Siem Reap to Kep Road Trip: Temples, Rivers, and Coastal Views

The road from Siem Reap to Kep spans 315 km along National Road 6 and National Road 2, typically taking 5–6 hours by car. Midway, Phnom Penh marks the junction where you leave NR6 for NR2, and the landscape shifts from flat rice paddies to the limestone peaks of the Elephant Mountains.

This route passes through two UNESCO World Heritage Sites: Angkor and Preah Vihear (though Preah Vihear requires a detour), and ends at Kep, a coastal town known for its 1908 French villas and crab market.

Use the rest stops at Skun (95 km from Phnom Penh) and Kampot town (90 km from Kep) for breaks; each has a petrol station, eatery, and clean toilets. Speeding is a risk on empty stretches—stick to 80 km/h where posted. For families, the roadside water parks in Kampong Speu (e.g., at Oudong) are a hit, and pet-friendly stays in Kep often allow dogs with prior notice.

Plan to stop every 2 hours to avoid fatigue, and avoid driving after dark, as unlit carts and scooters are common. The best-kept secret: the silent temple of Prasat Neang Khmau, 10 km off NR2, offers solitude without the crowds.

National Road 6 is a two-lane highway in fair condition, with some stretches under repair; NR2 is narrower but generally smooth. You'll pass through several towns where traffic slows, especially around Phnom Penh's outskirts. how to find the best stops and hidden gems between cities can help you plan detours.

• Fuel stations are available every 20–30 km; diesel costs ~4,200 riel/liter (Jan 2025).
• Tolls: only on Phnom Penh's NR2 route, about $2 per car.
• Road signs are in Khmer and English; GPS works well on mobile networks.

The Sangkae River south of Battambang feeds rice fields that turn emerald during monsoon (May–Oct). Further south, Kampong Speu province is covered in palm trees, and the Elephant Mountains form a dramatic backdrop as you near Kep. Kep's crab market, open from 7am to 6pm, sells fresh blue swimming crab, and the nearby pepper farms offer tours where you can sample Kampot pepper.

Hidden off-route spots include the abandoned hill station at Bokor (detour from Kampot) and the Phnom Chisor temple, an 11th-century sanctuary with views over the plain. Local commerce thrives at roadside stalls selling fried spiders in Skun, a town halfway between Phnom Penh and Kampong Cham.