South Fork Boise River

August 14, 2026

By Barbless, compiled each morning from the gauges, forecasts and sources on this page.

South Fork Boise River

Current conditions for South Fork Boise River · Map, access and gauges

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Water Temp

54°F · Prime temp

Observed

44d ago

Hatch Status

Pinks are still coming off in the afternoons, with Caddis following directly after in the evening.

Conditions

Crystal clear water and 54°F temperatures make the tailwater below Anderson Dam prime for sight fishing in early September. Flows have dropped to around 1,200 cfs with exposed rocks, so floaters should be mindful of the lower water level. Pinks show in the afternoon with Caddis following in the evening, buggy dries with dropper rigs can be effective throughout the morning and late-evening window.

Gauges

Techniques

  • Buggy dries, Pinks, and Caddis. Bullets as droppers.
  • Big, buggy dries with a dropper or two underneath have been effective throughout the remainder of the day, morning and late evening.

Recommended flies

PinksCaddisBuggy dries with dropperBullets as droppers