Stage 11, Avranches / Mont-Saint-Michel (TT)
10 July
Attempting to reach the World Heritage Site, Mont Saint-Michel, by any other route than the tidal causeway isn’t advisable. Tourists have drowned after being cut off by the tide, and the deep mud surrounding the island can be treacherous, not dissimilar to quicksand.
Carbon Addiction 
I’m bringing my family over there in September think i’ll take your advice and take the causeway.