Quick question re: UF protagonists


Is there an urban fantasy series featuring a much-older woman? I have a few UF novels on my to-read pile–and of course I see many in the stores–but the women on the covers seem to be in their thirties or younger.

Is there a Miss Marple (meaning, in her sixties or older) in urban fantasy, even a motorcycle-riding, katana-wielding Miss Marple?