Blue Stream Fly Fishing
Fly Fishing Report for:

Boise River - Anderson Ranch Dam - 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
February Midges Late Afternoon 18-22 Zebra Midges, Brassies
March Blue Wing Olives Midday-Afternoon 16-20 Pheasant Tail Nymphs
April Blue Wing Olives, March Browns Midday-Afternoon 12-16 Pheasant Tail Nymphs, Hare's Ear
May Caddis, Golden Stoneflies Morning-Evening 14-16, 8-12 Elk Hair Caddis, Stimulators
June Green Drakes, Golden Stoneflies Morning-Afternoon 8-12, 14-16 Green Drake Duns, Stimulators
July PMD's, Caddis Midday-Evening 14-18 Comparaduns, Elk Hair Caddis
Golden Stoneflies, Grasshoppers Morning-Afternoon 8-12, 6-10 Stimulators, Dave's Hoppers
August PMD's, Caddis Midday-Evening 14-18 Comparaduns, Elk Hair Caddis
Grasshoppers, Golden Stoneflies Morning-Afternoon 6-10, 8-12 Dave's Hoppers, Stimulators
September BWO's, Mahogany Duns Afternoon-Evening 16-20 Comparaduns, Pheasant Tail Nymphs
October BWO's, October Caddis Afternoon 14-18 Isonychia Nymphs, Elk Hair Caddis
November Midges, BWO's Late morning-Afternoon 18-22, 16-20 Zebra Midges, Pheasant Tail Nymphs
December Midges Afternoon 18-22 Zebra Midges

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

Anderson Ranch Dam on the Boise River is a popular spot among fly-fishing enthusiasts, where one can encounter numerous varieties of local fish including Rainbow Trout, Brown Trout, and Mountain Whitefish. Some of the top spots are:

  • South Fork: This area offers deep runs and boulder-strewn pockets where the fish like to hide.
  • Middle Fork: Shallow riffles combined with deeper pools make the Middle Fork perfect for fly anglers.
  • North Fork: It is known for its small pocket water fishing and beautiful surrounding scenery.

The fishing season runs year-round but the best time is during Spring as the fishing heats up in these times. Ensure to check local regulations for catch limits and rules. Regardless of your experience level, this area will provide an excellent fly-fishing experience.

Best Access Points

The Boise River at Anderson Ranch Dam is a haven for fly fishing enthusiasts. Here are some of the best access points:

  • Moose Creek Reservoir: It is located upstream of the dam and is a preferred spot among local anglers. You will not only catch rainbows and browns, but also native cutthroats.
  • Little Camas Reservoir: Situated east of the dam, this reservoir provides year-round fishing due to its warm water.
  • Big Smoky Creek: It is situated northwest of the dam and is best during the spring and fall seasons.
  • South Fork of the Boise River: Located south of the dam, this area is abundant in rainbow trout, making it a fly fisherman’s delight.
  • Anderson Dam Outlet: The outlet below the dam is accessible via Anderson Dam Road and offers exceptional fishing throughout the year.

Local Fish

  • Brown Trout : This variety is popular among fly fishers as they are very active in the Boise River and pose a great challenge for anglers.
  • Rainbow Trout : They dominate the Boise River and appears in all sizes, thus providing a good catch for anglers.
  • Bull Trout : Bull trout can be found in the Boise River, though they are a little less common than other variety. They are considered a prized catch due to their size.
  • Whitefish : Common whitefish are abundant in these waters and are particularly attractive for their size and appetizing quality.
  • Channel Catfish: Commonly found in the Boise River, this variety offers challenging fights and are memorably large.
  • Kokanee Salmon: An exciting catch for many anglers due to their fighting spirit and distinct beauty.
  • Smallmouth Bass: A small but feisty variety that are found in good numbers in the Boise River.
  • Largemouth Bass : While not as common as the other varieties, the Largemouth Bass provides a fantastic experience for fly fishers when found.

About The River

The Boise River – Anderson Ranch Dam has a fascinating history! It was initially authorized in 1941 as a flood control and water storage project. However, due to World War II, construction didn’t begin until 1947, making it a notable structure in Boise’s post-war development.

  • The dam was a formidable part of the Boise River Project, which developed three reservoirs to provide irrigation, hydroelectric power, and flood control.
  • With a height of 456 feet, it was the highest dam of its kind in the world when completed in 1950.
  • Today, the reservoir created by the dam provides a fun area for local residents and tourists to enjoy leisurely activities such as boating and fishing.

So, the next time you take a sip of water in Boise, remember the Anderson Ranch Dam – a shining emblem of Boise’s history and its efforts towards sustainable resource development.

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