South Fork Boise River

July 8, 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

There are still a few Salmonflies fluttering around and fish will still look up for them, but if they are refusing, size down.

Conditions

Fishing here is highly variable and hinges on hatch timing; when big bugs are on the water, fish can shut down for 12–24 hours. Water levels remain elevated, making wading difficult, though conditions should improve as summer ends and fall approaches. When you do connect with an active bite, throw big bugs like Chubby Chernobyls, Water Walkers, Dancin Rickys, and Cicadas on top; if fish are refusing, downsize color or profile rather than abandoning dries. On slow days, nymphing or streamers are your best bet. Water temperature is holding at 59 degrees with clear skies and rising barometric pressure.

Gauges

Techniques

  • If you are getting refusals, change up the color or size before you abandon the dry fly game, and always consider hanging a dropper below for fish that are keyed into emergers just under the surface.
  • When you hit it right, be ready to throw big bugs on top. Chubby Chernobyls, Water Walkers, Dancin Rickys, and Cicadas have all been producing.

Recommended flies

#16-20 Flashback Pheasant Tail#18 Olsen's Pheasant Tail#18-20 Silver Duracell#8-10 Knotty Hooker#4 Godspeed Stone Brown#16-18 Red Neck#14-16 Yardley's Low Hole#16-18 Rosa Red Tag Jig#16-18 Rosa Orange#18-20 Burkus Baetis Cripple#16 Rusty Hackle Spinner#18-20 Last Chance Cripple BWO#18-20 Infrequent#10-12 Royal Chubby Chernobyl#8 Purple Chubby Chernobyl#8-10 Fat Albert Tan#10 Fat Head Cicada#8 Elden's Red Ant#10 Dancin Ricky Purple#8 Water Walker Stone Black/Purple

Safety

Wading still difficult due to water levels.

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