From the Point Reyes National park website:
July 12th every year
from 3 pm to midnight
at the Historic RCA Coast Station KPH
In the annual “Night of Nights”, historic Morse code radio station KPH returns to the air in commemoration of the closing of commercial Morse operation in the USA.
Frequency and reception report information for all stations appear at the Maritime Radio Historical Society website.
KPH, the ex-RCA coast station located north of San Francisco, returns to the air for commemorative broadcasts every year on July 12 at 5:01 pm PDT (13 July at 0001 GMT). On July 12, 1999, the last commercial Morse transmission in the U.S. was thought to have been broadcast at 5 pm PDT (13 July at 0000 GMT). Now the Maritime Radio Historical Society’s own KSM carries on the tradition of commercial Morse. Transmissions are expected to continue until at least midnight PDT (0700 GMT).
Members of the public are invited to visit the receiving station for this event. The station will be open to visitors beginning at 3 pm PDT. The station is located at 17400 Sir Francis Drake Boulevard and is on the route to the Point Reyes lighthouse. Watch for a cypress lined driveway on the right about a mile past the entry to Coast Guard station NMC.
Directions to Bear Valley Visitor Center
Directions from Bear Valley Visitor Center to Historic RCA Coast Station KPH