St Marks from the highway
I found a way up Saint Marks from the highway. Start S side of Newman creek (lots of parking on N side of creek) and head south at the top of the road to a poorly defined trail going S and up past the power lines. Once above the cut, head up and left to find my poorly flagged route up to intersect the mountain abyss traverse trail. Continue up (some flagging) keeping the rock fall to the right, then follow the fall line up to a pleasant lookout and narrow wooded connector to the next steeper feature.
This is where I came to snow. At this point, I traversed up to the right, crossing a steep gully and found the opening shown on the GE attached. That pitch had rotten snow that exposed deep holes to the rocks below; not much snow this year at this elevation. A few minutes later I came out on the exposed ridge that narrowed down to less than 6 ft across for quite a while. I was there with a snowstorm coming through, so there was no view, but in the mist could see huge drop offs on both sides.
As the spine melded in to the slope, head up and left to come to a ridge, then straight up. The route steep sections were mostly 30-40 deg, the last exit maybe 50 deg. I had full crampons and ice axe, footing was good. Some high exposure from a slide. I have no idea if the top exit will go in the summer without the snow. Only 4 hours up, but I was too tired to go back the same way, so I went back to Cypress Bowl and got a ride instead.