Kanchanaburi to Kampong Thom: A Road Trip Guide

Leaving Kanchanaburi, the bridge over the River Kwai is a relic of WWII that still sees trains crossing daily. The route to Kampong Thom follows Highway 323 northeast to the border at Bong Ti, then continues on Cambodian National Road 6. The total drive is roughly 750 km and typically takes 12–14 hours, including border formalities and rest stops.

This trip links two nations with distinctly different road cultures—Thai highways are smooth and well-marked, while Cambodian roads range from newly paved to dusty gravel. You'll cross from Thailand's lush western mountains into Cambodia's central plains, passing through historic battlefields and ancient temple remnants.

For a deeper strategy on discovering stops along the way, check out how to find the best stops and hidden gems between cities.

Thailand's Highway 323 is a well-paved two-lane road passing through towns like Sai Yok and Thong Pha Phum, with ample fuel stations every 30–40 km. Once you cross into Cambodia at Poipet, fuel becomes pricier and stations sparser, so fill up before leaving Thai soil. Diesel in Cambodia costs about 25% more per liter than across the border.

• Carry both Thai baht and US dollars: baht is handy for border towns, while dollars are accepted widely in Cambodia.
• The border crossing itself has two checkpoints—Thai exit and Cambodian entry—and can be busy; allow extra time for passport stamps and potential vehicle paperwork.
• Cambodian National Road 6 is a mix of paved and unpaved sections; the 250 km stretch from Poipet to Siem Reap is in good condition, but from there to Kampong Thom it deteriorates.

Tolls on Thai motorways are minimal, but on this route you'll mostly use free highways. Total toll costs are negligible.

As for worth: is it worth driving Kanchanaburi to Kampong Thom? For adventurous drivers who enjoy crossing cultures, yes. But if you only want to reach Cambodia's temples, flying into Siem Reap saves time and wear on your car.

The route starts in Thailand's Kanchanaburi province, known for its limestone karsts, waterfalls like Erawan, and the famous Death Railway. After the border, the landscape flattens into Cambodia's rice paddies and lotus fields, with the occasional palm tree dotting the horizon.

Wildlife sightings are possible: gibbons in Thai forests and water buffalo in Cambodian fields. For best stops Kanchanaburi to Kampong Thom, some highlights include Prasat Bakan (a 12th-century temple) and the bustling Psar Leu market in Kampong Thom city.

Local commerce along the route is fascinating—stalls selling durian and mangoes in Thailand give way to roadside vendors hawking fried tarantulas and fresh coconut in Cambodia. Markets are vibrant, and bargaining is expected.

In Kampong Thom, the Sambor Prei Kuk temple complex, a UNESCO World Heritage Site, is a must-see. This pre-Angkorian capital features brick temples dating from the 7th century, and its quiet setting contrasts sharply with the crowds at Angkor Wat.

Road quality varies dramatically. In Thailand, lanes are marked and shoulders are decent. In Cambodia, potholes and unmarked intersections are common, so drive defensively. Speed limits are 90 km/h in Thailand and 80 in Cambodia, but locals often exceed them.

For things to do between Kanchanaburi and Kampong Thom, consider visiting the Hellfire Pass Memorial (a museum and walking trail) and the Prasat Ba Thom ruins near Kampong Thom. Both are educational and safe for kids.

Families will find rest stops with parks in Thailand (e.g., at Sai Yok Noi Waterfall) and simple playgrounds at Cambodian roadside restaurants. Pet-friendly options are scarce—only a few hotels in Kampong Thom accept pets, so plan ahead.

For fatigue management, schedule breaks every two hours. Notable rest zones include the Poi Pet O'Neang Market and the Serei Sophon district, which offer food and shade. The climate is tropical: expect heavy rain from June to October, making the drive longer and more scenic with lush greenery.