August Fishing on the Bighorn River

SEASONAL GUIDE

What to expect in August

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.

Flows are commonly lower than in early summer. Watch changes in water temperature, weeds and afternoon wind as you plan the day.

01

What usually hatches

Tricos
Black and tan caddis
PMDs
Hoppers and ants

02

How to fish it

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

03

How to rig

Start 6–9 feet deep with less shot than in early summer. Shorten the spacing between flies and check them often for weeds.

STARTING FLY BOX

Carry these patterns.

Sizes are starting points. Match the insects and water in front of you.

Trico spinner #20–24Black caddis #14–18Tan caddis #14–18Pheasant tail #18–20Split-case PMD #18–20Ray Charles #16–18Foam hopper #8–12

PACKING LIST

What to bring

Trico box
Caddis emergers
Terrestrials
Weed-clearing tool
Sun and wind protection

KEEP IN MIND

Before you head out

Check the actual water temperature. Warm air alone does not tell you how warm the tailwater is.

Launch early if you want to fish the morning activity. Leave extra time for afternoon wind, which can slow the float considerably.

August fishing on the Bighorn.