topo map apps

I used to get a lake topo map of Lake Coeur d' Alene on my Scoutlook app on my Mac Book. I cant seem to get the lake contours anymore.
Any recommendations for free web based lake topo maps.

Try the Navionics web app at https://webapp.navionics.com/?lang=en#boating@9&key=k%60oaHvnqgU . I take screen shots of the bathymetric maps which are available on this website, paste them into a Word document, and save them on my computer.  Then I print them off and laminate them for use on the water.

Try the Navionics web app at https://webapp.navionics.com/?lang=en#boating@9&key=k%60oaHvnqgU . I take screen shots of the bathymetric maps which are available on this website, paste them into a Word document, and save them on my computer.  Then I print them off and laminate them for use on the water.

Thanks, I'll check that out.