Blue Stream Fly Fishing
Fly Fishing Report for:

South Fork Snake River - Irwin - Idaho

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

Water Flow Chart

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

Directions To Location

Hatch Chart

Month Hatch Time of Day Recommended Fly Sizes Popular Fly Patterns
January Midges Afternoon 18-22 Zebra Midges, Black Beauties, Griffith's Gnats
February Midges Afternoon 18-22 Zebra Midges, Black Beauties, Griffith's Gnats
March Blue Winged Olive, Midge Noon-Afternoon 16-20 BWO Comparadun, Zebra Midges
April Blue Winged Olive, Midge Noon-Afternoon 16-20 BWO Comparadun, Zebra Midges
May Caddis, Blue Winged Olive, Golden Stone Afternoon-Evening 12-16 Elk Hair Caddis, BWO Comparadun, Stimulators
June PMDs, Caddis, Stonefly Afternoon-Evening 12-16 Yellow PMDs, Elk Hair Caddis, Stonefly Nymphs
July PMDs, Caddis, Green Drakes, Stoneflies Afternoon-Evening 10-14 Yellow PMDs, Elk Hair Caddis, Green Drake Patterns, Stonefly Nymphs
August PMDs, Caddis, Hoppers, Tricos Afternoon-Evening 12-18 Yellow PMDs, Elk Hair Caddis, Dave's Hopper, Trico Spinners
September PMDs, Caddis, Hoppers Afternoon-Evening 12-18 Yellow PMDs, Elk Hair Caddis, Dave's Hopper
October Blue Winged Olive, Midges Afternoon 16-20 BWO Comparadun, Zebra Midges
November Midges Afternoon 18-22 Zebra Midges, Black Beauties
December Midges Afternoon 18-22 Zebra Midges, Black Beauties

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

In Irwin, Idaho, the South Fork Snake River is one of the most esteemed fly fishing destinations for trout fishing enthusiasts. Below are some of the top spots for fly fishing this renowned river.

  • Swan Valley Bridge: Accessible and prolific, this spot is known for its thriving population of rainbow and brown trout.
  • Conant Valley Boat Ramp: Conant provides ample river access for boat launching and wade fishing.
  • Spring Creek Bridge: Spring Creek is ideal for anglers seeking quiet, less-trafficked fishing spots.
  • Rainey Bridge: This area boasts deeper waters and larger fish.
  • Byington Boat Launch: Byington provides excellent river access and is the beginning of a popular float-fishing stretch.

Each of these locations have their unique attributes that offer a variety of fly fishing experiences.

Best Access Points

The South Fork Snake River in Irwin, Idaho is a popular destination for fly fishing enthusiasts. Here are the best access points on the river:

  • Conant Valley Boat Launch: This is a convenient launch point located just off of Highway 31.
  • Spring Creek Bridge Access: Accessible via N 1300 W, it provides great fishing spots and is ideal for wading and floating.
  • South Fork Lodge: Located at 40 Conant Valley Loop Road, the lodge offers easy river access and the opportunity to relax after a day of fishing.
  • Palisades Creek Trail: Start your fly fishing adventure here, just off of Highway 26.
  • Wolf Flat Access Point: On E 4000 S, this less crowded spot takes a little more effort to reach but rewards with stunning scenery and efficient fishing.

Remember to respect local access rules and enjoy your fly fishing trip.

Local Fish

  • Trout
    1. Yellowstone Cutthroat Trout: Native to the Snake River, these fish provide a thrilling fight and are a desired catch for anglers.
    2. Rainbow Trout: Known for their fighting spirit and beautiful coloration, the Rainbow trout is a rewarding catch for any angler.
    3. Brown Trout: Although not native to the Snake River, Brown trout have thrived in its waters and offer a challenging catch for experienced fishers.
  • Mountain Whitefish: Very common in the South Fork Snake River, these fish are great for beginners due to their abundance and relatively easy catchability.
  • Pikeminnow: These fish are not typically targeted by anglers but can offer a nice change of pace for those seeking something different.
  • Sturgeon: While not frequently targeted by fly fishers in the South Fork Snake River, Sturgeon still present an exciting and challenging catch.
  • Bass
    1. Smallmouth Bass: These hard fighting fish can offer a tough challenge for any angler, experienced or beginner.
    2. Largemouth Bass: Although less common in the Snake River than Smallmouth Bass, Largemouth Bass still provide a fun and exciting fishing experience.

About The River

Ready for a glimpse into the stunning beauty of South Fork Snake River, on the way to the picturesque city, Irwin? This gorgeous water body has a rich history and an enchanting aura.

  • South Fork Snake River is a major tributary of the iconic Snake River, originating from the Western side of the Yellowstone National Park.
  • Throughout history, it has served as an essential food source and transport route for Native American Tribes.
  • Fast forward to the mid-19th century, early settlers found its fertile banks promising for farming and ranching, contributing significantly to the region’s economic growth.
  • Even today, its biodiverse ecosystem is riveting, housing various endangered species and promoting ecological balance.

Flanked by beautiful views and dotted with recreational spots, the Snake River South Fork offers an astonishing blend of nature, history, and adventure. Its enchanting presence never fails to mesmerize everyone who visits.

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