Troutline

Fly fishing conditions,
river by river.

Live water gauges, weather forecasts, hatch charts, and lunar data for the rivers you fish. Pick a river and go.

Start here

Browse by state

Every state we cover, with a coverage map, live headline per state, and quick links into rivers and regions.

Snowpack & runoff

Western snowpack basin-by-basin, with the seasonal runoff outlook translated into fishing terms.

Hatchery plants

Recent and upcoming stocking from state fish-and-wildlife agencies on the rivers we cover. Updated daily.

Featured waters

A starting point across our coverage — one or two flagship destinations per state.

Truckee River — CA
Truckee RiverCA

A premier tailwater flowing from Lake Tahoe through the Sierra and into Nevada, offering year-round trophy trout fishing for rainbows and browns.

Madison River — MT
Madison RiverMT

The 'Fifty Mile Riffle' below Quake Lake is Montana's most famous wade-and-float water for wild rainbows and browns, with a strong salmon fly hatch in late June and consistent dry fly fishing into October.

North Platte River — WY
North Platte RiverWY

Central Wyoming's string of dam-controlled tailwaters — Miracle Mile, Fremont Canyon, and the Blue Ribbon Grey Reef — supports more than 8,000 wild rainbow trout per mile in the upper Grey Reef reach. Year-round sow bug, scud, midge, and BWO fishing with brown trout streamer windows in fall and spring.

Frying Pan River — CO
Frying Pan RiverCO

Fourteen miles of legendary Gold Medal tailwater below Ruedi Reservoir, ending at the Roaring Fork in Basalt. Mysis shrimp from the reservoir grow huge trout — 'Toilet Bowl' fish below the dam are some of the largest wild rainbows in the lower 48.

Henry's Fork — ID
Henry's ForkID

The Henry's Fork is the spring-fed tailwater that runs from Henrys Lake through Island Park and on to its confluence with the South Fork Snake near Rexburg. The slow flat water of Harriman State Park (the Railroad Ranch) is the most famous technical dry-fly stretch in the West.

Bighorn River — MT
Bighorn RiverMT

The Yellowtail Dam tailwater — 13 miles of fly fishing gold from the Afterbay to Two Leggins. 3,000-5,000 trout per mile, year-round consistent flows, and the West's most reliable sow bug and PMD fishery.

What we track on every river page

55 rivers · 9 states · refreshed daily from public data sources

Live flows

Real-time gauge readings and 7-day hydrographs per fishing section, with historical-median context for read-at-a-glance comparison.

Weather + air quality

Hourly forecast, temperature and precipitation timeline, barometric-pressure trend, and AQI.

Snowpack + runoff

Basin snow-water equivalent vs. normal, seasonal runoff forecast, and a water-year curve showing the shape of the season.

Hatchery stocking

Recent and upcoming plants on every river we cover, refreshed daily from each state's published schedule.

Lunar + solunar

Sunrise and moonrise per river, plus peak feeding windows derived from local sun-moon angles.

Editorial overviews

Plain-voice river writeups — named sections, honest tradeoffs, the rundown you'd get from a friend who knows the water.

About Troutline

Troutline is built to answer the questions you ask before a fishing trip: are flows good, what's the weather doing, are hatches active, where can I find a fly shop or hire a guide? We aggregate public conditions data and write editorial overviews for each river so the rundown lives on one page instead of fifteen browser tabs.

The goal is to be the first thing an angler checks before heading out — a place where you trust the numbers, get an honest read on the water, and don't have to wade through marketing copy or scattered forums to plan a day. Currently covering California, Colorado, Idaho, Montana, and Wyoming, with Oregon and Washington next; the long-term goal is every major fly-fishing destination in the West, then east.