Sisophon to Stung Treng Road Trip: Essential Guide

Leaving Sisophon (also spelled Serei Sophoan) on National Highway 6, you'll traverse 312 kilometers eastward to Stung Treng on the banks of the Sekong River. This drive, typically taking 5 to 6 hours, crosses the Tonlé Sap basin, skirts the Dângrêk Mountains to the north, and finishes on the edge of the Mekong floodplains. The road itself is a two-lane highway for most of the way, with the section from Sisophon to Siem Reap recently upgraded to a smooth tarmac surface.

Along the way, you'll encounter the historic Angkor complex near Siem Reap, the only UNESCO World Heritage Site on the route. The countryside shifts from rice paddies and palm trees to dense secondary forest as you approach Stung Treng. Planning for fuel and food is essential, as service stations become sparse after Kampong Thom.

Highway 6 (NR6) is the main artery, linking Sisophon and Stung Treng via Siem Reap and Kampong Thom. The road is sealed asphalt for its entire length, but condition varies: the first 100 km from Sisophon are excellent, while some potholes and repaving zones appear near the Stung Treng end. Traffic is light outside of provincial towns, with the exception of shared minivans and motorbikes near Siem Reap.

• Drive time: 5–6 hours without stops, 7–9 hours with meals and photo breaks.
• Speed limits: 60–90 km/h depending on road markings and village proximity.
• Fuel stations: Plentiful in Sisophon and Siem Reap; then a long gap of ~200 km with only a few small stations until Kampong Thom.
• Toll roads: None on this route; all sections are toll-free.
• GPS note:Coordinates for Stung Treng town center are 13.5272° N, 105.9683° E.

For detailed strategies on identifying the best stops and hidden gems between cities, the Wayro guide offers practical tools: how to find the best stops and hidden gems between cities.

Safety is a primary concern on Cambodian highways. Pedestrians and livestock frequently cross the road, especially in rural areas, so anticipate sudden braking. The road has no median barriers for most of its length, and nighttime driving is discouraged due to poor lighting and it's advisable to avoid after 6 pm. When hiring a local driver, expect a rate of $35–$50 for the full journey, depending on your negotiation skills.

For families, the route offers several child-friendly breaks. The Cambodian Cultural Village near Siem Reap has interactive exhibits and a miniature temple replica, while the Phnom Kulen Waterfall (a 40 km detour from the highway) provides shallow pools for kids to splash in. For pets, many roadside guesthouses in Siem Reap and Kampong Thom are pet-friendly, but you'll need to ask at booking. When fatigue sets in, pull into designated rest areas or large fuel station plazas; these often have shaded parking, convenience stores, and clean restrooms.

Hidden off-route spots include the Beng Mealea temple, surrounded by thick jungle and largely unrestored, located 60 km east of Siem Reap. Further along, the Pre Dak and Preah Khan of Kampong Svay ruins near Kampong Thom are rarely visited but remarkable. For culinary variety, the town of Skuon (spider village) offers fried spiders as a local delicacy – a quirky stop if you're feeling adventurous.

The Angkor Archaeological Park, near the midpoint of your drive, is the route's most significant cultural landmark. This UNESCO World Heritage Site spans 400 square kilometers and contains the iconic temples of Angkor Wat, Bayon, and Ta Prohm. Admission fees are $37 for a one-day pass (as of 2025), payable at the main entrance. For drivers not stopping for a full tour, the park's perimeter road allows a scenic detour through the jungle without entering the temple zone.

Beyond Angkor, local commerce centers on market towns like Kralanh and Krouch Chhmar, where you can buy fresh fruit (mangoes, rambutans) and rice snacks from roadside stalls. The wetlands north of Siem Reap attract migratory waterbirds during the dry season (November to April), making for impromptu bird-watching stops. As you near Stung Treng, the landscape becomes wilder, with patches of dipterocarp forest hosting wildlife like gibbons and hornbills – though sightings are rare directly from the highway.