This low-angle slab lies near the center of the Ribcage crags. The excellent online guide lists two routes up this rock.
Getting There
From the top of the Out of Darkness slab, clamber through the boulders and brush, heading generally up and left (west). Aim to pass near the base of Right Tower and keep heading west to the base of the Winter Solstice slab.
The Classics
Mountain Project's determination of some of the classic, most popular, highest rated routes for Winter Solstice Slab:
The routes Winter Solstice and Last Chance on Upper Dome can be nicely joined by heading climber's right after the knee-high grass-y-ish plant in the crack but before the very top of Winter Solstice. After heading right, drop into a kind of gulley at the point of the start of Last Chance.