The one issue I see with this is who owns the land.
If it belongs to the city I doubt there will be any issue but if it belongs to the railway then it might be an issue, I think the railway police are a lot more aggressive at going after trespassers (not sure if the forested part is owned by the same entity as the Turcotte yards or if the Turcotte yards still belong to the railway).
Of course if the entrance/exit to the trail is well hidden and nobody talks about it on a public internet forum...
