Monarch has a few, and they aren't of the type that somebody is going to be upset with me for sharing their "stash," so...
1. See the cut run that is not named just lookers right of Tumbelina lift? Its the old lift line for the Poma. It hides out unless you are looking for it, and is a narrow (about 12 feet wide) intermediate run. I'm not aware of any local names for it, I thi9nk most people just call it the Poma line.
2. One pretty much every little kid knows is Pinball. At the intersection of Turbo and Sleepy Hollow, follow the gully into the woods. It gets a lot of traffic, so you will probably see people queuing up here. It is a luge track type run that takes you over many treefalls and rocks- great fun for a kid skiing 130 CM skis. the run ends at the base of Mirage.
I guess at Wolf Creek I would call the numbers chutes hidden runs, and then there are marked runs that never really get traffic, like Sleeping Beauty.