Sa Dec to Koh Kong Road Trip: Routes, Stops & Tips

Leaving Sa Dec, a town known for its flower gardens along the Mekong, the journey to Koh Kong crosses two countries and several distinct ecological zones. The route passes through the flat, canal-laced rice fields of Đồng Tháp Province, crosses the border at Xà Xía/Prek Chak, and then winds through the Cardamom Mountains before arriving at the coastal town of Koh Kong on the Gulf of Thailand. This is a drive of about 360 kilometers, typically taking between 8 to 10 hours depending on border procedures and road conditions. While not the fastest route, it offers a diverse snapshot of the region's agriculture, mountain forests, and emerging tourism infrastructure.

Road safety on the Cambodian stretch has improved, but remains a concern. The Koh Kong Highway has few guardrails and many steep drop-offs, so it's essential to drive defensively. In the rainy season, check weather forecasts, as landslides can close sections. Wear seatbelts, carry a first-aid kit, and have emergency numbers for both countries. If you're traveling with children, break the trip into manageable segments and look for stops with open spaces, such as the beach at Sihanoukville (a detour) or the playgrounds at some roadside cafes. For pet owners, pets are generally allowed in vehicles, but ensure they have proper vaccination certificates for border crossing; some ferries (if you take a shortcut) may not allow them.

To manage fatigue, plan stops every two hours. Recommended rest areas include the Cao Lanh market for a snack, Neak Loeung ferry crossing (if you take that route), and the town of Bud Saphan (formerly known as Banteay Meas) for a quick meal. For a longer break, stay overnight in Kampot, which offers riverfront guesthouses and French colonial architecture. The climate—tropical, with heavy rain and high humidity—makes staying hydrated crucial. Carry water and avoid long drives during the hottest part of the day (noon to 3 p.m.).

From Sa Dec, take National Route 80 west to Cao Lanh, then continue on National Route 30 to Chau Doc and Tinh Bien border gate. After crossing into Cambodia at Prek Chak, follow National Road 33 to Kampot, then National Road 48 (also known as the Koh Kong Highway) through the Cardamom Mountains to Koh Kong. The Koh Kong Highway is a two-lane paved road that cuts through dense forest and over mountain passes, with several hairpin turns and occasional landslide-prone sections.

• Road quality: The Vietnamese side is generally in good condition, with a mix of rural roads and city bypasses. In Cambodia, the Koh Kong Highway is well-paved but narrow in places, requiring caution during heavy rain.
• Fuel stations: Available in Sa Dec and Cao Lanh; on the Cambodian side, fill up in Kampot or at the few stations near the coast. Fuel prices in Cambodia are often 5-10% higher than in Vietnam, so plan accordingly.
• Border crossings: The Xà Xía/Prek Chak crossing is open from early morning to late evening, but hours may vary; check current times. Have valid passports and vehicle documents ready; expect to pay small unofficial fees for expediting vehicle paperwork.

Driving the entire route can be tiring, so plan to break it into two days if you want to explore. The fastest viable schedule is a single long day, but that leaves little room for spontaneous detours. Many travelers choose to spend a night in Kampot, a charming river town about 60 kilometers north of the coast, to break up the journey. For those interested in discovering hidden gems, our guide on how to find the best stops and hidden gems between cities offers tips on using local forums and digital maps to uncover lesser-known attractions.

The drive begins between the Mekong and Bassac rivers, where greenhouses and flower nurseries dominate. In the dry season (December to April), the landscape is lush; during the wet season (May to November), expect flooding in low-lying areas, which can impede travel. After crossing into Cambodia, the road passes through pepper plantations near Kampot and then climbs into the Cardamom Mountains, one of Southeast Asia's largest remaining lowland evergreen forests. This area is a biodiversity hotspot, with rare species like the Siamese crocodile and the pileated gibbon, though sightings from the road are rare. Several rivers and waterfalls, such as Tatai Waterfall, are accessible via short detours.

Local commerce along the way reflects the agricultural and fishing economies. In Vietnam, roadside stalls sell fresh fruit, rice crackers, and cao lanh (a type of water hyacinth). Across the border, you'll find markets with dried fish, Kampot pepper, and locally woven textiles. In Koh Kong, the night market offers a variety of seafood and grilled meats. While the cuisine is generally simple, there are a few sit-down restaurants in Kampot and Koh Kong serving both Khmer and international dishes.