WARNING - There is a possibility of overwriting existing MapSource data or custom maps on your GPS when uploading IMG files to your GPS. DO NOT overwrite any existing map data when uploading this custom map. Use this data at your own risk.
MNDNR is providing IMG files only. The download below contains one file, which you can upload to your Garmin GPS.
If you have an older Garmin GPS unit which does not support drag and drop direct file transfer, you will need software to upload the IMG file to a Garmin GPS. One available free software package is: Mapwel's MAPupload.MNDNR does not support or endorse this product but we did test our IMG file with this software and found it to work.
Files were last updated January 13, 2017.