For this excursion the train trip from Sydney's Central station to Lawson in the Blue Mountains, took about 1hr 45mins. This walk started beyond the Swimming Centre at the end of St Bernard's Drive, on the northern side of Lawson station.
The north Lawson walking tracks are quite rough in places, but it is a very pleasant walk even on a cloudy day, as you can see from the photos. The bush walk we did was 7Km, but this will vary depending on the route taken. If you would like a short walk just walk to 'Fairy Falls' and return the same way.
Most of the walking group I was with had a coffee or hot chocolate at this cafe before catching the train home. (It's behind the shops in Honour Ave)