Question 1

When does the Trico hatch occur?

Accepted Answer

The Trico (Tricorythodes spp.) hatch runs from July through September across Eastern US rivers, with peak activity typically in August. Earlier on lower-elevation southern rivers, later on northern and high-elevation streams.

Question 2

What flies match the Trico hatch?

Accepted Answer

Standard Trico fly patterns include Trico Spinner #20-24, Trico Parachute #22, CDC Trico #22. Tiny black-bodied mayfly. The spinner fall — not the dun emergence — is the main event. Look for clouds of spinners over flat water at sunrise.

Question 3

What water temperature triggers the Trico hatch?

Accepted Answer

Trico emergence triggers at water temperatures of 60–75°F, with peak activity around 68°F. Read your thermometer, not your calendar.

Question 4

What time of day does the Trico hatch?

Accepted Answer

The Trico hatch typically emerges in the morning. Plan your fishing window around that — being on the water before the emergence starts is more important than being on the water early in general.

Trico

Best rivers for the Trico hatch

Other rivers with Trico activity

Get a notification when the Trico is on.