A family picnic in Russia.

Grand Duke Ludwig, father of Ella, is at back of his younger daughter Princess Alix (future Alexandra Fedorovna). By Alix's side is Ekaterina Schneider, and then Grad Duke Sergei. Also Prince Ernst Ludwig, brother of Ella and Alix, is lying in the front playing with a dog.
My guesss the year is 1888, and the place is Ilynskoe.