Doi Langka Luang (ดอยลังกาหลวง) is also known as Doi Mae Tho (ดอยแม่โถ) in north Thailand. This is the highest peak of the Khun Tan range, and lies near the junction of the Chiang Mai, Chiang Rai and Lampang provinces, at the southern tip of the Khun Chae national park. At 2031m above sea level, it is about the 8th highest mountain in Thailand.

We did this hike independently in 2 days. It is not a well-known route and we did not see anyone for the whole route. The night before at the Baan Kon Meuang Doi homestay in the village of Baan Mae Dtoon Luang. The village chief drove us to the start of the hike at "Doi Radar", near the Khun Chae national park headquarters. Our first day route took us over Doi Pha Ngom before camping right on the summit of Doi Langka Luang. Our second day route took us over Doi Langka Noi and back down to Baan Mae Dtoon Luang.

We carried 8 litres of water for 2 people but started to get low during the 2nd day and were very relieved to find a stream part-way through the 2nd day.

This trek could probably also be arranged through the Khun Chae national park headquarters or commercial trekking companies with a guide/porter, possibly taking longer and using the main campsite featured in the video.

My video of the trip is at https://www.youtube.com/watch?v=E3klOcK0jhU