Issue No. 3 · Week of July 20, 2026 · The Weekly Lowdown

One cool day, then the furnace.

Wednesday is the gift — storms break the heat and knock the high down to 90. After that it's 95, 98, 97, 97 with near-record air Friday and Monday. Take the cool day if you can get it, and fish first light the rest of the week.

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This Week's Bite

Fair · Dawn Only
SlowFairGoodHot
01

The Lowdown

A flood watch is up as this goes out — monsoon cells are working the county Tuesday afternoon and again Wednesday morning, which is the only real break in the pattern. Wednesday tops out near 90 under broken cloud. Then the ridge rebuilds and doesn't quit: 95 Thursday, 98 Friday, and 97 through the weekend, running about 5° above the July normal with Friday and Monday flirting with records. The water is telling the same story. The lower Humboldt basin ran 3% of median in June — a record — and the valley river has not recovered. So the plan narrows to one line: be on the water at first light, be off it by nine, and go up in elevation for anything longer than that.

02

Water Conditions

Ruby Mtn Lakes — Lamoille Canyon

AccessOpen
ClarityGin
Surface Temp64°F
Storm RiskPM Tue/Wed

Still the county's best water, but the alpine lakes are warming too — 64° on the surface at the lower lakes, cooler as you climb. Caddis are on the water morning and evening and the brookies will eat a beetle all day if the wind stays off. Cells build over the crest Tuesday and Wednesday; watch the towers and don't get caught on a pass.

Reservoirs — South Fork & Wild Horse

LevelDropping
ClarityAlgae Bloom
Surface TempLow 70s
TrendHot

Surface temps are into the low 70s and the trout are down deep and stressed. Give them a pass entirely this week — there's no honest way to fish for them here without killing some. The wipers, though, are built for it: chase the first-light bait boils at South Fork with a streamer and leave the trout alone. Watch for blue-green algae along the calm shorelines and keep dogs out of it.

Rivers & Streams — Humboldt & Lamoille Creek

Humboldt Flow~5 cfs Carlin
Basin Runoff3% of median
Water TempLethal PM
LamoilleDawn only

The Humboldt is done for the season below the canyons — a chain of warm, shrinking pools holding fish that are surviving, not feeding. Leave it be. Storm runoff may put a slug of muddy water through the burn scars midweek; that's a hazard, not an opportunity. Lamoille Creek is the one moving-water option and it's a dawn fishery now — thermometer in the pocket, off the water past 67°F.

Native Waters — Jarbidge & the Snake Range

RoadsDry · slick after cells
ClarityClear
Water Temp57°F
StatusWild · C&R

The cold headwaters are the real refuge in a week like this. Redband and Bonneville cutthroat are looking up in the shaded pocket water, and 57° means a hooked fish actually swims off. It's a long drive for small fish and that's the whole point. Bull trout in the Jarbidge go straight back, no exceptions.

03

Weather Outlook

Mon
Hot
96°
SW 8
Tue
T-Storm
97°
SW 10
Wed
T-Storm
90°
WNW 5
Thu
Sunny
95°
SW 5
Fri
Hot
98°
W 6
Sat
Hot
97°
W 8
Sun
Hot
97°
SW 8
Wind in mph · Wednesday is the only day under 95 · sunrise 5:30, first light 4:58 — the window opens earlier than you think · live 10-day forecast →
04

The Fly Box

Elk Hair Caddis
#14–16 · dry

The morning and evening fly on Lamoille Creek and the high-lake shallows. Tan or olive, skated an inch and stopped — the brookies come up hard for the wake before they ever look at the drift.

Foam Beetle
#14–16 · dry

A hot, still, terrestrial week. Black foam with a bright post so you can see it, dropped tight to the bank or the cruise lane. It sits low and doesn't spook fish the way a hopper does in flat alpine water.

Zebra Midge
#16–20 · 10–16 ft

When the surface goes quiet by mid-morning, this is how you keep fishing. Black with silver rib, hung deep off the drop-offs at the Ruby lakes. Go smaller and deeper than feels right.

Olive Woolly Bugger
#8–10 · slow strip, deep

The all-purpose answer for warm water and deep fish. Weighted, counted down, crawled along the weed line — and the same fly, stripped fast, will get you bit in a South Fork wiper boil at first light.

05

Hot Spot of the Week

Jarbidge River — East Fork
Jarbidge Wilderness · ~6,500 ft

Four hours from Elko on dirt, and the right call in a near-record heat week. The East Fork runs cold and shaded out of the wilderness — 57° water while the valley sits at 98 — and the redband in the pocket water have seen almost nobody. Small fish, tight casts, wet hands. Go for the country and the cold water, not the numbers, and check road conditions after any storm cell.

TargetRedband · Bonneville Cutthroat
Best Window7:00 AM–12:00 PM
MethodCaddis / beetle in the pocket water
06

Field Notes

07

Catch of the Week

Rainbow at South Fork Humboldt · below the dam
Ryan Douglass · @ryandouglass
South Fork Humboldt · below the dam  ·  Rainbow

Proof the tailwater carries the day when the rest of the Humboldt won't. While the valley river is down to a warm trickle, the cold release below South Fork Dam keeps this canyon fishing.

Landed a good one? Email it to info@greatbasinflyfisher.com or tag #greatbasinflyfisher — you could be next week's feature.

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Take Wednesday if you can get it. — Great Basin Flyfisher

Questions, tips, or a report from the water? info@greatbasinflyfisher.com