Beglika (Bulgarian: Беглика) is a small reservoir in the Western Rhodope Mountains of southern Bulgaria.

[1] Beglika is situated immediately under the dam of the Golyam Beglik Reservoir and serves as a seasonal equalizer of waters from the catchment of the Beglishka reka, a tributary of the Devinska reka in the Vacha drainage.

The main outlet is a pipe with a diameter of 600 mm and a capacity of 3.0 m3/s.

Beglika has a pumping station, through which its waters are pumped into the main pressure derivation of the Batak Hydro Power Plant or are diverted upstream to Golyam Beglik.

[1] The reservoir is located 2 km southeast of the Beglika Reserve, established in 1960 to protect old-growth forests of Norway spruce (Picea abies), [2] which contains the only populations of Dasiphora fruticosa[3] and Astragalus alopecurus in the Balkans.