What a lovely place you have there.
Muskrat don't set up where there is not easy access
to good food. Apple trees, cat tails, and lots of good
roots to eat under the ice. They need to breath air so
their paths are not very deep in the shore edge 3 feet max.
It will look like a cow path. If you have a number of them
you will see them early morning. Only dive under if they
are spooked or need to duck under a stick.
Those holes are not muskrat. It is rare for them to have another
hole out on top of the bank.
Cheers Don.
EDIT: forgot to add that if their is abundant food you
will have a hard time catching your fish.
Last edited by DonoBBD; 12/09/15 09:59 AM.