Holiday Beach Budapest is a hotel, located at Budapest, Piroska utca 3-5, 1039, Magyarország. They can be contacted via phone at +36 1 436 7160, visit their website www.beachklub.hu for more detailed information.
Not much of a beach, not much of a holiday! Beware their restaurant - it's heavily overpriced for what it is!
If you want to go for a run, go left by the Danube. Soon you'll come to nice running path.