RiverFinn
How it works
Four sources, read together, before you drive.
RiverFinn does not guess at a river. It reads the instruments that are actually on it, the forecast for that spot, the agency's own notices and rules, and puts them on one screen. Finn explains what they add up to.
RiverFinn reads the gauges
Every few minutes RiverFinn checks the USGS and Colorado DWR stations attached to each reach: discharge, and water temperature where a thermometer exists. Each reading keeps its observation time.
It layers on the rest
The National Weather Service forecast for the reach, the state agency's closures and advisories, and the standing regulations for that stretch — flies-only, catch-and-release, seasons.
It scores what it can
Where enough of the inputs are measured, a Conditions Score compares them with what the reach's species prefer. Where they are not, RiverFinn shows the measurements it has and says what is missing.
You decide, with Finn
Save the rivers you fish, ask Finn what the numbers mean for Saturday, plan the trip, and get an alert when a closure appears or the flow moves.
What RiverFinn will not do
- Show a water temperature for a reach that has no thermometer.
- Give a score when too little is measured to deserve one.
- Let a good number outrank a closure. Closed says closed, everywhere.
- Have Finn invent a hatch, a flow or a rule that RiverFinn did not record.
See it on your rivers.
Free to start, with two full waters in every supported state.