Blue Stream Fly Fishing
Fly Fishing Report for:

South Fork Snake River - Lorenzo - Idaho

Hatch Chart - Best Access/Spots - Local Fish - About

Water Flow Chart

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Using Water Flow Charts & Weather Reports: Begin with our water flow charts to grasp stream velocity and volume – look for stable or rising trends to pinpoint ideal fishing times. Learn to interpret sudden spikes or drops, which can indicate potential challenges. Next, consult our weather reports to understand ambient conditions. Pairing the two, you can anticipate fish behavior, choose the right gear, and select the best fishing spots. Use these tools together for a holistic approach to your next fishing adventure.

In-Depth Weather

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Directions To Location

Hatch Chart

Month Hatch Time of Day Recommended Fly Sizes Popular Fly Patterns
January Midge Afternoon #16-22 Zebra Midge
February Midge Afternoon #16-22 Zebra Midge
March Scurfa's Cream Midge Afternoon #16-20 Higa's SOS
April Blue Winged Olive Midday-Afternoon #16-20 WD-40, Pheasant Tail
Caddis Evening #14-16 Elk Hair Caddis, X-Caddis
May Caddis Evening #14-16 Elk Hair Caddis, X-Caddis
Salmonfly Daytime #6-8 Rogue Foam Stone, Chubby Chernobyl
June Golden Stone Daytime #8-12 Yellowstone Drifter
Caddis Evening #14-16 Elk Hair Caddis, X-Caddis
Mayfly Midday #12-16 Parachute Adams, Blue Dun
July Caddis Evening #14-16 Elk Hair Caddis, X-Caddis
Drake Midday #10-12 Green Drake, Adams
Yellow Sally Evening #14-16 Yellow Sally Stone
Mayfly Midday #12-16 Blue Dun, Light Cahill
August Caddis Evening #14-16 Elk Hair Caddis, X-Caddis
Drake Midday #10-12 Green Drake, Adams
Hopper Midday #8-12 Dave's Hopper
September Blue Winged Olive Afternoon #16-20 WD-40, Pheasant Tail
October Blue Winged Olive Afternoon #16-20 WD-40, Pheasant Tail
November Blue Winged Olive Early Afternoon #16-20 WD-40, Pheasant Tail
December Midge Afternoon #16-22 Zebra Midge

While we strive to ensure the precision of our hatch charts, some reflect broader river region insights. Through ongoing partnerships with local guides and fly shops, we’re committed to refining our data. Should you notice any inconsistencies or have feedback, we welcome you to reach out. 

Best Fishing Spots

The South Fork Snake River – Lorenzo section boasts some of the finest spots for fly fishing enthusiasts. Popular for its robust trout populations, it promises incredible recreational experiences.

  • Conant Valley: It’s the gateway to South Fork Snake River fly fishing, characterized by a breathtaking setting and rich ecosystem. High catch rates of Rainbow and Cutthroat trout are very common.
  • Swan Valley Bridge: A section ideal for wade fishing. Fishermen come here to test their skills against the Brown trout though they’re less common compared to other areas.
  • Lorenzo Boat Ramp: Suited for both boat and wade fishing. Quality fishing spots are found up and downstream from the ramp, primarily Rainbow and Cutthroat trout.
  • Byington Boat Launch: Located further downstream, this area offers exceptional float fishing opportunities along the river’s deeper sections. Predominantly Rainbow and Cutthroat trout.

Best Access Points

The South Fork Snake River offers impressive fly fishing opportunities with a vast array of fish species, especially trout. Lorenzo is one of the hotspot sections on the river. The best access points in this area are:
  • Conant Valley Boat Ramp: This is a great location to begin a float trip. The ramp is well-maintained and provides angler parking.
  • Spring Creek Bridge: Accessible by County Road, this location offers excellent waist-deep wading spots.
  • Lorenzo Boat Ramp: This ramp, situated right in Lorenzo, is perfect for launching float tubes or rafts.
  • Byington Boat Launch: Just a short drive south of Lorenzo, this launch provides easy access to a stretch of the river known for large rainbow and brown trout.
Remember to follow all local fishing regulations and practise catch and release to preserve the health and future of the river’s fish populations.

Local Fish

  • Brown Trout: Known for its robust, powerful fight, the Brown Trout is a popular target for fly fishermen on the South Fork Snake River.
  • Rainbow Trout: With its beautiful colors and voracious appetite, the Rainbow Trout offers a thrilling challenge for anglers.
  • Cutthroat Trout: Indigenous to the area, Cutthroat Trout are celebrated for their aggressive rise to dry flies.
  • Hybrid Trout: Rainbows and Cutthroats sometimes interbreed, resulting in a Hybrid that fights heartily and grows to an impressive size.
  • Brook Trout: Though less common, Brook Trout inhabit the South Fork Snake River and are a delightful catch.
  • Mountain Whitefish: While not as sought after as the trouts, Mountain Whitefish are plentiful and great fighters.
  • Bull Trout: Hard to come by, and requiring specific fishing regulations, Bull Trout are prized and protected in this system.
  • Sturgeon: Although not typically a fish for fly fishing, the Sturgeon does inhabit the Snake River, and catching one is considered a trophy achievement.

About The River

Immerse yourself in the history of the beautiful South Fork Snake River – Lorenzo. This mesmerizing river is nestled in the heart of Idaho’s rugged landscapes.

Historically, the river was an important route for Native American tribes like the Shoshone and Blackfoot. The river’s name ‘Snake’ originates from a gesture made by a local tribe, misinterpreted by explorers Lewis and Clark as a snake symbol.

The South Fork Snake River, today, offers some of the best trout fishing in North America. A few of the species you might catch include Rainbow, Brown, and Cutthroat trout. As such, the river has evolved into an angler’s paradise!

  • Cutthroat trout take their name from the distinctive red coloration on the underside of their lower jaws.
  • Brown trout are traditionally European but have been successfully introduced throughout the world.
  • Rainbow trout are a North American gamefish that get their name from the beautiful colors that shine on their skin.

The South Fork Snake River’s enchanting history and abundant wildlife make it a must-visit for nature lovers!


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