Catalins island is 63 miles off the coast of Los Angeles, California. There is one lone radio station on that island. KISL-FM operates at 88.7 Mhz with 200 watts ERP. It covers the city of Avalon quite well, and can be heard 26 miles away along the coastline and also in the mountains of Southern California as well.
check out their webcam:
KISL's tower is on a hill above the town of Avalon and the Avalon Harbor. It was a hot July 5th when I took the one-hour trip by jet boat to Catalina Island with installation gear and Ken Horton as my able assistant. David Markowitz and Ron Thompson formerly of the legendary KLON built this little gem pretty much by themselves I am told.
check out their webcam
antenna pics here: http://www.well.com/user/dmsml/kisl/