Keith, I trap beaverwhenever I have open water.
Now this may be the end of October ,and into December.Also,whenever ice goes out in the spring.This may be march or april,and run till mid may.If I am trapping in the north and we have a late spring,I take the beaver as long as they remain good--which could be well into May.
The part I like about spring beaver,is I can concentrate on just one animal.
Tom