Kampot to Koh Rong: Essential Road Trip Guide, Stops & Tips

The route from Kampot to Koh Rong begins on National Highway 3 (NH3), a two-lane asphalt road that cuts through Kampot Province's durian orchards and limestone karsts before joining National Highway 4 (NH4) near Veal Renh. The final stretch to the Sihanoukville ferry terminal adds 20km of coastal highway, wrapping around the deep-water port of Kampong Som. With 105km of tarmac and a 45-minute ferry crossing, this journey combines Cambodia's agrarian heartland with its gulf-island frontier.

Unlike the chaotic overtaking lanes near Phnom Penh, NH3's traffic thins after the salt fields of Kampot, offering a rare window of serene driving. However, the road's narrow shoulders and occasional livestock crossings demand vigilance. Most drivers budget 3 hours for the road portion, including a fuel stop and coffee break, to reach the ferry pier at 10.562°N, 103.490°E.

Speeding is the primary risk on NH4, where 16% of Cambodian road fatalities occur. Stick to 60km/h through villages, as children chase buffalo across the pavement. The road surface is narrow in places, especially over the O'Chheuteal bridge, with no guardrails. For how to find the best stops and hidden gems between cities, look for the green 'Tourist Site' signs in Khmer and English—but always ask locals for newly opened spots.

Families find the route manageable: the highway has no steep passes or sharp hairpins, and the ferry allows strollers but not car seats (must be carried). Pet-friendly framework is decent—the speedboat accepts small pets in carriers, but on land, only the Sabay Beach Resort (Kampot) and Jasmine Bungalows (Koh Rong) allow dogs outdoors. Pack earplugs for the island's nightlife.

Fatigue management is critical: the monotony of the Veal Renh plains lulls drivers. Rest at the Banteay Prey Temple picnic area (Km 50), where shade and clean restrooms await. Or stop at the O'Chheuteal Beach (Km 80), a local swimming spot with basic shacks. Hidden off-route spots include the abandoned casino at Sihanoukville's Victory Hill (accessible via a dirt road) and the secret lagoon behind the Koh Rong ferry pier, reachable by kayak.

Road quality on NH3 is a mix of recently patched segments and older, worn asphalt, while NH4's toll-free sections are generally smooth but potholed after heavy rains. Fuel stations are scarce; the Caltex at Veal Renh (just before the junction) and the Total station near Sihanoukville's airport are the last reliable options before the island. Keep the tank topped up—Koh Rong has no fuel stations.

The ferry for Koh Rong (operated by GTVC and Buva Sea) departs from the speedboat terminal on the Sihanoukville Autosersei Pier. Buy tickets in advance during peak season (Dec-Feb) or expect 30-minute queues. The crossing on twin-engine catamarans is stable, but heavy monsoon swells (June-September) can cause seasickness; take motion sickness pills. At 10.662°N, 103.496°E, the island pier is just a 5-minute walk to the main beach.

• How long to drive Kampot to Koh Rong: 2.5-3 hours total road time, excluding ferry.
• Ferry tickets: $25 for foreigners, $8 for locals (one-way).
• Is it worth driving Kampot to Koh Rong? Yes, as the coastal scenery and freedom to stop at hidden spots outweigh the bus alternative.

The route unfolds through Cambodia's wettest region, with annual rainfall exceeding 4 meters on the mountains flanking the road. This monsoon-driven climate drapes the Prey Nup paddy fields in emerald from June to October, while the dry season (Nov-May) scorches the edges with golden dust. The landscape shifts from Kampot's pepper plantations—the peppercorns are UNESCO-listed (Intangible Cultural Heritage, 2020)—to the salt evaporation pans of Phnom Penh, where workers rake crystals by hand.

Local commerce thrives around the seafood landing at Ream, where boats unload blue crabs, and the roadside stalls at Teuk Chhou sell sugar palm juice and grilled squid. For best stops Kampot to Koh Rong, pull into the Wat Kompong Tralach monastery (pre-1920s murals) at the 12km mark, or the mangrove boardwalk of Prey Nup at Km 20. The Phsar Leu market in Sihanoukville (known locally as 'Downtown Market') is a chaotic labyrinth of dried fish and imported cosmetics.