Is there a maps app for WP?

I know there are plenty.

But is there one that allows me to save/pin as preference one or more routes that I want to walk from point A to point B that I plan at home and when I am at point A, I can open that map to see where to walk to reach point B?

Bing Maps doesn't let me pin or save.
Nokia maps on my Lumia has pin option greyed out all the time.

Any other apps?

theres a google maps based one called gmaps.
I dunno what features it has but it appears to be a very good google maps based app.