When you are cycling for several days, like München-Venice or Way of St. James (Camino de Santiago), you consider every day a stage of one whole route experience.

Also, you can be hiking 2 days climbing a mountain, sleeping in a shelter, making it to the top, but in the end is one whole route in a mountain, made in 2 days.

It would be so cool to be able to group some individual strava activities in one route/experience/trip that in the end was just made in stages (but not merging them in one activity!). Or at least have one map displaying just selected activities.

e.g.: