Driving Pak Chong to Kampong Thom: Essential Road Trip Guide

Pak Chong, Thailand's gateway to Khao Yai National Park, sits at the edge of the Khorat Plateau. Kampong Thom, Cambodia's rice bowl, lies along the Sen River. The 350-kilometer drive between them crosses the Dongrek Mountains and the Cambodian border, transitioning from Thai plateau to Cambodian lowlands.

Leaving Pak Chong, the road ascends through the Dongrek escarpment, where forests give way to open farmland. On the Thai side, the scenery is punctuated by cassava and sugarcane fields, interspersed with limestone outcrops. After the border, the Cambodian landscape flattens into vast rice paddies, dotted with sugar palms and traditional wooden stilt houses.

UNESCO World Heritage Sites near the route include Phanom Rung Historical Park (off the main route via minor roads) on the Thai side, and Sambor Prei Kuk, a pre-Angkorian temple complex just south of Kampong Thom. These sites offer a deep dive into ancient Khmer architecture and are well-signposted from major roads.

Local commerce along the way is vibrant yet informal. In Thailand, roadside stalls sell fresh fruit, grilled chicken, and sticky rice. Across the border, markets in Poipet and Skun offer tropical fruits, fried insects, and local snacks. For sit-down meals, the larger towns like Aranyaprathet and Kampong Thom have simple restaurants serving both Thai and Khmer dishes.

For planning detailed stops, consult how to find the best stops and hidden gems between cities for methods beyond main highways.

The Thai section is safe and well-maintained, but wildlife occasionally crosses near Khao Yai. In Cambodia, watch for motorcycles, livestock, and unmarked speed bumps. Drive with headlights on, and reduce speed in rural areas, especially after dark.

For families, the journey is manageable with children if you plan frequent breaks. Major gas stations on the Thai side (PTT, Shell) have clean restrooms and playgrounds. In Cambodia, modern service stations along National Route 5 offer restrooms and basic food. Keep snacks and water in the car, as rural stretches have few facilities.

Pets are allowed to cross with an official veterinary health certificate from the exporting country's government, present a rabies vaccination certificate at least 21 days old. Both Thailand and Cambodia require these for entry.

To combat fatigue, take a break every two hours. Notable rest stops include the roadside viewpoint at the Dongrek escarpment, the bustling town of Aranyaprathet for lunch, and at the Cambodian border, the Poipet resort area. A longer stop at Sambor Prei Kuk (around 30 km from Kampong Thom) offers a serene picnic spot amid ancient ruins.

From Pak Chong, take Highway 2 south to Bangkok, then follow Highway 1 (Phahonyothin Road) to Aranyaprathet, a 240-kilometer leg. After crossing into Cambodia at Poipet, National Route 5 runs the remaining 110 kilometers to Kampong Thom. The entire journey takes 6 to 7 hours, depending on border procedures and traffic.

Border formalities typically require 30 to 60 minutes. Both countries have visa-on-arrival for many nationalities, but check current requirements. Road quality is excellent on the Thai side, with well-marked lanes and rest areas. In Cambodia, the highway is paved but narrower, with occasional potholes and less signage.

• Fuel costs: Gasoline in Thailand (~₿35/liter) is cheaper than in Cambodia (~$1.20/liter); fill up before crossing.
• Tolls: A few toll gates on Highway 1; total tolls about 200 baht (c. $6).
• Insurance: Thailand's compulsory coverage stops at the border; purchase Cambodian insurance at Poipet (c. $10 for a week).
• Documentation: Carry vehicle registration and passport; a Carnet de Passages is not needed for most vehicles.