Its approach is by a hard three days of trekking from Lukla. However, considering acclimatization needs for the high altitude climbing, a four-day trek is generally preferred. This trail crosses initially the Dudh Kosi () river and a further climb leads to the Tengboche monastery at altitude. A downhill trek leads to Devouche, the nunnery. The backdrop to the monastery is provided, particularly during winter, by the shining snow clad peak of Ama Dablam, the tip of the Everest that glows from the Lotse ridge and several other peaks. Tengboche is the mid-way station of the trail to the base camp for the climbers of Mount Everest and other peaks of over ; all these areas form part of the entire Kumbhu region up to Tibet border with an area of encompassing the Sagarmatha National park. In the Kumbu region of Nepal, the monastery is strategically placed on the way to Everest base camp and thus attracts large number of tourists from all parts of the world. During the spring season, hill slopes around Tengboche are covered with flowering rhododendrons.