Put In

Put on below Croton dam. Best launch if from the furthest parking lot. Trail leads to gauging station. 
Nice wave under bridge at higher levels though you usually have to carry to get to it. 
Class I section, trees and blow-downs in the river are only hazards. Can go either side of various islands.

Rangers and maintenence people aren't all to keen on paddlers and the mile below the dam to Black Rock is class 1 next to a busy road, so during nicer weather especially on weekends launch further down. You won't miss any good whitewater. 

That being said, the dam is spectacular.