Start behind the juniper, delicately move up slick thin finger crack. The crux is about 6 feet up, and can be protected with cams and an attentive belay, or be bold. Half way up the cliff, you'll reach a big ledge. On the FFA, Kor went left, to Upper Kor's Crack (5.9), but continuing straight up on Gymnast (5.8) is the most obvious choice.
Attention: this crack will eat your cams if you let them walk in. 2 are stuck in there, and have been for years.
The original 5.9 rating is a bit of a sandbag, as with many "5.9"s Layton Kor put up in the western U.S. Clark's guide calls this 5.10d- which is an overestimate in my opinion this climb is easier than every 5.10d, 10c, or 10b at the Playground and the Old New Place. The difficulty is very likely subjective to the size of your fingers (bigger is probably better) and your confidence in trusting your feet in the slick corner.
Location
Just left of the point of the cliff, Lower Kor's is the thin finger crack starting behind the juniper. It is route #15 in the Potrillo miniguide
Protection
Cams to 2". You might place a nut too perhaps. 2-bolt anchor, reachable from the top, was installed to prevent further damage to trees.