Train is rather comfortable transport, and even famous russian pop stars, as Alla Pugacheva, often use train to get to Riga.

Train services run from Riga to Saint-Petersburg (once per day) and to Moscow (twice per day).

Reaching town from the train station

There is only one train station in Riga. It is located in the centre of town, 5-10 minutes walking distance from the Old Town next to the bus station and the terminus of fixed-route taxis to Jurmala (Jurmala can be reached by electric train or by fixed-route taxi).

Useful links:

Latvian Railway (LV, EN, RU)