"Marathon Kalanzha" is a mountain running event that has been organized annually since 2016 in the village of Sinemorets, located on the southern Bulgarian Black Sea coast, near the protected area of Silistar. The event represents a significant sporting experience that attracts participants eager to compete in a unique natural setting. Since 2021, the start and finish of the race have been relocated to the picturesque Veleka Beach, offering three different distances for participation, allowing runners of varying experience and preparation to find their place in the competition.
