Koh Rong to Samraong Drive: Route Guide & Hidden Gems

The route from Koh Rong to Samraong crosses Cambodia's southwest corner, linking the Gulf of Thailand's tropical islands to the inland plains near the Thai border. This 380-kilometer drive combines ferry crossings, national highways, and rural roads, with a total travel time of about 7 hours excluding stops. Notably, the journey traverses the Cardamom Mountains' eastern fringe, where the terrain shifts from coastal mangroves to dense rainforest and later to agricultural lowlands.

Driving this route offers a rare cross-section of Cambodia's diverse geography. You'll witness the transition from the island's white-sand beaches to the mainland's bustling port city of Sihanoukville, then head north through Kampong Speu province. The final stretch into Samraong, the capital of Oddar Meanchey province, passes through cashew plantations and near the ancient temple complex of Preah Vihear.

Quick Overview

The route from Koh Rong to Samraong passes through three distinct ecological zones: the coastal mangroves of Prey Nop, the Cardamom Mountains' rainforest, and the dry savanna of Oddar Meanchey. Keep an eye out for hornbills and gibbons in the mountain section, while the northern plains are home to the endangered banteng.

Local commerce along the way is characterized by roadside markets selling fresh fruit, palm sugar, and grilled skewers. In Battambang, stop at the famous Psar Nat market for dried fish and local noodles. Near Samraong, you'll see clusters of cashew nut processors offering bags of fresh nuts at bargain prices.

The only UNESCO World Heritage Site near this route is Preah Vihear Temple, a 20-kilometer detour from Samraong. This 11th-century Khmer temple sits atop a cliff with panoramic views over the Cambodian plains. Also consider the Koh Ker temple complex, a 45-minute detour southeast of Samraong, though it lacks UNESCO status.

The journey begins with a ferry from Koh Rong to Sihanoukville's port. Multiple operators run daily ferries, with the 45-minute crossing costing around $10 per person. Once on the mainland, you'll follow National Road 4 northeast to Phnom Penh, then switch to National Road 5 and later National Road 6 towards Siem Reap, finally taking National Road 68 north to Samraong. The entire route is well-paved except for a few sections near the Thai border.

Fuel stations are sparse in rural stretches, especially between Battambang and Samraong. Plan to fill up in Sihanoukville and again in Battambang or Siem Reap. Diesel costs about $1.10 per liter in Cambodia, and a typical SUV consumes roughly $60 in fuel for the whole trip. Tolls apply only on the Phnom Penh-Sihanoukville Expressway, totaling $12 for a car.

• Best stops from Koh Rong to Samraong include the fish market in Kampong Som, the bamboo bridge in Kampong Loung, and the Banteay Chhmar temple ruins.
• How long to drive from Koh Rong to Samraong is roughly 7 hours plus the ferry, so allocate a full day.
• Is it worth driving from Koh Rong to Samraong if you're heading to the Thai border or Preah Vihear—yes, as it saves connecting flights through Phnom Penh.

Road quality is generally good, but sections of National Road 4 are narrow and heavily used by trucks. Drive defensively, especially at night when livestock and cyclists without lights are common. Seatbelt use is mandatory, and Cambodian law enforces a .05 blood alcohol limit for drivers.

For families, the route offers several kid-friendly stops. The Sihanoukville port area has clean parks, and the Battambang bat caves at sunset are a natural spectacle that appeals to all ages. Along the way, you'll find restrooms at major fuel stations and convenience stores in towns.

Pets are allowed in most Cambodian accommodations, but be sure to carry a crate or harness when entering temples or wildlife areas. For fatigue management, plan to stop every two hours at designated rest areas marked with blue signs. The journey is long, so consider an overnight stay in Battambang to break it up. For planning additional stops, refer to how to find the best stops and hidden gems between cities.

Hidden off-route spots: the abandoned French colonial railway bridge at Kampong Kdei (13°13′N 104°10′E) is a mysterious photo stop. For a lunch break, Samraong's local noodle shops serve a unique fermented fish soup, or samlor machu.