying skittered across the surface, and nymphing small Baetis and midge patterns stays productive even when afternoon bug activity slows. Fishing will be best from midday into late afternoon when the water warms enough to trigger activity, though cooler temperatures may trigger a Hecuba hatch as well.
Gauges
Live cameras
Big Lost River below Inlet Diversion near Arco
USGS 13132520 · Oct 12, 2026, 5:00 PM
Every 60 min · daylight
Big Lost River near Arco
USGS 13132500 · Oct 12, 2026, 5:00 PM
Every 60 min · daylight
Big Lost River near Leslie
USGS 13130300 · Oct 12, 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
- Fishing is best from the middle of the day into the late afternoon
- In the afternoon, bug activity slows but nymphing is still productive with small Baetis or midge patterns