This isn't a great climb, but it is a way up to set up a top rope at the TR anchor. Another way would be to climb Slick Rock Cracks.

Start by climbing up the large unprotectable flake to a good stance where you can finally protect. There probably should be a bolt along there. Continue to climb under the arch, mainly face climbing, runout at times, to the anchor at the apex. You can lower off with a 70 meter rope but tie a backup knot at the end of the rope and be careful! It is close.

This is the left-side of the Crystal Rock Arch which arches over the Crystal Crescent climb.

On the topo image found under "Nap Wall Area", this is climb number 2.

Standard rack