Boat on a slipway to a lake

A picture of a boat on a slipway captured on 127 format colour slide film.

The picture looks as if it was probably taken in the evening judging by the light, and the day looks cloudy although not cold if the clothes the people are wearing are an indication. I suspect this is on the shore of a lake somewhere, rather than the sea, and because it was taken on 127 this probably dates from the 1960s