Pak Chong to Koh Kong Road Trip: Routes, Stops & Tips

The 400-mile route from Pak Chong to Koh Kong crosses the southern spur of the Dongrek Mountains, a transitional zone where limestone karsts give way to the Cardamom rainforest. Expect 8–10 hours of driving, but the journey is as rewarding as the destination, passing through UNESCO-listed temple complexes and the Gulf of Thailand's unspoiled coast.

One immediate quirk: Thai Route 304 runs parallel to the border before turning south, and you'll cross into Cambodia at the O Smach border checkpoint, one of the few crossings open 24/7 – handy for night-owl drivers.

The route's natural highlight is the Phanom Dongrak viewpoint, where you can see the dense jungle of the Cardamoms sweeping toward the sea. In Cambodia, the Peam Krasaop Wildlife Sanctuary near Koh Kong protects one of the last mangrove forests, visible from a long boardwalk – an easy detour.

Local commerce thrives in Aranyaprathet's makeshift market, selling everything from counterfeit watches to traditional Thai herbal balms. In Trat, a coastal province, fresh seafood and local pepper farms are must-stops.

Skipping the planned stops? Consider the well-known detour to how to find the best stops and hidden gems between cities before you leave – it's worth it.

From Pak Chong, take Highway 2 south through Korat to Aranyaprathet, a straight shot on a four-lane highway. After the border, Cambodian roads improve rapidly as you approach Koh Kong, the last 50 km on a modern expressway that skirts the coast.

Fuel is cheapest in Thailand – about 0.90 USD/litre cheaper than in Cambodia – so fill up before crossing. Cross-border insurance is mandatory, and you'll need the vehicle's green book; costs around 20 USD for a 30-day policy.

• Estimated drive time: 8–10 hours (including border formalities)
• Border crossing opens at 8:00 AM, closes at 8:00 PM daily.
• Cambodian visa on arrival: 30 USD, require one passport photo.
• Thai SIM cards lose signal after the border; consider a Cambodian SIM at the checkpoint.

Highway 2 is in good condition, but watch for wandering motorcycles. In Cambodia, potholes are common on secondary roads, so slow down. Drive only daylight hours – the Cambodian stretch lacks street lighting, and cattle often cross at dusk.

For families, the Sra Kaew Zoo near Aranyaprathet offers a quick stretch, while the UNESCO-listed Preah Vihear temple is a longer but rewarding diversion. Furry companions are allowed in outdoor areas at most stops, but keep them leashed; only a few hotels in Koh Kong are pet-friendly, so book ahead.

Plan rest breaks every 2 hours; designated rest stops are sparse after the border. The Klong Yai viewpoint is an ideal midpoint, with decent food and clean toilets. If you're prone to drowsiness, a short nap in a roadside coffee shop in Trat could be a lifesaver.