The Runcorn Arm?

Yes keep going this way, when you hit the bridge you're at the end...

Busiest day of the trip so far. A flotilla of boats coming toward us up the Runcorn Arm, maybe 15 boats, all local, all doing a charity event. #loveboaters

Then it was on through the Preston Brook tunnel and back on the Trent and Mersey - a proper canal!