Is the Blue Mountains worth a day trip from Sydney?
The Blue Mountains are worth it if you want cliffs, bushwalks and a cooler break from the city. A day trip works, but an overnight gives more room for weather, walks and less platform-to-lookout rushing.
Answer
As a Sydney day trip, the Blue Mountains can give a clean change of air: eucalyptus valleys, lookouts, short walks and a pause from the harbour. The weak version is trying to squeeze it into an already packed city plan or expecting one lookout to carry the whole day. Staying overnight lets you choose walks by weather, see the towns after the day-trip rush, and avoid treating the mountains as a commuter errand. Check conditions before making it the hinge of the trip.