臺北自來水園區環境教育中心

小觀音山標高45.5公尺，主要由三個山丘所組成，因南麓「寶藏巖」廟供奉觀音而得名。由於臨新店溪畔形成天然邊界，早年是臺北盆地南區邊陲自衛據點，設置鼓亭作為瞭望警示之用。因一直被劃為軍事管制區，開發少，且水資源豐富，山區保存了極自然的生態體系，是臺北地區除芝山岩外，另一處保有原生林相的稀有林區。
由自來水博物館旁之登山入口沿木棧道進入，途經消壓塔、觀景平臺、管材雕塑區。沿著水園區的車道往上從右側進入石梯，途經涼亭、小觀音山蓄水池。環山一周，全程約600公尺，步行約30分鐘，林間氣候涼爽宜人，能觀賞多樣繁盛的動植物。
The Little Mt. Guanyin (Little Guanyinshan) is 45.5m high, and consists of three main hills. The name "Guanyin" is from the Guanyin Bodhisattva enshrined and worshipped in the Baozangyan Temple at the foot of the southern hill. Since the Xindianxi flowing alongside forms a natural border, in days of old Guanyinshan served as a self-defense stronghold on the southern frontier area of the Taipei Basin. A drum pavilion was built for use as a lookout and for the sounding of alarms. Due to the fact that the mountain has in recent times been a military control zone, the lack of development and rich water resources have enabled the preservation of a predominantly natural ecological system, which is, beside Zhishanyan, Taipei's another rare forest displaying an indigenous forest form.
Entering from the hiking trail beside the Museum of Drinking Water, the footway goes through the Pressure Relief Tower, a sightseeing platform, , and the Pipe Sculpture Area, or ascending alongside the driveway of the Water Park then turning right to the stone stairwell. The latter route goes through a pavilion and the Guanyinshan Reservior. It takes about 30 minutes on foot to circle the mountain – approximately 600m. The climate is usually cool and pleasant, and there are a variety of animals and plants to be seen.