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Long Tieng
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Long Tieng, situated in a remote karst valley in Xaisomboun Province, was the epicenter of the CIA's 'Secret War' in Laos. Between 1962 and 1975, this covert military base expanded to around 40,000 residents, briefly making it the second-largest city in the country, even though it appeared on no official maps. Under the leadership of General Vang Pao, Long Tieng served as the headquarters for the Hmong guerrilla army and as a hub for 'Air America' flights providing logistical support. Following the American withdrawal in 1975, the base was overtaken by communist forces and remained a highly restricted military zone for decades. Only recently has this isolated valley been slowly opened up for civilian development.
- Location: Laos
- Nearby: Xaisomboun (18 km)
Best time to visit & climate
The most pleasant time to visit is Feb, Mar, Nov.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 17 | 20 | 22 | 25 | 25 | 24 | 23 | 23 | 23 | 21 | 19 | 17 |
| Rain mm | 9 | 9 | 31 | 57 | 143 | 141 | 207 | 242 | 162 | 69 | 20 | 7 |
📋 Practical info
Visiting
Long Tieng is a remote site with limited tourist infrastructure; visits require permission and a guide. The area is now a small town.
Typical hours
No fixed hours; access is controlled. Arrange a tour from Vang Vieng or Luang Prabang in advance.
Photography
Photography is generally allowed, but avoid military or restricted areas. The valley and old airstrip are notable.
Time needed
A full day trip from Vang Vieng, including travel. Allow 2-3 hours at the site itself.
Combine with
Combine with a visit to the Plain of Jars or Tham Chang cave in Vang Vieng. The area has scenic landscapes.
Getting there
Reachable only by road from Vang Vieng (about 3 hours) with a 4x4. Local guides are essential for navigation.
Insider tip
Bring your own food and water as facilities are minimal. Learn about the Secret War history beforehand for a richer experience.
Geography
Facts
- Served as the CIA headquarters during the 'Secret War'
- Briefly became the second-largest city in all of Laos
- Completely absent from all official maps of the era
- Command center for the Hmong guerrilla army under Vang Pao
- Crucial logistical hub for covert Air America supply flights
- Remained a highly restricted military zone for decades post-1975
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
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Sights nearby
Frequently asked questions
What was Long Tieng during the war?
It was the headquarters for CIA operations in Laos and at one time one of the busiest airports in the world.
Why was it called the 'most secret place on Earth'?
The existence of the base was not officially acknowledged during the conflict, and it did not appear on any maps.
Who was General Vang Pao?
The leader of the Hmong army who coordinated the resistance against the Pathet Lao from Long Tieng.
Can Long Tieng be visited today?
Access is possible today, but the area remains sensitive and often requires special permits for foreigners.
What is left of the original base?
The airstrip, some administrative buildings, and Vang Pao's residence are still partially preserved.
Long Tieng: where is it located?
Long Tieng is located in Laos.
Long Tieng: when is the best time to visit?
The most pleasant time to visit is Feb, Mar, Nov.
Long Tieng: why is it worth visiting?
Long Tieng, situated in a remote karst valley in Xaisomboun Province, was the epicenter of the CIA's 'Secret War' in Laos.
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