Korat to Kampong Cham: Road Trip Guide & Hidden Gems

The overland route from Nakhon Ratchasima (Korat) to Kampong Cham covers roughly 630 km, crossing the Thai-Cambodian border at Chong Bok/O Smach. This is a journey from the Khorat Plateau, at 150 meters elevation, down to the Mekong floodplain, where the river sits at just 20 meters above sea level.

Most travelers choose this route to avoid the congestion of Bangkok and to directly access Cambodia’s central plains. The drive time, excluding border formalities, is approximately 11 hours under normal conditions. The most direct path follows Thai Route 2073 to the border, then Cambodian National Road 7 (NR7) south through Stung Treng and Kratie.

Road quality is generally smooth, but watch for potholes in wet months. The climate is tropical monsoon; November to February is dry and cool (~27°C), while March to May can hit 38°C with high humidity. Secure sunglasses and water for all passengers.

For families, the Kratie dolphin viewing platforms are kid-friendly, and Stung Treng offers simple riverboat rides that appeal to children. Rest stops are sparse; plan for food at towns like La Lay (Cambodia) and Kratie. If you travel with pets, note that this route is not particularly pet-friendly – no dedicated pet facilities, but most local accommodations on the Cambodian side accept them if you ask.

• Fatigue: Drive no more than 2-3 hours between breaks; use roadside pavilions in Thailand.
• Hidden off-route spot: The old French bridge at Kratie – a photograph favourite.
• Safety: Border formalities can take 1-2 hours; carry passport copies.

For more on discovering unique stops, see our guide on how to find the best stops and hidden gems between cities.

The landscape transitions from the dry, scrubby forests of Isaan to the mixed deciduous woodlands of northern Cambodia, with the Dangrek Escarpment providing a dramatic drop at the border. After crossing, NR7 follows the Mekong River’s eastern bank, where you’ll encounter the freshwater dolphins of Kratie – a memorable stop.

Near the town of Preah Vihear, the UNESCO World Heritage site of the same name is accessible via a steep climb from the plain, though it’s slightly off the direct route. Along the way, small roadside markets sell tropical fruits like rambutan and durian during the May-July season.

• Natural attractions: Kratie dolphin pool (seasonal), Phnom Srok mountain viewpoint.
• Local commerce: Fish-drying villages near Kampong Cham offer smoked fish specialties.

Fuel stops are plentiful on the Thai side, but once you cross into Cambodia, stations cluster around provincial towns like Stung Treng and Kratie. Diesel in Cambodia costs about 4,500 riel per liter ($1.10), slightly cheaper than Thailand’s ~$0.90 per liter – but note that Thai stations accept baht, while Cambodian stations prefer riel or US dollars.

Border crossings at Chong Bok (Thai) and O Smach (Cambodian) are open daily from 7 AM to 8 PM. Prepare your Thai TIP (temporary import) to avoid delays. Road taxes and insurance can be purchased at the border for about $20.

• Toll roads: none on either side; the only cost is border fees.
• Road quality: Thai Route 2073 is recently paved and smooth; Cambodian NR7 is in good condition but narrow in sections.
• If you want the more scenic route, consider the detour via Kulen Promtep Wildlife Sanctuary.