The first leg of Aberdeen Nature Trail skirts along Lower Aberdeen Reservoir on a level path. Once privately owned by a papermill, the reservoir was surrendered to the government for modification as part of the Aberdeen Valley Water Scheme and came into use again in 1932. The nature trail overlooks fine vistas of the typhoon shelter in Aberdeen and affords glimpses of a catholic convent built in a blend of Chinese and Italian architectural styles, as well as the rich diversity of flora and fauna, including Sasagrass, an ingredient of 24 Herbs, Chinese Cane, which is used to wrap sticky rice dumplings, and Black Kite soaring overhead. Near the end of the trail there is an old-style rain gauge, a declared monument of Upper Aberdeen Reservoir, which is certainly not to be missed.

_{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.}