Bighorn River Fishing Report

HISTORICAL REPORT

This is a look back at a past period. The readings and reported flies below are historical; the fishing suggestions describe the usual seasonal approach.

LOWER FLOW

Seasonal fishing advice

An early start helps in August. Tricos, caddis and terrestrials each offer chances during the day, while weeds and wind make it worth checking your flies and boat position often.

Readings from this period

The median flow in reports from around this date was 1,530 cfs, with reported readings from 1,500 to 1,600 cfs. The median reported water temperature was about 55.0°F.

HATCHES

Listed for this period

PMD
caddis
Trico
tan caddis
midge
Hopper

FLIES

Reported patterns

Pheasant Tail
Tailwater Sowbug
Carpet Bug
Sowbug
Scud
Zebra Midge
Perdigon
Squirmy Worm
San Juan
Afternoon Caddis

TACTICS

Seasonal suggestions

Pick an individual Trico feeder and work on a drag-free drift
Use a shorter, compact nymph rig around heavy weeds
Fish terrestrials close to grassy banks when the wind helps

RIGGING START

A seasonal rig to start with

Start with roughly 6–8 feet from indicator to weight, a smaller indicator and light shot. Keep the cast quiet and try less weight before making a large change to leader length.

Use this dated report to compare past fishing with your trip. Before heading out, check the current flow, water temperature and hatch activity.

Compare with live conditions

Bighorn River Fishing Report — August 20, 2026