While coming back home the three friends choose the road path why?

The men decided to take the train back because they just couoldn't stand the thought of being in the rain any longer. They talk about abandoning the boat, and they hesitate, but in the end, they hopped on a train.

We had deceived the boatman at Pangbourne.  We had not had the face to tell him that we were running away from the rain.  We had left the boat, and all it contained, in his charge, with instructions that it was to be ready for us at nine the next morning.  If, we said—if anything unforeseen should happen, preventing our return, we would write to him.