The starting point of Section 6 of the Hong Kong Trail is located at Quarry Gap, which sits at an elevation of over 300 m. This site was once home to the Taikoo Sanitarium. The sanitarium was built in 1892 by Butterfield & Swire to serve as a summer retreat for senior staff and their families from the Taikoo Sugar Refinery and dockyards. To facilitate access for employees and their families, Butterfield & Swire also constructed a cable car system that transported them from near the sugar refinery in Quarry Bay to the sanitarium. The sanitarium was later demolished in 1932. From the starting point, follow the forest track to Tai Tam Upper Reservoir. The beautiful scenery of the reservoir comes into view, with the azure waters contrasting against the lush surrounding hills, creating a tranquil and refreshing atmosphere. After the completion of Pok Fu Lam Reservoir, the demand for drinking water continued to grow. To meet this need, the government constructed several larger reservoirs between 1883 and 1917, including Tai Tam Upper Reservoir, Tai Tam Byewash Reservoir, Tai Tam Intermediate Reservoir, and Tai Tam Tuk Reservoir. From the main dam of Tai Tam Upper Reservoir, continue walking until you reach the junction of trails towards Wong Nai Chung Gap Road and Tai Tam Road, then continue in the direction of Tai Tam Road. Follow the forest track, passing by Tai Tam Byewash Reservoir and Tai Tam Barbecue Area Site 6, until you reach the junction of trails towards Tai Tam Road and Tai Tam Tuk Reservoir. Head towards Tai Tam Road and follow a shaded path for about 1.5 km until you reach Tai Tam Road, which marks the end of Section 6 of the Hong Kong Trail.

_{To facilitate the public in planning their hikes, the geographical information of the route, including the route map, starting point, endpoint, and elevation chart, has been saved in a "GPX" file. The public can download hiking-related applications on their smartphones or smart watches, then click on the following "GPX" file to import the relevant information, which serves as an aid for hiking. Please note that downloading "GPX" files may increase data usage, and the functions and content display may vary depending on the device and application used.}