Maps for alberta lakes

[firth5]

I have Hummingbird Helix 5 DI GPS, and I am looking for a compatible map chart for it that includes St. Marys reservoir. Hopefully one of you can help me!

[EZM]

There are painfully few lakes properly mapped on any map card out there - so what you are likely to get is very general contours.

You can see a list of lakes on the Navionics website.