Climb up the normal rap route from the top of the Citadel. It's a steep enough slab to be interesting with enough features for it to be climbable in any number of ways. Even easier ground can be had to the right, more difficult to the left.
This route went by "Not Quite Down" for a time before it's original name was uncovered in an old topo.
On the smooth south-east face of the Citadel.
Best top-roped from the two-bolt anchor above, but protection is possible and it may well be the easiest way to reach the top of the Citadel for someone who is peak bagging.