Big Thompson River

Latest Guide Report


Report by: Rachel Donati

Fished from 830 to 430, and started up in the meadows then went down into the canyon. Water temp started at about 50 then warmed up to about 63. We saw some action on a size 22 blooming but mostly nymphed all day. Size 26 emerging midges and size 28 tan String on A Hook worked for the meadows. Then in the canyon caddis nymph patterns worked well also 24 zebra midges.

FRA Guide Jacob Stockbrand

Guide Rating
Weather Experienced

Wind Conditions: Calm
Precipitation: None
Water Observations

Water Temperature:
Flow Level: CFS
Runoff? Clear

Big Thompson River Water Flow Graphs

About Big Thompson River Fly Fishing

Starting as a mere trickle on the east side of the Continental Divide, inside Rocky Mountain National Park, the Big Thompson flows from Forest Canyon Pass near the top of Trail Ridge Road through Forest Canyon. As small drainages offer additional snowmelt, the Big Thompson picks up volume, turning into one of Colorado’s finest streams.

The Big Thompson becomes fishable at Moraine Park in Rocky Mountain National Park, about six miles downstream of its headwaters. It’s there at Moraine Park, where the river splits into numerous braids and channels, that fisherman encounter the river’s first public access. Trails leading up and down the river from that point will lead you to great flyfishing experiences.

Moraine is a wide-open area, but the Big Thompson’s banks are lined with willows. It’s typical small stream conditions, and the river is filled with, you guessed it, brook, brown, and cutthroat trout in the 6- to 12-inch range. They’ll readily take a variety of general attractor flies.