Nong Bua Lamphu to Kampong Chhnang: Road Trip Guide

This road trip crosses the Mekong River, linking the Thai heartland of Nong Bua Lamphu with the Cambodian riverside town of Kampong Chhnang. The drive covers approximately 700 kilometers, usually taking 10–12 hours depending on border crossings and traffic. It's a journey that shifts from the arid Khorat Plateau to the lush floodplains of Tonlé Sap, offering a dramatic change in scenery and culture.

As you travel south, you'll notice the roads becoming more congested and the climate more humid. This guide breaks down the logistics, key stops, and practical tips to help you decide if this drive is worth your time.

The journey begins on Thai Highway 210, then connects to Route 12 through Chum Phae, before joining the main artery of Highway 2 towards Nakhon Ratchasima. From there, you'll continue on Thai Highway 24 to the border at Chong Sa Ngam (Thailand) / Anlong Veng (Cambodia), then take Cambodian National Road 68 to Siem Reap, and finally National Road 5 south to Kampong Chhnang. The total driving time is roughly 10-12 hours, but border procedures can add 1-2 hours.

Road quality varies significantly: well-paved highways in Thailand give way to potholed sections in Cambodia, especially on National Road 68. Fuel is cheaper in Cambodia (about $1.10/liter) than in Thailand ($1.30/liter), so plan to fill up before crossing. Toll fees on Thai motorways amount to around $5 for the entire stretch.

Just south of Nong Bua Lamphu, the Phu Phan mountains rise abruptly, covered in dry dipterocarp forest. These hills are home to the famous Wat Tham Klong Pheng, a temple with panoramic views. As you descend, the landscape flattens into rice paddies that stretch to the horizon, a glimpse into Thailand's agricultural heartland.

Crossing into Cambodia via the Anlong Veng border, you'll notice the terrain become more rugged, with the Dângrêk Mountains giving way to savanna. The route passes near the UNESCO World Heritage Site of Preah Vihear, though it's a detour of about 70 km from the main road. Further south, the landscape transforms into the Tonlé Sap floodplain, where floating villages and stilt houses line the riverbanks.

Local commerce thrives along the way: you'll find bustling markets in Siem Reap selling everything from fresh fruit to handmade crafts. In Kampong Chhnang, the town is famous for its pottery villages, where you can watch artisans shape clay using traditional techniques passed down through generations.

Throughout the journey, rest stops are plentiful on the Thai side, with restaurants and clean toilets every 30-50 km. In Cambodia, services are sparser, so fill up and use facilities before leaving Siem Reap. For families, the Khao Yai National Park, a detour of about 100 km from the route, offers waterfalls and wildlife, but if you're driving directly, the Angkor Wildlife Sanctuary near Siem Reap is a kid-friendly stop.

If you're traveling with pets, Thai roadside restaurants are generally not pet-friendly, but many allow pets on outdoor terraces. In Cambodia, you'll need to carry a health certificate and vaccination record for your pet, and be mindful that dogs are not as commonly kept as pets in rural areas.

To combat fatigue, plan to stop every two hours. Major rest zones include the one at Khorat (Nakhon Ratchasima) and the Cambodian border town of Anlong Veng, which has basic lodgings. For hidden gems, consider the lesser-known Prasat Ta Muen Thom, a remote Khmer temple near the Thai-Cambodian border, accessible via a rough road.