The easiest way to get there is to hop off Olympic chair, go left, and then drop in under the out of bounds rope and ski to the a little zig zag line a little left then cutting over to the right.
If its your first time through, recommend staying over to skier's right. You can get cliffed out over to skier's left (actually, a really sick cat track gap). If you stay to skier's right, you may miss the cliff and hit the cat track, but when you ride the cat track out, you will see the cliff and know where to go next time. Alternatively, you can hike up the cat track to find where the cliff is (maybe 8 - 10 min walk, it drops in right above the road), then go back and ski into it next lap.
Be warned, ski patrol is hateful and unpredictable. Who knows what shit they will spew. But if there are problems, be assertive that you are allowed to ski out of bounds in BC, and that if they don't want to you out there, its their own damn fault for not marking it as closed. Be polite, but do not kowtow to them.
You are better off riding the Ridge as its easier to keep away from ski patrol. But that north side cliff is the best one on grouse, excluding thrasher creek.