This is a list of the longest walks that have occurred in groups and on solo or duo projects.
The difference is that the former is tougher to organise logistically, especially when crossing international borders, since there generally needs to be greater accommodations and more thorough approvals for a group.
There is also a tougher process of decision making with even a small group than with one or two people.
There is a separate section for long runs and wheelchair expeditions that were not walks.
The length of some usually relates to the difficulties of securing access to walk in certain countries.