http://www8.garmin.com/support/collection.jsp?product=999-99999-12

The link above is to POI loader from Garmin. There is a version for Mac as well. Once installed it will give you instructions on how to import the file above

Turn on your Garmin GPS device and connect it to your computer.

Open POI Loader and click Next.

Make sure the appropriate device appears in the Device field. If not, click Find Device. If you have multiple devices connected to your computer, select the device you want from the drop-down list.

Click Next.

Select "Install new custom POI's onto your device."

Select the directory where the data files can be found. POI Loader detects all .csv and .gpx data files within that directory.

Select the appropriate units for distance and speed (Feet and MPH or Meters and KPH).

NOTE: POI Loader uses these units to interpret the data within the data files. If you select units that are different from the units used in the data files, your speed alerts will not be accurate.

Select Manual and then click Next.

Adjust the settings for each individual data file:

If you want to ignore certain files, check "Ignore this file?".

If the file contains proximity alert points, check the appropriate box. You want to do this.

Select alert settings:

To set a speed alert, click Alert when speed is greater than the Alert Speed and enter the speed at which you want to receive an alert. This is totally up to you.

To set a proximity alert, click Alert when you get close to a point and enter the distance you want. I recommend 1/4th mile 

Click Next.

Repeat Steps 8–9 for each data file you want to load. After you choose the alert settings for all data files, POI Loader installs the POIs on your device. 

NOTE: This replaces any existing Custom POIs installed on your device.

Click Finish.