Jump on it
This is a jumping map that was made by me and a couple friends(Incarnadine Soul and Dak 393).
It is in the skybubble of sandbox and features many different types of jumps.
This map is meant for one person but can be played with as many people as you want.
make sure everyone is on the same team to prevent killing
That's about it for an explanation and here are the links:

Gametype:Bungie.net : Halo 3 File Details
Map:Bungie.net : Halo 3 File Details
Now onto the pics:

Overview #1

Overview #2

The spawn area.

Starting jumps with a slide jump after

Shoot the pallet and jump off the pieces simple right?

Grenade jump off of a turret?

Upside down turrets

First checkpoint

Pallet jumping and second checkpoint

Edge ghost with some baracades after

Move quickly or die

Trust me it's harder than it looks

One final edge ghost before the end

The end. Can you reach it?