A long-ish dayhike of this and Glacier Ridge out of Marvin Pass. The ridge is mostly class 2-3, easy to follow, and both aesthetic and fun. I tried to go down Eckert's Blowhole but, failing to find it, instead made some low 5th class thing work. Trip report.
Fun three day backpack in from Marvin Pass TH with a bit of weather thrown in.
Once you're in the Blowhole things are fairly straightforward with a few fun but short 3rd class bits but we had some issues getting to that point. We ended up to far to the north along the ridge (but still before the trees) which led to some 4th class cracks and slabs but looked like it might have worked. Once we realized our error and hit the right ramp things went smoothly.
You can take a ramp to the left of the gully that skips the harder than 3rd class bits mentioned above.