Once again,
https://map.railfans.ca/ is your friend (under the STO tab in the layers menu). The map shows both the underground alignment under Sparks Street, and the surface alignment down Wellington.
There is also this updated official map with new station placements. If there's any inconsistency between this map and the one on RFC, this one is more up to date and correct. Note that the short section between Chaudiere and Begin is an off-street former rail row, whilst the rest of this is on (or under) city streets.
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