Pha Daeng National Park (also known as Chiang Dao National Park) is located in the Chiang Mai Province of Northern Thailand. It was established in 2000 and covers an area of approximately 1,123 square kilometers. This park is named after the Pha Daeng mountain range, also known as the Chiang Dao mountain range, which includes Doi Chiang Dao, the third-highest peak in Thailand.

Pha Daeng National Park is known for its rich biodiversity and stunning landscapes. The area features rugged mountains, lush forests, and a variety of wildlife. It is popular for bird watching, with many rare and endemic species being spotted in the area. Additionally, the park contains several caves, hot springs, and waterfalls that attract visitors. Among the most famous caves is Chiang Dao Cave, which extends deep into the mountainside and is adorned with stalactites and stalagmites.

Trekking is a favorite activity in Pha Daeng National Park, with various trails available ranging from short walks to challenging hikes leading up to mountain summits. Some trails require a local guide due to the complexity of the terrain and to ensure the safety and preservation of the environment.

When planning a visit, it's essential to check for the latest information because park conditions, access rules, and available facilities might change over time. Moreover, please consider seasonal variations, as some trails or park sections might be closed during the rainy season due to hazardous conditions.