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http://caltopo.com is the most powerful, free online topo mapping software I know of. It essentially provides a google maps - like interface for navigating an array of different maps, including USGS. The print function is amazing.



CalTopo is awesome... that's who we get USGS maps from for gaiagps.com.

I can say with some pride that the reason CalTopo has nationwide coverage is because we made a deal with them a long time ago to get that done. Matt originally set up CalTopo for his search and rescue efforts in California, hence the name!


As someone that goes rock climbing/hiking often and has to rely on remembering maps, I can't thank you enough for providing this link.


As someone who does the same, I use this pretty much on a weekly basis :) I hardly look at my Garmin maps anymore.




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