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Ream National Park

A coastal park of mangrove, beach and islands beside Sihanoukville, under heavy pressure from development.

Updated 1 September 2026

WherePreah Sihanouk
Nearest citySihanoukville
Best seasonNovember to April
Time to allowOne day
Getting thereAbout 20 km east of Sihanoukville near the airport
EntryPark fee; boat trips charged

Ream covers a stretch of coast east of Sihanoukville taking in mangrove along the Prek Toek Sap river, beaches, evergreen forest on the hills and several offshore islands, and the standard visit is a boat up the river through the mangroves, out to a beach for lunch and swimming, with birdwatching along the way: kingfishers, egrets, sea eagles and, in the mangroves, macaques. Dolphins are occasionally seen offshore. The park has come under severe pressure in recent years, with large areas of its territory reallocated for development and construction reaching the boundaries, which is visible on any visit and is the honest context for it. Trips are arranged in Sihanoukville or at the ranger station.

Highlights

  • Mangrove channels - the boat route up the Prek Toek Sap.
  • Coastal forest - evergreen woodland on the hills behind the shore.
  • Beaches and islands - the swimming stops on the boat trip.
  • Development pressure - construction reaching the park's edges.

When to go

November to April is the dry season with the calmest sea for boat trips. May to October brings heavy rain and rough water. Birds are most active early in the morning.

Good to know

Much of the park has been lost to development and what remains is squeezed; visitors expecting protected wilderness will be disappointed. Boat trips are hired whole and prices negotiated. Ranger presence and facilities are minimal. Sihanoukville itself is a construction site in many parts.

Nearby

Sihanoukville lies west; Koh Ta Kiev is offshore.

Key facts

Established1993
Area210 km² (81 sq mi)
Location10.5064° N, 103.7344° E · map

Source: Wikidata, item Q4930573, read on 18 October 2026.

What to pack for Ream National Park

Chosen from what this place is for. Tap a kit for the full checklist.

  • Broken-in walking shoes or boots - Grip and ankle support matter more than looks; never hike in brand-new boots. Find on Amazon
  • Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
  • Binoculars - The single best wildlife tool - even a compact pair transforms a sighting. Find on Amazon
  • Layers + a waterproof shell - Mountain weather turns fast; a packable rain jacket saves the day. Find on Amazon

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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.

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