Starting from the entrance of Aberdeen Country Park, pass through a morning walker garden before reaching the Aberdeen Lower Reservoir. The Aberdeen Reservoirs, consisting of the Upper Reservoir (constructed in 1931) and the Lower Reservoir (constructed in 1932), were constructed to increase water storage capacity for the western part of Hong Kong Island, addressing the issue of water shortage. This was the fourth and final reservoir built on Hong Kong Island, following the Pok Fu Lam Reservoir, Tai Tam Reservoirs and Wong Nai Chung Reservoir. Strolling along the stone bridge atop the dam leads you to the entrance of the Aberdeen Nature Trail. Walking along the nature trail, you can listen to the sounds of insects and birds while enjoying the views of the Aberdeen Typhoon Shelter. After passing a barbecue area, walk along the dam of the Aberdeen Upper Reservoir to the other side, where you can enjoy a side view of the majestic dam. The dam, which is a declared monument, is a concrete gravity dam paved with pre-cast concrete blocks with a reticulated surface. Finally, pass through a shaded path and the journey concludes at the junction leading to Wan Chai Gap or the Aberdeen Upper Reservoir. You may continue to the second half of the Aberdeen Reservoirs Walk towards Wan Chai Gap.

_{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.}