Mae Sa Waterfall: ten cascades in Mae Rim’s forest landscape

Mae Sa Waterfall is a sequence of ten cascades in Mae Raem, Mae Rim district, northwest of Chiang Mai. The stream descends through wooded foothills, spreading over broad rock shelves and gathering in pools between the drops. Large trees shade the water, making the forest canopy as much a part of the landscape as the falls themselves.

A waterfall in ten parts

Mae Sa’s character comes from the changing shape of the stream along its descent. The first cascade, Pha Lat, spreads across a broad, sloping rock surface. Farther upstream, the fourth, Wang Sam Muen, has a low cascade beside an open bank. Their wide profiles contrast with the narrower channels elsewhere along the watercourse.

Each tier has its own name. Among them are Wang Yao, the second cascade, Phana Rom, the seventh, and Lan The, the tenth and uppermost. The numbering describes successive features along the same stream: Mae Sa is a chain of falls separated by stretches of flowing water, rather than one continuous vertical drop.

Granite, headwaters and woodland

The stream has its headwaters on Doi Sang and runs over granite as it descends the foothills. It flows throughout the year, with a smaller volume in the dry season. Seasonal changes in the water alter the appearance of the cascades, from thinner flows over the rock surfaces to fuller falls after rain.

The surrounding vegetation includes both dry dipterocarp and mixed deciduous woodland. Teak grows among the mixed deciduous trees, alongside several kinds of bamboo. The dipterocarp component includes teng and rang, the trees that give this forest type its Thai name, pa teng rang. Together, these woods form the setting for a stream that carries water from the hills towards Mae Rim’s cultivated lowlands.

Protecting the waterfall and its catchment

Mae Sa lies within Doi Suthep–Pui National Park. The park was established in 1981, and an expansion on 26 September 1982 brought Mae Sa and other waterfalls, together with surrounding headwater forests, into the protected area. The boundary change linked the cascades with the wooded slopes supplying their water, treating the waterfall and its catchment as parts of the same landscape.

Water for Dara Rasmi’s gardens

Mae Sa also belongs to the agricultural history of Mae Rim. Princess Dara Rasmi developed Suan Chao Sabai as a place for experimenting with local and imported plants. Crops included asparagus, beetroot, carrots and apples; seed and planting material were propagated for other growers. Flowers also had an important place in the garden, especially roses, which she cultivated and bred herself.

Irrigation channels carried water from Mae Sa Waterfall through villages and rice fields to Suan Chao Sabai and neighbouring land. Farmers shared the supply. This connection gives the waterfall a significance beyond its scenery: water descending through the forest supported horticultural experiments and cultivation farther downstream.

A local naming tradition offers a more everyday association. It connects Mae Sa with Mae Sao, referring to young women who bathed in the clear stream, and says that the pronunciation changed over time. This is a traditional explanation of the name, linking the watercourse with the people who lived along it.