Stealth skill while mounted

[My2Cents]

If you want to use the stealth skill while mounted do you use the mount's skill level or the rider's?

[Benchak the Nightstalker]

Definitely mount's, unless you've got some ability that allows the mount to use your check (I can't think of any such ability of the top of my head, but it might exist somewhere).

Your mount might also need a trick for that.

[Rathendar]

I'd use whichever was lower, and allow the higher to aid another