How to create a segment using Strava
First select the route you want to create a segment from.
Scroll to the bottom of the page and click Create new segment
Move the start Green and Red markers to the right section of your selection
Zoom in on the map to check the accuracy of the start and finish and adjust then click next
Select Create My Route
Uncheck make the segment private and name the segment
From the dashboard My segments you can check that you have created a segment
Are there other useful segments that you can create from your route, climbs, segments between
landmarks or down hills.