Sukhothai to Udon Thani: Scenic Drives & Hidden Gems

Leaving Sukhothai, the first capital of Siam, you drive east on Route 12, a road that shadows the Yom River before climbing into the Phetchabun Mountains. This 340-kilometer drive to Udon Thani takes roughly 5 hours without stops, but the journey rewards those who linger.

The route passes through Phitsanulok, a major transport hub, then winds through the forested hills of Khao Kho, where the temperature drops noticeably as you gain elevation.

For a quick guide on optimizing city-to-city drives, see how to find the best stops and hidden gems between cities.

In the Khao Kho area, limestone cliffs and pine forests dominate, offering panoramic viewpoints like Khao Takhian Ngo. The UNESCO-listed Sukhothai Historical Park is a must-see before you leave, with its 13th-century temples.

Local markets along the way sell sweet tamarind from Phetchabun and spicy som tam from Isan. Don't miss the roadside coffee shops near Lom Sak.

Hidden gems include the Thung Salaeng Luang National Park (just off Route 12) for its waterfalls and wildlife, and the Phu Hin Rong Kla National Park, a former communist stronghold with unique rock formations.

Mountain sections have sharp curves and steep grades; use low gears to avoid brake fade. The route is generally safe, but beware of motorbikes and livestock on rural roads.

For families, the Khao Kho Wind Farm is a fun photo stop, and the Rajabhat University Observatory (near the highway) offers star-gazing events occasionally.

Pets are welcome at most open-air cafes along the route; carry vaccination papers for national park checks. For fatigue, plan stops every 2 hours; the PTT stations on Route 12 have clean restrooms and 24-hour convenience stores.

Local culture: The Phra That Si Songkhram temple (off-route) is a revered landmark.

Route 12 is the most direct path, with a mix of four-lane highways and winding mountain sections. The final stretch from Nong Bua Lamphu to Udon Thani is flat and fast.

The route has limited tolls, mainly on the bypass around Phitsanulok. Fuel prices are slightly lower in provincial stations, so fill up before entering the mountains.

• Road quality: Good asphalt overall; watch for potholes after rainy season.
• Toll booths: Only on the Phitsanulok bypass.
• Rest areas: Every 50–70 km with basic facilities.
• Mobile coverage: Patchy in mountains, strong in cities.