Things to Do in Sangkhlaburi in May

The reservoir around Sangkhlaburi holds near its lowest annual levels in May. The upper chedi and partial walls of Wat Sam Prasob, the Mon temple submerged when the dam flooded this valley decades ago, pierce the waterline in full relief. A longboat from the pier near the Mon Bridge reaches the ruins in about twenty minutes. Departing at 6 AM puts you on glass-flat water while the air still sits at a manageable 25°C (77°F). The light at that hour catches wet stone and turns the reservoir from black to jade as the sun clears the eastern ridge. The silence is total except for the put-put of the engine and the occasional kingfisher dropping off a dead branch into the shallows. By mid-morning the heat makes the open boat unbearable. This is an early-start-or-skip proposition. You might share the ruins with one other boat in May. In December you would share them with twenty.

Crossing the Uttamanusorn Bridge at first light puts you in step with Mon monks in saffron robes heading to collect morning alms on the Thai side. Thailand's longest handmade wooden bridge stretches roughly 400 metres (1,312 feet) over the reservoir on hand-hewn teak pylons. The planks creak underfoot in a rhythm that changes with the weather. The water below shifts between green and slate depending on cloud cover. The smell of woodsmoke from the Mon settlement reaches you before you set foot on the far bank. The village operates at a different pitch from the Thai side. Mon script on the signs. A tonal language distinct from Thai spoken in the market stalls. Hand-loomed textiles drying on bamboo racks outside raised wooden houses. In May's quiet, you will likely be the only outside visitor in the settlement. The food stalls near the monastery serve Mon-style kanom jeen without the crowd that descends on cool-season weekends. Fermented rice noodles in a fish-based curry thinner and more herbaceous than the central Thai version, coloured gold with turmeric rather than red with chilli.

The forested hills ringing Sangkhlaburi belong to Khao Laem National Park. May brings a narrow advantage. The first rains of the transitional season start feeding waterfalls that ran thin through March and April. But the trails have not yet turned to the shin-deep mud that July and August deliver. Under the canopy, temperatures drop to around 30°C (86°F) compared to 37°C (98°F) in the exposed town. The forest floor smells of damp earth and decomposing teak leaves, a rich loamy scent that marks the season turning. The birdsong is louder in May than in the dry months. Migrants returning. Territory calls starting up. The undergrowth buzzes with cicadas that go quiet as you approach and restart behind you. Trails range from flat riverside walks of 2 to 3 km (1.2 to 1.9 miles) to steeper ridgeline routes that demand decent footwear and a willingness to sweat through your shirt. Start before 8 AM and plan to be off the trail by noon. May's afternoon thunderstorms build fast over the hills.

The drive from Sangkhlaburi to Three Pagodas Pass covers about 20 km (12.4 miles) of winding mountain road. It threads through forest and past Mon and Karen settlements. This drive is as much the point as the destination itself. The three small whitewashed chedis marking the historic passage between Thailand and Myanmar look almost modest after the build-up. The surrounding market rewards the trip. Vendors on both sides sell teak carvings, woven longyi fabrics, and thanaka bark paste ground into small clay pots. The textures and smells make the journey worthwhile. In May's low season, the coach tours from Kanchanaburi largely disappear. The market grows quieter and more conversational. Vendors have time to talk. The browsing feels less like shopping and more like visiting. The ridge-top viewpoints along the road open to panoramic views of the reservoir and forested valleys below when the morning air is clear. The haze that blankets the mountains through March has lifted by May.

After 4 PM the air cools enough to make paddling pleasant rather than punishing. The western mountains behind Sangkhlaburi catch the last light. They turn the reservoir copper and then grey in the space of forty minutes. The water laps against limestone outcrops and half-submerged trees. These are remnants of the forest floor before the dam filled the valley. The soundtrack shifts from birdsong to frogs tuning up along the muddy banks. In May the surface stays glassy most evenings. The wind patterns that chop the water during the true monsoon months have not yet established themselves. You can paddle close enough to the sunken temple ruins to see submerged walls through the water when the angle is right. It is a strange vertigo of looking down into rooms that once stood on solid ground. Stick to the coves and inlets rather than open water. Carry a headlamp. Darkness arrives fast at this latitude, roughly 15 degrees north. There is no illumination on the reservoir after sunset.