I am taking RER B or C from DeGualle and getting off at the St Michael-Notre Dam RER station and am told there is an underground passageway between that station and the Metro Cluny-Sorbonne station. Does anyone know of this station walkway. From Cluny I plan to walk to my Hotel at 7 rue Thenard. Only one smallish duffle bag. Thanks.

The RER B from CDG will take you to St Michel (cost 9.25€) from where you can connect via underground tunnel to the Cluny/Sarbonne station. If you want, you can continue along the M10 line to Maubert/Mutualité station. Keep your ticket until you exit the métro.

It's just as easy to walk in the street. Up the Bd. St. Michel (away from the river), left on the Bd. St. Germain and right on the rue Thénard.

The Hotel College de France's own website advises the street walk, just as <b>Michael</b> suggests.
It's a lovely hotel; have a wonderful visit!

You'll be in Paris--stay above ground whenever you can!

Of course, if you have problems with your sense of direction, using the connecting tunnel to Cluny will keep you going in the right direction at least that far.

I'd probably get out ASAP, also. But do whatever you want, just follow the signs if you do want to walk underground.