Somewhere deep in a backyard near the intersection of Zverinetskaya and Fortunatovskaya streets, off Partizanskaya metro station (Sokolinaya Gora District).
January First-of-May e-mailed me (vb) and Alexey Nigin with the suggestion for the meetup.
In short, January First-of-May and vb made it to meetup, while Alexey Nigin couldn't. The hash is inside the walled-off area, closest we got to was 33m.
Impressive Soviet era mosaic mural not far away from the hash
Horse chestnuts in bloom.