Population Forecasts

Forecast Year:

Long-term population trend forecasts for trout species based on monitoring data from Montana Fish, Wildlife & Parks and U.S. Geological Survey (USGS) streamgage data. Forecasts predict whether populations will increase, remain stable, or decline relative to the past 1, 5, or 10 years. More about how it works.

Click on a marker to view detailed population status, probability distributions, historical trends, and relationships between abundance and summer flows.