The 'Side-by-Side' riding formation
Whereas, the stagger formation is
preferable in situations where there is limited road surface, such
as country roads with narrow lanes, roads with no shoulder, or in
the tight winding turns of many of Colorado's mountains.

The side-by-side formation (or
parade formation) is used by many Harley-Davidson riders when riding
in a group. The same spacing applies as in the stagger formation
with each rider 2 seconds behind the motorcycle directly in front of
him/her.
Again, it is important to maintain
your lane and not shift from right to left side and visa-versa. If a
gap in the formation should develop, riders should motor straight
ahead in their lanes to fill the gap.