Slippin' into Darkness 

I thought this was much easier and there is a second pitch that takes you to the big ledge. The actual crux (about 5.6) is right off the belay ledge.

All gear, except for the belays.

I might be thinking of a different route....I think this one is also called Slipping Into Darkness? Or at least the one I tried to add to the database. It's only one pitch; are you familiar, Chris?

Yes, there are three "Helmet Buttress" routes. I believe the standard is a 5.6 that starts in a right-facing corner on the left side of the helmet feature. "Helmet Variation" takes a runout 5.8 line more or less up the middle of the helmet, and "Slippin' Into Darkness" goes up the classic right-facing corner on the right side of the helmet. This one sounds like the one that's described in the description.

I did the 5.6 flake and continued to the big ledge. Didn't do any of the other variations.

I find Slippin' to be quite easy for the grade - I think it's more like 5.8. Still, good fun for a few moves.