A dam sets this river's temperature, not the weather, so it can shift several degrees within hours when the release changes. It also warms as it runs away from the dam.
12h(now) — Western Blue-Winged Olive
Peak activity at 11h — Western Blue-Winged Olive (Western Blue-Winged Olive, Peak emergence window)
Hatch predictions
Supporters see the full sub-surface read.
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Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 3 as a supporter.
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Based on species-occurrence records, not local invertebrate surveys.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
- Wyoming licence
- Native fine-spotted cutthroat conservation rules apply — handle and release gently
- Flow tracks the Jackson Lake Dam release.

Terrain map
Native Snake River fine-spotted cutthroat (Oncorhynchus clarkii behnkei) — a distinct, conservation-significant form. Handle gently and release.
The full read · show the working · for Cutthroat Trout · confidence 75%
- Trout 1 April → 31 March
Snake River

A dam sets this river's temperature, not the weather, so it can shift several degrees within hours when the release changes. It also warms as it runs away from the dam.
12h(now) — Western Blue-Winged Olive
Peak activity at 11h — Western Blue-Winged Olive (Western Blue-Winged Olive, Peak emergence window)
Hatch predictions
Supporters see the full sub-surface read.
Start free trial14-day free trial. Cancel anytime.
Beyond the hatch · worth watchingambient prey(1)
Hatch predictions
Top prey shown — see all 3 as a supporter.
Start free trial14-day free trial. Cancel anytime.
Based on species-occurrence records, not local invertebrate surveys.
Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.
- Wyoming licence
- Native fine-spotted cutthroat conservation rules apply — handle and release gently
- Flow tracks the Jackson Lake Dam release.

Terrain map
Native Snake River fine-spotted cutthroat (Oncorhynchus clarkii behnkei) — a distinct, conservation-significant form. Handle gently and release.
The full read · show the working · for Cutthroat Trout · confidence 75%
- Trout 1 April → 31 March