What is considered a more accurate predictor of viable Kokanee habitat than the state line?

Answer

Deep bathymetry of the water body

The geographic distribution is less about latitude or state lines and more about the morphometry of the water body; deep bathymetry correlates directly with the likelihood of sustaining a thermal refuge layer.

What is considered a more accurate predictor of viable Kokanee habitat than the state line?
locationhabitatfishkokaneesalmon