Originally Posted by
davewill
Another quick note: You can't buy Russian train tickets more than 30 days in advance
45 days in advance for origin and destination stations. 3 days in advance if you want to start at some intermediate station.
And if you're ready to go through the whole rigmarole of ordering tickets online, paying a surcharge and then still getting the actual tickets at the station, and can find someone who speaks Russian to help you navigate the site - you could buy your tickets at
www.rzd.ru