We'll need to start with this Gateway. This location is key, as it is right next to the pillar that goes up to Zinyak's Mothership. (Or the main server, whatever.)

Start by running up the pillar as high as you can. You should get to a point that looks like this:


When you get there, equip the Mech Suit by going into your phone. Now jump jet up. For some reason, the mech suit can bypass the height limit.

This is probably the most difficult step. While you're jumping up, there will be a little nook in the tower just above the red barrier that looks like this:

You can land in this. You will need to refuel here, or you will fall all the way back down, if your lucky, on the platform. If not, you will crash into the ground and need to climb all the way back up.

Now jet out of the nook holding spacebar the whole time. This is important, as you will not have enough fuel to get up to the next ledge. It looks like this: Land up there.

Now we walk to the back of the platform. If you have your suit maxed, you should be able to jump up to this platform:






Now refuel and jump the rest of the way up. Now you're at the highest point of the map! Congrats!

This technique does not use the mech suit, so if you do not have it, this is for you.

Start in the same location as Technique 1, or around there. Summon a Void, or UFO. Fly to the ceiling, and get out. Quickly, hold space and jump as high as possible. You can glide to the tower and run up.