Isn't Crook Peak Rift just a trench, so not really a cave...
You may be right, not actually pinned it down, (don't own a gps, not rich enough)
as you get towards the summit of Crook Peak there is a shallow groove, perhaps it is Crook Peak Rift,
a little nearer the summit, usually in very dense brambles, is a rift, next to a little escarpment,
with a minute cave.