Belarus Station, the Moscow rail terminal for trains from Belarus (Minsk and Brest), Kaliningrad, Smolensk and international destinations including Vilnius, Warsaw, and Berlin, is a little over 7km from the Holiday Inn Moscow Sokolniki Hotel.
By taxi
It will take 20-30 minutes to drive from the station to the Holiday Inn Moscow Sokolniki Hotel, and taxis should cost around $20 if you are willing to try negotiating a fare on arrival. Alternatively, you can book a transfer with a driver to meet you off your train here.
By metro
From Belorusskaya Metro Station, take the brown circle line and travel three stops clockwise to Komsomolskaya. Change to the red line and continue east one stop to Krasnoselskaya, which is around seven minutes' walk from the Holiday Inn Moscow Sokolniki Hotel.