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Dong Mo Lake (Hồ Đồng Mô)

Dong Mo Lake (Hồ Đồng Mô), also known as Dong Mo – Ngai Son, stands tall as the largest irrigation reservoir in Hanoi, boasting a massive capacity of 61.9 million m³ and sprawling across approximately 1,400 hectares. 

Nestled within Son Tay town, this reservoir has become a premier tourist destination, celebrated for its diverse natural landscapes, rich biological resources, and historical significance. 

It is no wonder that Dong Mo is among the top three tourist spots in Son Tay town, earning a spot in the esteemed Wetland Landscape Protection Planning group.

Location and Access

Situated predominantly within three communes—Kim Son, Son Dong, and Co Dong—in Son Tay town, with a small section belonging to Yen Bai commune, Ba Vi district, Dong Mo Lake sits about 50 km west of Hanoi’s city center. 

Travelers can easily access Dong Mo via Thang Long Avenue to Hoa Lac intersection and Highway 32 to Son Tay intersection. 

Both routes offer scenic views and a smooth journey to this natural wonder.


Dong Mo’s terrain is a captivating blend of semi-mountainous regions transitioning from high mountains to plains, characterized by low “bowl-shaped” hills and a network of small rivers and streams. 

Its transformation from streams flowing from Ba Vi Mountain and Vien Nam Mountain to an irrigation lake in the 1960s reshaped the landscape, creating what we now know as Dong Mo Lake.


Nestled in the embrace of Ba Vi Mountain, Dong Mo enjoys a unique “microclimate,” offering up to 1,881 hours of sunshine annually, significantly higher than central Hanoi’s Lang measuring station. 

Additionally, occasional Lao winds add a touch of hot, dry air, making Dong Mo a pleasant destination for travelers seeking favorable weather conditions.

History and Archeology

Steeped in history, Dong Mo – Hoa Lac’s area traces its roots back to the Cam Khe base, which is linked to the Hai Ba Trung uprising. 

Folklore even suggests that Dong Mo is a relic of the epic battle between Son Tinh and Thuy Tinh, adding an enchanting layer to its historical narrative. 

Archeologically rich, areas around the lake have yielded Paleolithic and early metal artifacts from the Son Vi Culture, dating back at least 4–5,000 years. 

Excavations have uncovered relics, ceramics, and porcelain cans from the 12th to 16th centuries, offering a glimpse into Vietnam’s ancient past.

Construction and Conservation

The construction of Dong Mo Lake from 1969 to 1974 marked a significant engineering feat, serving irrigation needs for about 12,000 hectares of cultivated land. 

Despite signs of deterioration over the years, efforts to protect Dong Mo’s biodiversity, including the critically endangered Hoan Kiem turtle, have been ongoing. 

Collaborative conservation programs aim to preserve Dong Mo’s rich ecosystem for generations.

Wildlife and Recreation

Dong Mo Lake’s biodiversity is a treasure trove, hosting 21 islands and various flora and fauna, including 35 fish species. 

Conservation efforts have been instrumental in protecting native species and mitigating the impact of invasive species. 

The beautiful area also offers recreational activities such as fishing, golfing at Kings Island Golf Resort, and exploring ethnic architectural wonders at the Vietnam Ethnic Culture and Tourism Village.


Dong Mo Lake is a testament to nature’s beauty and human ingenuity, offering a glimpse into Hanoi’s rich history and vibrant ecosystem. 

Whether you seek a leisurely retreat or an adventure-filled getaway, Dong Mo promises an unforgettable experience, beckoning travelers to explore its scenic landscapes and cultural heritage.

Plan your visit today and discover the wonders of Dong Mo!

Dong Mo Lake (Hồ Đồng Mô)
Dong Mo Lake Overview
LocationSon Tay town, Hanoi
Capacity61.9 million m³
AreaApproximately 1,400 hectares
Main Attractions
  • Kings Island Golf Resort
  • Vietnam Ethnic Culture and Tourism Village
  • Long Ho Village
  • Phan Thi Villa
  • Thang Long Avenue to Hoa Lac intersection
  • Highway 32 to Son Tay intersection
ClimateUnique “microclimate” with ample sunshine
HistorySteeped in historical significance
ArcheologyRich in Paleolithic and early metal artifacts
ConservationEfforts to protect biodiversity and endangered species
RecreationFishing, golfing, and exploring ethnic architectural wonders


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