Big Thompson River
○ Live fetch unavailable — showing sample data
~125 cfs out of Lake Estes (cold, controlled; Kirk's July) · ~143 cfs Moraine Park inside RMNP · ~286 cfs above Lake Estes — flows on the rise on the Thompson · fishing very good from the tailwater down through the canyon
Today (Sun Jul 5) ~78°F Estes, mostly sunny with only an isolated PM storm — good all-day window; scattered storms return Tue–Wed. Tailwater fishing well — Kirk's (July): out of Lake Estes ~125 cfs (cold, controlled), Moraine Park ~143 cfs, above the lake ~286 cfs — flows on the rise on the Thompson. Freestone sections: large stoneflies, caddis, mayflies and attractor patterns all working well. Tailwater: size DOWN baetis and stonefly patterns, and mix in scud, worm and caddis patterns. Also producing: Rainbow Warrior, CDC Pheasant Tails, Sow Bugs, Copper Ribbed RS2, Pat's Rubber Legs, Radiation Baetis, Sparklewing RS2, Blue Poison Tung. Hopper/dropper below Drake. RMNP timed-entry active — reservation required 9am-2pm daily.
Kirk's July: tailwater ~125 cfs out of Lake Estes (cold, controlled), Moraine Park ~143 cfs, above Lake Estes ~286 cfs — flows on the rise on the Thompson. Freestone sections: large stoneflies, caddis, mayflies and attractors all working well; tailwater: size down baetis/stonefly and mix in scud, worm and caddis patterns. Fishing very good from the tailwater down through the canyon. C&R artificial only below Lake Estes for ~9 mi — the cold tailwater is the heat-proof play. Mountain pattern: today (Sun Jul 5) ~78°F Estes, mostly sunny — good all-day window; scattered storms return Tue–Wed. Trail Ridge Road open. RMNP timed-entry in effect 9am-2pm daily May 22 thru Oct 12.
Fly-shop reports
3 shops report on Big Thompson RiverReports are pulled live from each shop when you open this river. Shop wording varies — tap through for the full, original report.
Fishability Score breakdown
How today's 92 is built. Flow 35% · Water temp 25% · Weather 20% · Hatch 20%.
Weather & hatch are placeholder factors until wired to live sources.
What to throw — by time of day
Leech / Pat's Rubber Legs anchor + caddis larva, hothead sowbug + Pheasant Tail #18, Perdigon #18, Black Beauty #22, RS-2 #20
BWO emerger #18, PMD nymph #18, dry-dropper Adams #18, small streamer in canyon
Caddis #16 (warmest days), Adams #18, soft hackle, Elk Hair Caddis #16
Seasonal hatch report
Fall — BWOs & Streamers
Cooling water wakes the fish up. Blue-Winged Olives return on grey afternoons, and pre-spawn browns chase streamers hard.
Sources & last updated
| Source | Feeds | Most recent update |
|---|---|---|
| USGS 06738000 | Big Thompson River | Sample data — no live reading |
| Hatchwise Seasonal Guide | Hatch & fly guidance | Jul 5, 12:00 PM MT · editorial |
| Kirk's Fly Shop | Shop fly report | Live — see report |
| St. Peter's Fly Shop | Shop fly report | Live — see report |
| Rocky Mountain Anglers | Shop fly report | Live — see report |
Live flow & water temp come straight from the USGS Instantaneous Values service; timestamps are the gauge's own reading times (Mountain Time).