Wade · Best fit82/100
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
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Fly fishing report · West
Henry's Fork of the Snake River
A Henry's Fork report for Island Park, Box Canyon, Harriman Ranch, and lower reach planning, with RiverReports/USGS flows, IDFG rules, hatches, flies, and access notes.
Check flow & weatherToday's fishing decisionMost live data available
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Henry's Fork of the Snake River looks fishable right now.
Current USGS flow is 950 cfs and has been stable for about 6 hours. Today's flow is below the normal seasonal range, which begins near 961 cfs. This is below normal, so edge depth, temperature, and pressure matter.
Best supported approachWade
Watch nextFlow: Current USGS flow is 950 cfs and has been stable for about 6 hours. Today's flow is below the normal seasonal range, which begins near 961 cfs.
Updated Aug 3, 1:27 AM UTCUsually refreshes about every 45 minutes
Best supported approachWade
Compare wading, bank fishing, and floating before choosing how you will fish.
Bank / edgeNeed data
This report does not describe this as a primary mode. Verify legal access, depth, launches, and retreat options before planning around it.
Float82/100
A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.
Check before you drive
Current flow and weather.
Look at whether the river is rising or falling, then check wind, rain, and storms. These can change both safety and fishing.
Loading current flow and weather.
Before you rely on this report
How current is this report?
Conditions can change quickly. Check these dates before you decide to fish, and open the official source when safety or rules matter.
- River conditions
- Checked Aug 2, 2026, 9:27 PM
- Fishing guidance
- Reviewed May 31, 2026
- Public access
- No reviewed map pin available
- Rules and closures
- Official rule links checked
High confidence in the current score inputs.
6 sources are listed below for you to open.
4 public access records are listed. Private spots are never shown.
Source checked Jul 30, 2026
Plan your access
Know where you can enter.
These are public parking, launch, trail, or recreation areas—not secret fishing spots. We never show an angler's private pins, notes, or photos here.
- 0
- Shown on map
- 4
- No map pin
Location checkedDescription only
01No map pin
Boat launch
Island Park and Box Canyon
Upper tailwater flow reference with faster pocket water and boat/wade options.
Restrictions and seasonal notes
Rules vary sharply by reach and date.
Wind can matter as much as flow on slow meadow water.
02No map pin
Area description
Last Chance and Harriman Ranch
Technical meadow water with seasonal and gear restrictions.
Restrictions and seasonal notes
Rules vary sharply by reach and date.
Wind can matter as much as flow on slow meadow water.
03No map pin
Area description
Ashton and Mesa Falls area
Middle-river planning with different water speed and access.
Restrictions and seasonal notes
Rules vary sharply by reach and date.
Wind can matter as much as flow on slow meadow water.
04No map pin
Boat launch
St. Anthony and lower Henry's Fork
Lower-river access and boat planning with separate gauge context.
Restrictions and seasonal notes
Rules vary sharply by reach and date.
Wind can matter as much as flow on slow meadow water.
How to fish it
Pick the reach before you pick the fly.
The Henry's Fork is not one simple report. Box Canyon, Last Chance, Harriman Ranch, Ashton, and St. Anthony all fish differently, so use the Island Park flow and confirm reach-specific rules before you commit.
- Use the Island Park gauge for upper river and Ranch planning.
- Check IDFG rules for Big Springs, Box Canyon, Harriman Ranch, and lower reaches separately.
- Expect technical dry-fly windows in the Ranch and faster nymph water in Box Canyon.
- Use weather and wind checks before planning long meadow sessions.
Why the score looks this way
FlowUse caution
USGS shows 950 cfs with a stable over about 6 hours trend. Today's flow is below the normal seasonal range, which begins near 961 cfs. This is below normal, so edge depth, temperature, and pressure matter.
SeasonHelps score
Early summer: Ranch opener, PMDs, caddis, green drakes, and salmonflies can all shape plans.
WeatherHelps score
The NWS forecast is about 80F with Patchy Smoke.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Fishing usefulnessHelps score
Skip or change reaches when Harriman Ranch dates or special rules are unclear, when releases make wading or floating unsafe, when wind defeats technical dry-fly fishing, or when crowding would force poor etiquette.
Read the water
What changes the plan.
The Henry's Fork is best when the reach, flow, hatch, and rules all line up. If one section is high, crowded, closed, or wind-hit, use another gauge and choose a different reach.
Stable upper flow
Good for Box Canyon nymphing and Ranch dry-fly planning when wind allows.
High release
Favor boats, edges, and heavy nymphs where legal; avoid unsafe crossings.
Low clear Ranch water
Use long leaders, careful angles, and match the actual insect stage.
Windy meadow day
Shift to protected edges, Box Canyon, or a lower reach instead of forcing tiny dries.
Your trip plan
Know when to go—and when to skip it.
Best flows
Use the RiverReports Island Park chart and USGS 13042500 together. Stable releases make the best technical window; sudden changes, heavy wind, or off-color water should move you to a different reach, safer bank, or another nearby river.
When to skip
Skip or change reaches when Harriman Ranch dates or special rules are unclear, when releases make wading or floating unsafe, when wind defeats technical dry-fly fishing, or when crowding would force poor etiquette.
Local plan
Start with the style of day: Box Canyon nymphs and streamers, Last Chance and Ranch dry-fly work, or a lower-river float. Then check access, rules, flows, and wind for that reach rather than relying on one river-wide plan.
Backup water
If the Henry's Fork is windy, crowded, rule-sensitive, or off-color, compare the South Fork of the Snake, Silver Creek, or Madison River after checking current flows and regulations.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
SpringMidges, BWOs, caddisZebra midge, BWO emerger, soft hackle, caddis pupa
Fly pattern · report suggests “Zebra midge”Zebra MidgeLook for a very slim tapered thread body, evenly spaced contrasting wire rib, a small bead, and no tail or wing. The reviewed classic is black with silver wire and a silver bead. Red, olive, brown, glass-bead, jig-hook, resin-coated, or tailed forms must remain labeled variations rather than replacing the classic identity.See photos & how to fish it ↗
Fly family · report suggests “BWO emerger”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗+ 2 more reviewed guides in the Fly Box Early summerSalmonflies, golden stones, PMDs, green drakesChubby, stonefly nymph, PMD emerger, green drake dry
Fly pattern · report suggests “Chubby”Chubby ChernobylIdentify the construction, not the color: a long foam overbody over a segmented dubbed underside, rubber legs at two tie-in stations, two distinct buoyant synthetic-yarn wing sections, and a short flash tail. The paired wing stations and layered foam-and-dubbing body separate the reviewed Chubby from the original Chernobyl Ant and from generic foam hoppers or beetles.See photos & how to fish it ↗
Fly family · report suggests “stonefly nymph”Stonefly Nymph PatternsStonefly nymph patterns generally emphasize two tails, a broad thorax, segmented abdomen, and bottom contact; rubber legs, biots, beads, and jig hooks define different exact forms.See family guide ↗+ 2 more reviewed guides in the Fly Box Mid to late summerTricos, callibaetis, terrestrials, caddisTrico spinner, callibaetis emerger, ant, hopper, caddis
Fly pattern · report suggests “Trico spinner”Trico SpinnerThe reviewed dry form is extremely sparse and flat, using a black body or thread head and pale spent wing. A weighted Sunken Trico Spinner is a separate variant.See photos & how to fish it ↗
Fly family · report suggests “callibaetis emerger”Callibaetis PatternsCallibaetis are small minnow mayflies associated with stillwaters, but the fishing label can refer to swimming nymphs, emergers, upright winged adults, or spent imagos. The three natural adults here all carry upright wings and paired tails, yet their wing mottling, eye form, abdomen color, and proportions differ enough that one universal gray-and-mottled recipe would be misleading.See family guide ↗+ 3 more reviewed guides in the Fly Box FallBWOs, midges, October caddisBWO dry, RS2, zebra midge, October caddis, streamer
Fly family · report suggests “BWO dry”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗
Fly pattern · report suggests “RS2”RS2Start with the beadless architecture: two dark-dun Microfibett tails separated behind a slim, tightly twisted and visibly segmented dubbed abdomen; a fuller thorax; and saddle-hackle web clipped into a short angled wing bud. Rim Chung's original-style form uses natural beaver dubbing and hackle web. CDC- or Antron-wing ties, beads, curved hooks, flash, and tailless Avatar-style flies must remain labeled variations.See photos & how to fish it ↗+ 3 more reviewed guides in the Fly Box 01
Choose Box Canyon, Ranch, Ashton, or lower river before rigging.
02
Use the Island Park gauge for upper reach flow and another gauge if fishing far downstream.
03
On Ranch water, wait for feeding fish and make fewer better casts.
04
In Box Canyon, use heavier nymph rigs and cover pockets efficiently.
05
Check park rules, closure dates, and barbless/fly-only language before fishing.
Rules & closures
Check the official rules before you go.
Open the agency page to confirm the exact river section, species, season, tackle rules, limits, and emergency closures.
Official links checkedRules for this river or sectionSpecial rule found
Special regulation
Henrys Fork regulated reaches
IDFG splits Henrys Fork into reach-specific rules, including catch-and-release periods, barbless and no-bait water, and a Harriman Ranch seasonal closure. Match the access point to the planner.
Rules checkedJul 30, 2026
Report a correction ↗Always follow the official rule
This summary helps with trip planning. The linked agency rule is the one you must follow.
Updates from anglers
What anglers are seeing.
Recent observations from general areas of Henry's Fork of the Snake River. We review every update before it appears and never publish exact fishing spots, private access details, or photo locations.
Angler updates are not loading right now.
You can still use the river plan above. Check back later for recent observations from other anglers.
Where this report comes from
Open the sources we checked.
Fishing guidance checked: May 31, 2026
Site check: Jul 14, 2026. We regularly test report links, live scores, flow and weather data, and page loading. The content date changes only when the fishing guidance or its sources change.
Common questions
Before you leave.
Which Henry's Fork gauge should I use?+
Use Island Park for upper river, Box Canyon, and Ranch planning; check Ashton or St. Anthony if fishing lower reaches.
When does Harriman Ranch open?+
Check IDFG each season. The Ranch has specific closure and fly-fishing-only/barbless language.
Is the Henry's Fork beginner friendly?+
Some faster reaches are approachable, but Ranch dry-fly fishing can be very technical.
What should I check besides flow?+
Wind, reach rules, access, weed growth, and the actual hatch stage matter.