Oh, now I see where it is going, after looking at another map - that PDF map was hard to see whre the trail was going to - but if the portage was thre, yeah it would take you to the Pick Narrows

MNCanoeing map - nothing there

Toporama - canadian topo maps - nothing there (though this one didn't show the current ptg from Nym to Batch either)

Ontario Basic Mapping - nothing there, and OBM usually shows even very old portages or logging roads not used any more

so my bet is that it isn't there - I'll see what Chrismar map shows later.