Dragsum Tsho (Tibetan: བྲག་གསུམ་མཚོ་, Wylie: brag gsum mtsho, THL: Draksum Tso, Pagsum Co (simplified Chinese: 八松错, 巴松措; traditional Chinese: 八松錯; pinyin: Bāsōng Cuò), literally meaning “three rocks” in Tibetan,[1] is a lake covering 28 square kilometres in Gongbo'gyamda County, Nyingchi of the Tibet Autonomous Region, China, approximately 300 km (190 mi) east of Lhasa.

[2] Surrounded by dense primary forests of fir, spruce, and rhododendron, the lake hosts 195 native animal species and 242 phytoplankton varieties, including endemic fish like the naked carp (Gymnocypris spp.

The northwestern shore features a 5 m² sacred boulder with a central perforation, believed to cleanse sins and cure illnesses through ritual passage.

The 7th-century Tsodzong Monastery on Drowa Island (Chinese: 扎西岛) exemplifies Nyingma school architecture, dedicated to Padmasambhava and adorned with ancient carvings of the deity Hayagriva.

[5] Annually on the 15th day of the fourth Tibetan month, pilgrims circumambulate the lake, tracing routes marked by King Gesar’s legendary arrow strikes and hoofprints of his warhorse embedded in shoreline rocks.