South Fork Boise River

August 13, 2026

South Fork Boise River

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

Water Temp

59°F · Prime temp

Observed

7d ago

Hatch Status

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

Conditions

The South Fork has dropped to 1200 cfs with rocks now exposed, offering crystal clear, cold water at 59°F as of August 26—ideal conditions for active feeding. Afternoon pinks and evening caddis are on, making this a solid time to target rising fish. Big buggy dries with dropper rigs or bullets underneath work well in these conditions. This tailwater below Anderson Ranch Dam delivers more predictable summer fishing than the mainstem.

Gauges

Techniques

  • Throughout the remainder of the day, both through the morning and in the late evening, big, buggy dries with a dropper or two underneath have been effective.

Recommended flies

Big buggy dries with dropper or two underneathBullets as droppers

This report covers one day. See today’s bite forecast for South Fork Boise River.