Based on the context and the answer, generate a question. 

Context: We headed that way by way of the Mass Pike and then south and into the Catskills , to which I had n't been before . Trees are just starting to turn so it was nearly all late - summer green . We got to the Resort in time for the evening dinner and then the bonfire and cup blessing , although it was rather nippy up in the mountains . And , well , it was a stretch to call it a bonfire .

Answer:

It is late summer and time for the leaves to change color for fall .



Why would the leaves on the trees be turning color ?