Dajia Lake
Dajia Lake is a high mountain lake at an elevation of 5.247m (17,214ft) above the sea level, located in the Shigatse Prefecture of the Tibet Autonomous Region of China.
The road to the lake is asphalted. It's called 206 Provincial Road (S206), a lonely road in the middle of nowhere. It stays for a long time very high (150km over 5000m above the sea level) over a long high plateau. The bigger problem than the condition of the road is extremely low oxygen for engine combustion.
The wind is usually quite strong at mountain areas. High winds blow here all year long. Even in summer you can confront with snowy days. Temperatures here in the winter are brutally cold. With such a high summit altitude the road can be closed anytime due to snowfalls. The zone is prone to heavy mist and can be dangerous in low visibility conditions.
Do not travel this road in severe weather conditions. Avalanches, heavy snowfalls and landslides can occur anytime, being extremely dangerous due to frequent patches of ice. It has a well-deserved reputation for being dangerous because of unpredictable snowstorms and blizzards, and driving under these conditions, can be extremely challenging. It is subject to winter snowfalls with such a high summit altitude, and the road can be closed anytime when the access is not cleared of snow.Do not take this drive if you have respiratory problems or any type of heart condition. Notorius lack of oxygen that tests the organisms and a high degree of steepness. Most people feel altitude sickness at around 2,500-2,800 meters. Extremely low oxygen for engine combustion. A major hazard of altitude is the sickness that can indiscriminately affect anyone regardless of age or fitness. The summit has about 40% less oxygen than at sea level, thus breathing is more difficult. Your pulse rate will increase and movement will be more laborious at the summit. The high elevation with its risk of altitude sickness, weather concerns, steep road grade, and overall inaccessibility make the pass dangerous and summit trips difficult.
Pic: By V.Steuer (Own work) [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons