There are some questions floating around about updating the maps on old Garmin GPS devices. Garmin builds a solid GPS with great hardware, but their map updates for older units is silly and expensive. The good news is you can download free, updated topo maps that are rotatable (turn-by-turn directions) and have way more detail than your old Garmin maps did. For some light reading about the Open Street Map (OSM), see https://wiki.openstreetmap.org/wiki/OSM_Map_On_Garmin/Download
GMapTool is my "go-to" OSM Topo map source for USA at the moment. Hopefully other users will contribute their favorite OSM map source.
http://www.gmaptool.eu/en/content/usa-osm-topo-routable
The process is somewhat cumbersome, but worth it once you get it figured out. These are the general steps for a Windows PC:
www.garmin.com
I have updated an old 60CSx, Montana 650 and even a cheap Nuvi. The Nuvi was really limited in the map size (only fit the state of Kansas on it) due to its small internal storage and no SD card.
Please share your experience and sources for OSM maps on an old Garmin!
GMapTool is my "go-to" OSM Topo map source for USA at the moment. Hopefully other users will contribute their favorite OSM map source.
http://www.gmaptool.eu/en/content/usa-osm-topo-routable
The process is somewhat cumbersome, but worth it once you get it figured out. These are the general steps for a Windows PC:
- Download Garmin Basecamp
- Download the OSM Topo map(s) you want
- Go to the folder you downloaded the OSM topo maps to and extract them
- Run the batch file, this automatically links the OSM maps to the Garmin directory in Basecamp
- To view the OSM maps within Basecamp, go to Maps > Check the map you want to view
- Plug your Garmin GPS into the computer
- Go to Basecamp and right click your GPS unit in the left side margin
- Install the maps you want on the GPS
How To Load Maps On My Garmin GPS Unit - GPSFileDepot
A tutorial detailing how to use Garmin MapSource to load maps to your map capable GPS unit such as the Gpsmap 60x(s)x, Etrex, Legend, Dakota, Oregon, Colorado, Montana, 62 series, and even the Nuvi.
www.gpsfiledepot.com
Download BaseCamp | Garmin
Download BaseCamp™ software to plan your outdoor activities, organize your data and share your adventurers with others.

I have updated an old 60CSx, Montana 650 and even a cheap Nuvi. The Nuvi was really limited in the map size (only fit the state of Kansas on it) due to its small internal storage and no SD card.
Please share your experience and sources for OSM maps on an old Garmin!
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