The Lower Slabs Rock Climbing

From the campground/parking area, hike up the canyon trail for about 1-1/2 mile and then leave the trail and trudge up the steep slope to the cliffs on the east side of the canyon. The point to leave the trail is about 1/2 mile past the third stream crossing. If you pass the wilderness boundary sign you went too far. The routes are on a cliff band directly below the huge, obvious, clean tombstone shaped wall, the Banshee Wall, looming above.
If you're lucky you'll find the cairns. The section of cliff to aim for is roughly at the highest point that the forested slope reaches up into the rocky canyon wall. Some final scrambling is required to gain the ledge system at the base of the routes.

This approach takes about an hour if you know where to go.