This is day 3 and 4 of a 4 day trip (day 1 + 2 here), but shows a bit on what it's like to scramble up Gash Ridge. I found this route exceptional - if it wasn't so hard to descend from, it would be a total classic. Being hard to finish where you started, it stays somewhat obscure although completely obvious.

I managed to loop it in a somewhat strange way by starting from Lake Como, and (yadda yadda) summiting California Peak, then dropping into the east side of the range by Lost Lake. From this subsidiary ridgeline off California to Lost Lake, the terrain is steep and loose but I guess doable (0 stars). See the GPX track embedded for some ideas.

I had in the past taken the "Class 4 sneak" off of the Blanca/Hamilton saddle to get to Lindsey when starting from Lake Como and the experience left me wanting - I don't suggest that route for anyone - really loose steep (and imo dangerous) gulley, then a real hike around the Winchell Lakes to get close to Lindsey. Plus, as I write, it's off-limits.

On that trip, I then ascended California Peak in a more direct manner (also don't suggest my line - seemed steeper than it needed to be). I've documented this in my Fastpacks from Hell, Sierra Blanca post.

Also having linked Blanca with Ellingwood Peak, there is a pitch on the north facing ridgeline off of Ellingwood that would more difficult (imo) than anything you'll find on Gash Ridge, so taking the ridge from Blanca down to California is also not an easy day (in case there are those trying to link up all the Centennials in the area).

I found the quality of the rock on Gash quite good for the alpine and the scrambling fairly reasonable. I am a climber of reasonable technical level, so your experience may be different if you're not used to ledge-y steep terrain or slabby... slabs. Do be aware that Vaughn Fetzer lost his life on or near Gash Ridge a few months after I had visited the area.