Doi Inthanon in Chiang Mai

Doi Inthanon National Park: The Roof of Thailand

Doi Inthanon, one of Thailand’s most popular national parks, is renowned for its stunning waterfalls, scenic viewpoints, remote hill tribe villages, and a few well-marked trails. Located about 70 km southwest of Chiang Mai city center, the park is a favorite destination for nature lovers, birdwatchers, and those seeking sunrise or sunset views above the clouds.

Known as "The Roof of Thailand", Doi Inthanon National Park spans 482 km² in Chiang Mai province and forms part of the Himalayan mountain range. Elevations in the park range from 800 to 2,565 meters above sea level, with Doi Inthanon Mountain being the highest point in Thailand.

Thanks to its high elevation, the park enjoys cool temperatures and high humidity year-round, offering a refreshing escape from the tropical heat below.

History and Etymology of Doi Inthanon

Established in 1972 as Thailand’s sixth national park, Doi Inthanon National Park spans an area of 482 square kilometers. It encompasses parts of the Chom Thong, Mae Chaem, Mae Wang, and Doi Lo Minor Districts within Chiang Mai Province.

The mountain now known as Doi Inthanon was originally called “Doi Luang” or “Doi Ang Ka.” In the local northern Thai dialect, Doi Luang means “large mountain,” a name used by villagers who lived in its shadow.

The name Doi Ang Ka has a distinct origin and meaning. Ang Ka refers to a swampy basin-shaped pond located approximately 300 meters west of the summit, where crows (“ka” in Thai) were often seen bathing—thus the name Ang Ka, meaning "Crow’s Pond." However, the word Ang Ka is also believed to come from the Paganyaw (Karen) language, where it means “big” (yai in Thai). Therefore, Doi Ang Ka also translates to “big mountain” in the Karen context.

Today, the mountain is officially named Doi Inthanon, in honor of King Inthawichayanon, one of the last kings of Chiang Mai, who was passionate about forest conservation and wished to preserve the mountain's beauty.

Climate of Doi Inthanon National Park

Doi Inthanon National Park’s climate is shaped by two major monsoon systems:

• The Southwest Monsoon (May–October): Brings moisture and rain clouds from the Indian Ocean, marking the rainy season.

• The Northeast Monsoon (November–February): Originating from China, it brings cool and dry air, contributing to cold winters.

As a result, the park experiences three distinct seasons:

• Summer: March to May

• Rainy Season: June to November

• Winter: December to February

Altitude-Based Climate Zones

Due to the park's wide elevation range—from 800 to 2,565 meters above sea level—its climate varies significantly by altitude:

• Below 1,000 meters:

  • Tropical climate

  • Warm and humid with typical lowland forest conditions

• 1,000–2,000 meters:

  • Subtropical climate

  • Cooler temperatures with increased humidity

• Above 2,000 meters:

  • Temperate climate

  • Cool to cold year-round with frequent cloud and fog cover

Summit Conditions (Doi Inthanon Peak)

• Wet and cold all year

• The summit often experiences gale-force winds and temperatures near or below freezing, especially in December and January

• Frost is common during the coldest months, with temperatures dipping to 0–4°C

Central and Highland Regions

• Average annual temperature: ~20°C

• Winter temperatures (Dec–Jan): 15–17°C

• Annual rainfall: 2,000–2,100 mm

• Above 1,800 meters:

  • Frequently shrouded in clouds and fog

  • Cool and wet microclimate due to persistent low cloud cover

This diverse climate makes Doi Inthanon a unique ecological zone, supporting rich biodiversity and distinct forest types from tropical to cloud forest. Let me know if you'd like a visual climate chart or infographic to go with this!