Tung-O Ancient Trail is one of the most important trails on Lantau Island (~13.5km), from Tung Chung, along the coast to Tai O via a large number of villages such as San Tau, Sha Lo Wan, Sham Shek and Sham Wat.
If you are an experienced hiker, you can arrive Tai O within 3 hours. For amateur, 4-5 hours may required.
The cache is not along the path, it is about 30 meters at the left hand side of the path if you are heading to Tai O. You have to walk up a bit, but no climbing is required.
A Red Cross Mini Calculator for FTF.