Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for determining a context of the current search session. In one aspect, a method includes identifying query paths from previous search sessions, each query path defining a context and being a plurality of queries in an order in which the queries were provided for in a respective previous search session; identifying search session queries of a current search session; comparing the search session queries of the current search session to the queries in the query paths from the previous search sessions; and determining that a context of the current search session is related to a query path from the previous search sessions based at least in part on the comparison, the determining including: determining that two or more of the queries of the query path are similar to two or more of the search session queries.