Illustrated trout stream with green algae mats, a warning post, and a clean backup-water path

18 practical, source-backed guides

Learn to read the day.

Choose a question, understand the conditions, and make a better plan before you reach the river.

Start with a problem
Flow · Weather · Access · Safety · TacticsOr check a river report

Start with your question

What are you trying to solve?

Illustrated trout stream with green algae mats, a warning post, and a clean backup-water path

Newest field guide · 10 min read

A green, scummy, smelly, or posted bloom is not just a fly-choice problem. Treat it as a health, pet, and conservation stop sign.

01

A HAB advisory overrides a good flow, fishability score, hatch, or short drive.

02

You cannot prove a blue-green bloom is safe by sight; toxins may be present even when signs are unclear.

03

Fishing risk is not only catching fish. Wading, handling wet gear, dogs, keeping fish, and touching scum all change the decision.

Read the guide

All guides

Practical answers, organized by decision.

Every guide is built to help with a real on-water choice—not simply explain a topic.

Put the guidance to work

Check the river before you go.

Find a river report