The Hostivař reservoir is surprisingly beautiful. I had always associated Hostivař with an image of drab student dorms in concrete towers, so I was astonished to discover a large and beautiful lake there, edged with a beautiful sandy beach, and nestled in a forest. It’s the largest lake in Prague, created by a dam on the Botíč river, and it’s an ideal place for a relaxed run. The route begins at the Švehlova tram stop (22, 26) and follows the meanders of the Botíč through the Hostivař-Záběhlice natural park, past the dam and along the full length of the lake. This there-and-back route is 4km each way, although you can make it shorter if you wish.