High Sierra Topix

I have a garmin Eurex hc but no idea how to run it. I can worry out from the owners manual how it works, but I need to load a map to hike to Martha Lake. Can someone walk me through how to find and load hiking trail maps? Much obliged. And yes, I know this is trivial but I am a Luddite and find things like this near impossible. Please humor me.

Hope this helps: http://www.gpsfiledepot.com/tutorials/h ... -gps-unit/" onclick="window.open(this.href);return false;