Karadere beach, Natural beach near Byala, Bulgaria

Karadere Beach is a 5-kilometre stretch of fine sand on Bulgaria's Black Sea coast, about 5 km from Byala and Goritsa in Varna Province. The sand meets a line of white foam at the water's edge, with the sea behind. The beach is bordered by a mixed oak forest, vineyards and cultivated land, and the mouths of the Karadere and Byala rivers reach the shore.

Karadere takes its name from the Turkish words kara (black) and dere (gully). In December 2007 plans were announced for Black Sea Gardens, a Norman Foster-designed complex of five villa settlements with up to 15,400 beds. As of 2019 the project remained unrealized, and the beach is still one of the last stretches on the Bulgarian coast without mass tourism development.

The name comes from Turkish: kara (black) and dere (gully). Bulgarians gather here in large numbers to watch the sunrise on 1 July. Free camping is still permitted, with tents pitched on the sand or in the oak forest above the shore, and the beach is also used for topless and nude sunbathing.

Access is by bumpy dirt roads and tracks from Byala or Goritsa; no infrastructure, cell phone service, electricity, tap water or sewage. Bring water, food and everything you need. Firewood for camping is not available at the beach but can be bought in the forest along the Varna–Burgas road, 7–10 km away. The northernmost part is easier for caravans.

Sections of the beach are used by swimmers who prefer swimming without clothes, making it a destination for alternative beach experiences. This use has developed informally and adds to the reputation as a place outside standard seaside conventions.