Rathtrevor Beach Provincial Park, Nature reserve in Parksville, Canada.

Rathtrevor Beach Provincial Park is a coastal nature reserve on Vancouver Island featuring a wide sandy shoreline backed by forest and wetland areas. The landscape combines beach environments with wooded sections that support diverse plant and animal communities.

William Rath, an Irish-born prospector, settled here with his wife and a baby in 1886 and the family established a farm in 1895. The Raths later ran a private campground on the land, and in 1967 it became a provincial park. The beach property had passed through Clearwater Timber Products in a 1963 land-and-timber swap with the provincial government.

The name comes from the Rath family, who homesteaded here in 1886; they added "trevor" to make it sound more romantic. Long before settlers arrived, the area was a hunting and fishing ground for First Nations. Today the Nature House, run by RLC Enterprize, offers natural history displays and interpretive programs.

The park lies at the east end of Parksville, reached from Highway 19; the German source gives Highway 19A and a position about 3 km south of town. Camping sits in the wooded northwest, while the beach, picnic area and group tent sites occupy the east and southeast. The tide in the Strait of Georgia runs about 2 to 3 m, so time beach walks to low water.

The park's 1967 creation was tied to a land swap: the province traded timber rights in Wells Gray Provincial Park for 47 hectares of beach owned by Clearwater Timber Products. A 1964 investigation found the Rath family had sold the land for $150,000 a month before it was appraised at $186,000.