As you drive north along Highway 155 there are several spectacular frozen falls that are situated within deeply cut cirques; Zenith being one of them.
Watch for the cirque containing the obvious route between mile marker 14 and 15 along Highway 155.
The first pitch is very long, so bring a sixty meter rope. It is hard to setup a belay before the mid-point tier, so be prepared for some potential simul-climbing. The second pitch is much shorter and can be climbed on the left or the right, with the latter being the more challenging option.
"Ah, this is obviously some strange usage of the word 'safe' that I wasn't previously aware of."