Masleniza in the art park Nikola Lenivets. They will burn a huge wooden and straw tower (about 20 meters high). There will be games, traditional tree climbing, ice skating, restaurant and of course the fantastic landscape and the great art objects!
Have a look at: http://maslenitsa.nikola-lenivets.ru/?item=313
It’s starts already about 10-12 o’clock. And the burning of the object will start at 17.00. Tickets are costing 650 roubles when you order them online and 1000 roubles at the entrance.