English is not my mother tongue so I don´t know exactly wich is the difference between a tour and path in graphs theory context. I think that in both cases it is a way throught various vertex or points. Is this correct?
Walk - A sequence of vertices and edges, where the edges connect the adjacent vertices in the sequence
Tour - a walk with no repeated edges
Path - a walk with no repeated vertices
Source: CS 70 MT1 Review Spring 2018 @ UC Berkeley