So I have had my Montana 600 for a couple of days. I had downloaded Basecamp and several maps before receiving the GPS. I installed the maps, including one open source routable street map. When using the unit to navigate on the road, the results were less than impressive. Yesterday, I broke down and purchased City Navigator 2013. I found it to be MUCH better than the open source maps that I've found. I had also downloaded a California topo map, which didn't show very many trails at all, and seemed to never know where I was during my dirt bike ride yesterday. I'm considering paying for the 24k Topo West maps, but I want to see if the City Navigator has improved anything before doing so.
Does anyone have recommendations for GOOD topo maps (with trails) for California? The ones I've tried have all been disappointing.