🔄 Updated 21 Jun 2026
Bua Tong (Mexican sunflower) is a small yellow flower that looks like a miniature sunflower, growing in dense bushes across the hillsides. When the rains end and the air turns cold, the whole of Doi Mae U Kho shifts to gold as far as you can see. It's the moment locals in Mae Hong Son wait for all year, and the reason plenty of people are willing to drive the winding road all the way up to Khun Yuam.
Bloom season — when to go for a full field
The Bua Tong at Doi Mae U Kho bloom from mid-November to early December. The real peak, when the whole field is in full flower, is usually around the second to third week of November, and it holds for roughly two weeks before fading. The TAT Mae Hong Son office runs the official Bua Tong Flower Festival in mid-November each year.
Check before you set off
The flowers come early or late depending on the year's weather. Before you go, check the TAT Mae Hong Son Facebook page or the Khun Yuam district page — they post day-by-day photos of the bloom during the festival, so you don't end up at a field that hasn't opened yet or has already gone over.
Want more out of Mae Hong Son? Book tours & activities
Booking online ahead on Klook or GetYourGuide is usually cheaper than the gate and skips the queue. Pick only the experiences you actually want — prices and availability are shown live on each site.
Getting there — driving up Doi Mae U Kho
Doi Mae U Kho sits in Khun Yuam district, halfway between Mae Hong Son town and Mae Sariang. Take Highway 108 south from Mae Hong Son town to Khun Yuam — about 65 km, roughly 1.5 hours — then turn off onto the mountain road for another 25–30 km of switchbacks up to the field. All in, it's about 2–2.5 hours from town to the fields.
- Self-drive — the easiest option. The climb is steep with plenty of bends, so use a car in good shape with good brakes. A sedan can make it, but watch the hairpin turns.
- Motorbike — popular with riders who like a challenge, but it's steep and the road surface is rough in places. You'll want hill-riding experience and a full tank before heading up.
- Songthaew / hired truck from Khun Yuam — if you don't have your own vehicle, Khun Yuam town has local songthaews and hired trucks that run up the mountain. During the festival there are extra shuttle services. Agree the price with the driver before you go up.
- Fill up first — the last petrol station is in Khun Yuam town; there's none on the mountain. Top up the tank before you head up.
About the weather
At 1,600 metres, mornings and evenings get cold — winter temperatures can drop into single digits. Bring a warm layer. Midday, though, the sun is strong and it can get hot, so wear something easy to take off and put back on and you'll be most comfortable.
Entry fee and parking
The Bua Tong fields at Doi Mae U Kho have no entry fee — it's free. During the festival there are parking areas and local food stalls; some spots may charge a small parking fee set by the landowner. Bring small cash, since there's no ATM on the mountain and the mobile signal is patchy.
Photo spots and viewpoints
The appeal of Doi Mae U Kho is the layered ridges rolling like waves. Once the Bua Tong covers a whole hillside, you can shoot it both ways — wide shots of a yellow sea of mountains, and close-ups where you walk right into the middle of the flowers.
Main summit viewpoint
Where you see the Bua Tong stretching across the hillsides in one wide frame. Best shot in the early morning when the light is soft, and on some days a sea of mist drifts below the field.
Path through the field
There's a trail cutting through the Bua Tong so you can walk in and shoot with flowers all around you. Stick to the marked path so you don't trample the plants.
Morning backlight spot
Early light shining through the yellow petals gives a bright, airy look, and there are fewer people than later in the morning — good if you want photos without the crowds.
Early gets the edge
Leave Mae Hong Son town at first light and you'll reach the field while the light is still soft, the crowds are thin, and you've got a shot at the sea of mist. From late morning into the afternoon there are more visitors and the sun is harsher, making photos tougher.
Where to stay near the fields
Many people stay in Khun Yuam town and drive up early. But if you want to wake up right by the Bua Tong, there are homestays and camping grounds within a few hundred metres to a few kilometres of the fields — mostly bamboo cabins or camping spots run by locals and the park.
- Homestays / cabins near the field — local-style bamboo cabins with thatched roofs, a few hundred metres from the main field. Good if you want to wake up to the view straight away. They fill up fast during the festival, so book ahead.
- Camping grounds — both local-run spots and pitches managed by the area's authorities. Good for campers who want to sleep out in the cold mountain air; bring a warm enough sleeping bag.
- Stay in Khun Yuam town — there are small resorts and guesthouses in the district town at gentler prices, then you drive up in the morning. Good if you'd rather not sleep outdoors.
More to see around Khun Yuam and along the way
Khun Yuam is a small district that people usually pass through on the Mae Hong Son–Mae Sariang route. If you've made it here with time to spare, these stops round out the trip.
Thai–Japan Friendship Memorial Hall, Khun Yuam
A museum telling the story of the Japanese soldiers who passed through Khun Yuam during WWII, with original objects on display. It's in the district town — an easy stop on the way.
Mae Hong Son town
Another hour and a half of driving gets you to town, with Wat Chong Kham and Chong Klang, Phra That Doi Kong Mu, and a morning market to eat your way through.
Plan your whole winter trip to Mae Hong Son
See the Mae Hong Son travel guide →