The Royal Agricultural Station Inthanon is a significant highland temperate plant research station under the Royal Project Foundation, situated on Doi Inthanon, the highest mountain in Thailand. It serves as a vital hub for researching, collecting, and producing various species of temperate flowers and ornamental plants. Additionally, the station cultivates herbs and small temperate fruits distributed under the Doi Kham brand and operates a unique Rainbow Trout fishery. Beyond its botanical wonders, the area is rich in local wisdom and traditions, such as the Karen terraced rice fields, the "Gin Wo" New Year festival of the Hmong at Ban Khun Klang, and various eco-tourism activities including birdwatching and stargazing. Located in Khun Klang Village, the project takes responsibility for promoting sustainable agricultural careers for the local Karen and Hmong communities.

Operations began in February 1979, following the Royal wish of His Majesty King Bhumibol Adulyadej the Great to assist hill tribe people in securing permanent settlements. The project aimed to promote the cultivation of substitute crops for opium, providing modern agricultural knowledge to increase yields. This shift in income significantly improved the quality of life for Thai highlanders while simultaneously preventing the destruction of watershed forests. By encouraging farmers to abandon shifting cultivation in favor of permanent agricultural sites, the ecosystem was preserved. Later, in April 1984, the Khun Huay Haeng Research Unit was established about 3 kilometers from the main station to focus specifically on the research and production of temperate and sub-tropical fruits and various field crops.

Interesting Attractions within the Station:

• Agro-Eco Tourism: Experience a comprehensive high-altitude agricultural lifestyle that transformed former shifting cultivation areas into a model for sustainable "Precision Agriculture." Visitors can learn about natural resource management and eco-friendly temperate farming methods under the Royal Project Foundation.

• Siri Phum Waterfall Nature Trail: A short nature trail leading to a majestic pair of waterfalls cascading down steep cliffs. Surrounded by fern gardens and ancient forest flora, the atmosphere is tranquil and misty, perfect for immersing oneself in the richness of the hill evergreen forest ecosystem.

• Birdwatching: With its fertile forests and high biodiversity, the station is a sanctuary for both resident and rare migratory birds. Birdwatchers often visit to observe colorful species such as the Green-tailed Sunbird and the Grey Bushchat, which frequently appear among the flowering shrubs within the station.

• Temperate Vegetable & Research Plots: Marvel at greenhouses equipped with modern agricultural technology, including hydroponic systems and economic crop research. These plots feature crops like Iceberg Lettuce, Cape Gooseberry, and Strawberries, showcasing the success of adapting temperate species to thrive in Thailand.

• Rhododendron Garden: A collection of various Rhododendron species (Rose of the Thousand Years) from both domestic and international origins. These bloom with a delicate fragrance during winter in a meticulously designed rock garden, reflecting the beauty of rare flora found only at high-altitude, cold-climate locations.

• Private Car: From Chiang Mai city, take Highway 108 (Chiang Mai–Hot). Upon reaching Chom Thong, turn right onto Highway 1009 towards Doi Inthanon. At KM 31, turn right into Ban Khun Klang; the station is located within the village.

• Public Transport: Take a yellow songthaew at Chiang Mai Gate to Chom Thong, then transfer to an Inthanon-bound songthaew and disembark at the front of the station or Khun Klang Village.

• Additional Info: The ascent is quite steep with many sharp curves. Ensure your vehicle is in good condition and drive with caution.

• Best Time to Visit: December to February is highly recommended as temperate flowers are in full bloom, and there is a chance to see the Himalayan Cherry (Nang Phaya Sua Krong) in nearby areas.

• Educational Groups: Groups seeking academic lectures on agriculture should contact the station office in writing in advance.

• Food and Products: Don't miss the chance to taste fresh Rainbow Trout and Royal Project vegetable dishes at the station’s restaurant, and shop for fresh produce at the local hill tribe market.

• Attire: Due to the high altitude, the weather is cool year-round. Even in summer, it is advisable to bring a light jacket.

• Accommodation: The station provides Royal Project lodging, but it is recommended to book at least 1-2 months in advance during the peak season.

Admission Fee:

• Thai and Foreign Visitors: 20 THB per person.

• Note: Admission rates are subject to change according to the Royal Project Foundation’s announcements.

Opening Hours:

• Daily: 08:00 – 18:00