Tak to Khon Kaen Road Trip: Route 12 Guide

Route 12 (Asian Highway 16) arcs east from Tak to Khon Kaen, crossing the Phetchabun Mountains. This 300-kilometer drive typically takes five hours in good conditions. The historical anchor: Tak was the birthplace of King Taksin the Great, who ruled Siam from 1767–1782, and the highway's mountainous section north of Phitsanulok was a key logistics line during the Cold War.

The route traverses three provinces: Tak, Phitsanulok, and Khon Kaen. Elevation peaks around 1,200 meters at the famous Khao Kho viewpoint (16.5418° N, 101.0282° E). During winter (November–February), fog can reduce visibility to 50 meters on elevated passes, adding significant drive time.

The Phetchabun Mountains (Thung Salaeng Luang National Park) dominate the drive's first half, with scenic switchbacks and montane forests. The second half rolls through the Khorat Plateau's rice paddies. Phu Kradueng National Park (entrance 400 THB for foreigners), a UNESCO World Heritage Site, is 30 km off Route 12 near the town of Phu Kradueng. Its table-topped mountain offers 6–8 hour trekking loops.

Local commerce thrives in roadside fruit markets near Lom Sak, selling sweet tamarind and purple passionfruit. In Chum Phae, a district on the route, the weekly walking street (Friday evenings) features Isan silk and local snacks. This area is also known for its Lao-style papaya salad (tam mak hoong), distinct from Bangkok's version.

Fuel stations cluster every 40–60 km along Route 12, but the stretch between Lom Sak and Khon Kaen has a 30 km gap without services. PTT and Bangchak stations accept all major credit cards. Diesel prices averaged 30 THB/liter in early 2025; fuel economy for a typical sedan (8 L/100km) gives a one-way fuel cost of 720 THB. Toll-free roads, but watch for speed cameras in Muang Khon Kaen.

Road quality is uniformly good asphalt, but the mountain section has sharp curves and occasional landslides after heavy rain. For rest, the highway has designated rest areas at Thung Samo (km 62) and Wang Thong (km 145), each with toilets and small cafes. Consider downloading offline maps – cell coverage is patchy from Thung Samo to Wang Thong.

Accident-prone curves are marked with flashing yellow signs; drive below 60 km/h during rain. For families, Khao Kho's wind farm offers a safe playground area and ice cream café. Most roadside restaurants have high chairs, but few have children's menus. Pet owners: many rest stops allow dogs on leash, but only one – the Wang Thong rest area – has a dedicated pet relief area.

To combat fatigue, plan to stop every 2 hours; the Thung Samo rest area has shaded picnic tables. For a longer break, Phitsanulok's city center is 4 km off Route 12 and offers free parking near the Nan River. Hidden off-route spot: the Khek River confluence (16.6022° N, 100.7680° E) has a quiet swimming hole, 8 km north of Lom Sak on a dirt road – accessible for pickup trucks or SUVs.

Combine pre-planning with on-the-fly exploration – a practical approach to how to find the best stops and hidden gems between cities. For most travelers, this route is a satisfying balance of mountains and culture. When considering best stops Tak to Khon Kaen, prioritize Khao Kho and Chum Phae. If you're asking how long to drive Tak to Khon Kaen, budget an extra hour for fog in winter. Ultimately, is it worth driving Tak to Khon Kaen? Yes, especially if you detour to Phu Kradueng. Extensive things to do between Tak and Khon Kaen include a boat trip on the Nan River in Phitsanulok.