Thanks Steve!
The way from Iceberg Lake is via Whitney/Russell pass and the south arete, which is much longer but the funnest, according to a guide I met on the trail. That's on my list, and so is the north ridge.
To get to UBSL in that time is to not miss the easier creek crossing between LBSL/UBSL, which is right at where that massive rock rests. Cairns point people around it, which leads to bush whacking and bouldering. Although being my 7th time up this trail, I missed it and wasted 10 mins trying to hike around it until realizing this. That crossing is even a waypoint on my InReach.
I was only at Upper Boy Scout Lake for ~30 minutes refilling water and resting.
From UBSL up the scree, I veered off the ideal way and wasted maybe 15 mins this time (need to pass through the right two rocks), but still took me just under 2 hours. That's the worst part of the entire journey except for the drive up the 395. Someone I met at UBSL a month ago was able to make it up the scree in ~45+ mins.
The hike across the Russell/Carrillon pass took me maybe ~20+ mins.
I took my time on the class 3 to the summit because of the exposure and it being my first ascent.
