Never fished this system--if anyone has any experience to share I would be appreciative...
One of the TOUGHEST RIVERS (Results) to fish GTA TRIBS
I have found that ROE is King there.
NEVER had any luck with: Hardware, Pinkies .... even worms only produced Suckers during their spring run.
There are fish, just very tricky river to get to know.
Many a SKUNK DAY!
The mouth, marsh ....
Old mill down to Bloor and a bit futher hold some pools
Up north more (Season to Eglington) there are "Some areas" - lots of shallow water (Other than the weirs which are sanctioned)
In season, going all the way to Bolton produces small browns and specs.
If its close and convenient, fish it and enjoy your day!
However, not the number one choice if you have other options
Just my opinion