If you’re passing through Boise on I-84, you’ll have about 30 miles of good iGate and digipeater coverage. Coverage from Boise south to Mountain Home is not very good.

Boise, Idaho APRS Coverage

Most of the metro area is also covered, but you’ll need 10 watts and an external antenna for the best reception.

As you zoom out a bit more, you can see the gaps in coverage from Mountain Home to Boise, and also from Ontario to Baker City.

Southern Idaho APRS Coverage