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Mountain top AMATEUR RADIO ASSOCIATION MTARA MTARA Club Meetings Workshops and Field Training MTARA Club Meetings Workshops and Field Training The Mountain Top Amateur Radio Association MTARA is located in the communities within the San Bernardino National Forest including Crestline Lake Arrowhead Running Springs and Green Valley Lake California. We welcome members and visitors from any area. We are a group of licensed amateur radio operators and friends young and old The Mountain Top Amateur Radio Association MTARA is located in the communities within the San Bernardino National Forest including Crestline Lake Arrowhead Running Springs and Green Valley Lake California. We welcome members and visitors from any area.