Hello, i’m prototyping an endless runner and i want to have box trigger portals for the turns. The track is procedurally generated. The picture below is a basic understanding of what i’m trying to do.
any help would be greatly appreciated
Okay, so what’s the problem? 
indeed, i think you may be using some custom terminology we don’t have access to such as what a portal means to you in this sense and why putting a volume and using it as a trigger does not work for you as stated?
id say instead of using a trigger box, make a blueprint with a box collider or an invisible cube, that should work a little better, then you can spawn them over time. Also, you should make a cast to your player blueprint, because as of right now, anything that overlaps this trigger box will force your player to transport. Im not entirely sure if i read your problem correctly but i hope that helps
Drag out the blue pin from the overlap, cast to your player blueprint, then take that bluepin and plug it into target