Idaho

Henry's Fork Fishing Forecast

The Henry's Fork is a spring-influenced Idaho trout stream where gin-clear water and picky fish reward patient drifts and fine tippet. Anglers target rainbow trout and brown trout across riffles, seams, and undercut banks in this region, with prime dry-fly and nymph windows typically clustering in late June through September. USGS gauge 13053000 tracks live flow and temperature for planning wade or float days. Local tactics angle: The Henry's Fork is one of the most technical trout streams in North America. The Railroad Ranch section is legendary for large, selective rainbows. TroutFishing pairs hatch timing with solunar windows so you know when to be on the water—not just where.

Local Knowledge: Henry's Fork

Based on local angler reports · Idaho · always verify before traveling

A regional note specific to this water: the river's character is shaped by the geology of the surrounding hills, and the trout that live here are the result of generations of adaptation to those specific conditions, which is why the patterns that work here are not the patterns that work elsewhere. the river's most productive anglers are the ones who sit still, and sitting still is harder than casting, and casting is harder than tying, and tying is harder than buying, and the anglers who sit still are the anglers who buy the least and catch the most, and the most fish are the fish the river gives back to those who sit still. The South Branch of the Potomac River in eastern West Virginia is a freestone river in the high country of the Appalachian Mountains, and the only river in the state that produces a 5-fish day of wild browns and rainbows from a river that runs through a high-piedmont agricultural landscape. The river drains a series of small streams in Pendleton and Hardy counties, runs for about 140 miles through the South Branch valley, and finally drains into the Potomac River at the town of Green Spring. What we tell our friends: The most popular trout water is the upper river between the town of Circleville and the town of Brandywine, and that water is managed as a wild trout fishery by the West Virginia Division of Natural Resources. The most popular access is the public water at the town of Brandywine, where the George Washington National Forest maintains a series of campgrounds and walk-in access to the upper river. The river is a freestone in the canyon and a tailwater below the dam. The most famous hatch is the PMD of mid-summer, which is the hatch every angler in the area knows about. The river is unforgiving of complacency, and it rewards those who pay attention to the small details that other anglers miss. The most famous local fly shop is the South Branch Outfitters in Brandywine, and the owner's advice is consistent: fish the upper river, fish the Hendrickson hatch, and stay out of the water. The most productive flies are 16-18 Disco Midge for the summer hopper-dropper rig, 22-24 Top Secret Midge for the summer caddis hatch, and a Leech 8-10 a Crayfish for the trophy fish. The river's personality is one of brown-trout patience — the fish are large, the water is clear, and the only way to catch them is with a long leader, a small streamer, and a slow retrieve. Stay in Brandywine or Franklin, eat at the Blue Grass Valley Diner, and fish the river in two sections — the upper meadow water above the town of Circleville and the lower freestone water below. It is a river that teaches by doing, and the only way to learn it is to fish it; books help, but the water teaches more. If you can read a river, you can read any river; reading water is the most transferable skill in fly fishing, and it is the skill that separates the best anglers from the rest.

Content generated from public regional fishing sources. Confirm access, regulations, and current conditions with the Idaho fish and wildlife agency before your trip.

The Henry's Fork tailwater is sitting at moderate flows with a stable 66°F°F reading. Today's rating: 5/10. Top pick: a Parachute Hopper.

Check RegsHigh confidence

Complex season — varies by section

Railroad Ranch section: catch-and-release Dec 1 to Fri before Mem Day. Other sections: Mem Day wknd - Nov 30 (6 trout). Some sections open year-round C&R

Limit: 6 trout (Mem Day-Nov 30); C&R off-seasonGear: Artificial flies only in Ranch section; no motors
View full regulations

Forecast and on-page guide updated June 24, 2026 (UTC). Open the app for hourly conditions.

Today's Fishing Conditions

5/10

Fair

Updated 4:10 AM

Water Temp

66°F

Flow Rate

--

Best Time

2 PM - 4 PM

Top Fly

Parachute Hopper

7-Day Forecast

Today
5
Good
Tmrw
6
Good
Fri
6
Good
Sat
5
Good
Sun
5
Fair
Mon
5
Good
Tue
6
Good
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Quick Facts

Species

Rainbow Trout and Brown Trout

River Type

spring creek

June Water Temp

54°F - 64°F

What Makes the Henry's Fork Unique?

Signature hatch or window

Salmonfly (Stonefly) is a headline hatch to watch in June. Peak activity often tracks 48–58°F water temps.

Distinctive access

Big Springs: Headwaters access. Crystal clear spring water.

Rules anglers miss

Artificial flies only in the Ranch section. No motors.

June Fishing Tactics

Primary Targets

Rainbow TroutBrown Trout

Recommended Tactics

HoppersTerrestrialsPMDs

Prime dry fly season. Evening hatches can be spectacular.

June Hatches

Salmonfly

Stonefly

Primary
48-58°FPeak: 10AM

Giant stonefly hatch, moves upstream as water warms above 52F

Golden Stone

Stonefly

Primary
50-62°FPeak: 11AM

Follows salmonfly hatch, active during midday

PMD

Mayfly

Primary
55-65°FPeak: 10AM

Henry's Fork PMD hatch is world-famous, spinner falls in mornings

Green Drake

Mayfly

Primary
50-60°FPeak: 11AM

Green Drake hatch June into early July, best on cloudy humid days

Caddis

Caddis

Primary
50-68°FPeak: 6PM

Evening caddis hatches prolific through summer

Year-Round Fishing Guide

MonthWater TempTactics
January32-38°FNymphing, Midges, Small Streamers
February32-40°FNymphing, Midges, Small Streamers
March36-46°FDry Flies, BWOs, Skwala
April42-52°FDry Flies, BWOs, Skwala
May48-58°FDry Flies, BWOs, Skwala
June(Now)54-64°FHoppers, Terrestrials, PMDs
July58-68°FHoppers, Terrestrials, PMDs
August60-70°FHoppers, Terrestrials, PMDs
September54-64°FStreamers, BWOs, October Caddis
October46-56°FStreamers, BWOs, October Caddis
November38-46°FStreamers, BWOs, October Caddis
December32-40°FNymphing, Midges, Small Streamers

Spawning Seasons

Please respect spawning fish and their redds. Avoid fishing over actively spawning trout.

Brown Trout

Spawn months: October, November

Night spawning common. Males become very dark with pronounced kype during spawn.

Rainbow Trout

Spawn months: March, April

Resident rainbow trout spawn in smaller tributaries and tend to build smaller redds than steelhead.

Access Points & Parking for Henry's Fork

Big Springs

Headwaters access. Crystal clear spring water.

Facilities:Parking, Restrooms
Best for:Upper river fishing

Last Chance

Access to the famous Railroad Ranch section.

Facilities:Parking, Services
Best for:Technical dry fly fishing

Osborne Bridge

Box Canyon access.

Facilities:Parking
Best for:Box Canyon fishing

Ashton

Lower river access.

Facilities:Parking, Town Services
Best for:Lower river fishing

How to Fish Henry's Fork: Tips & Tactics

The Henry's Fork is one of the most technical trout streams in North America. The Railroad Ranch section is legendary for large, selective rainbows.

Best Times of Day

Prime season with green drakes in late June. PMDs hatch through July. Trico hatches bring morning action in August. Fish rise in predictable locations - learn the water and find your fish before casting.

Recommended Techniques

Match the hatch precisely and use light tippet. Observe feeding lanes and time your casts. Long, drag-free drifts are essential. The Last Chance Cripple pattern was developed for this water.

Water Conditions

Runoff can be challenging in spring. Focus on spring creek sections during high water. Optimal flows are 400-1,200 CFS on the Ranch.

Fly Selection

Green Drake and PMD patterns are essential. Trico and rusty spinner patterns for late summer. Last Chance Cripple is a must-have pattern.

Local Knowledge

Book guides early for prime dates. The Ranch water rewards patience and observation. This is dry fly fishing at its finest.

Local Tips

Last Chance, Idaho is the gateway to Henry's Fork fishing. The Henry's Fork Foundation supports conservation efforts.

When is the Best Time to Fish Henry's Fork?

Spring

Runoff can be challenging. Focus on spring creek sections.

Summer

Prime season with green drakes, PMDs, and Tricos. July-August is best.

Fall

October caddis and streamers. Brown trout move up from the reservoir.

Winter

Limited winter access. Some sections fish through mild weather.

Recommended Equipment for Henry's Fork

Rod

9-foot, 4 or 5-weight for most fishing.

Line

Floating line with long leaders.

Leader & Tippet

12-15 foot leaders, 5X-6X tippet.

Waders

Breathable waders. Cold spring water even in summer.

Essential Flies

Green DrakePMDRusty SpinnerTricoLast Chance Cripple

Henry's Fork Fishing Regulations

Season

Open June through November. Check current dates.

Limits

Catch-and-release for rainbow trout in most sections.

Special Regulations

Artificial flies only in the Ranch section. No motors.

Bait Restrictions

Artificial flies only.

Notes

Check Idaho Fish and Game for current regulations.

Always verify current regulations with Idaho fish and wildlife agency before fishing. Regulations can change annually.

Fly Shops & Guides Near Henry's Fork

Local Fly Shops

  • Henry's Fork Anglers - Last Chance
  • TroutHunter - Island Park
  • Last Chance Lodge

Guide Services

  • Henry's Fork Anglers Guides
  • TroutHunter Guide Service
  • Mike Lawson's Guide Service

Optimal Fishing Conditions

Optimal Flow

400 - 1200 CFS

Best fishing conditions

Optimal Water Temperature

50° - 62°F

Ideal for active trout

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Henry's Fork — frequently asked questions

When is the best time to fish the Henry's Fork?

Prime dry fly season. Evening hatches can be spectacular.

What flies should I bring to the Henry's Fork?

For the Henry's Fork (spring creek), carry: Green Drake, PMD, Rusty Spinner, Trico, Last Chance Cripple.

What water temperature is best for trout on the Henry's Fork?

On the Henry's Fork, trout hold between 50° and 62°F. The spring-fed source keeps temperatures remarkably stable.

Do I need a fishing license for the Henry's Fork?

Yes — you need a valid Idaho fishing license to fish the Henry's Fork. Local season: Open June through November. Check current dates.. Daily limit: Catch-and-release for rainbow trout in most sections..

What hatches should I watch for on the Henry's Fork in June?

Salmonfly is the signature hatch on the Henry's Fork in June. Match size and adjust leader size to 5X-6X. The fish key in on the emergence during low-light hours, so plan to be on the water at first light.

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