In case you missed it: (stolen from the ARRL weekly letter)
Summits on the Air (SOTA) in North America has three events scheduled between August 4 - 7, 2023. The Colorado 14er annual event will run from August 4 - 7, the SoCal SOTAFest in Southern California will run from August 4 - 6, and the Pacific Northwest Not-Quite-Fourteener event will run from August 5 - 6, and includes climbers in Washington and Oregon.
Many different frequencies and modes will be used during the August events, but the recommended 2-meter FM frequencies have been changed to 146.58, 146.55, and 146.49 MHz to align with the use of the North America Adventure Frequency for SOTA (146.58 MHz). Operation is also permitted on select HF frequencies. The National Simplex Frequency (146.52 MHz) may also be used. Each event website provides a list of operating frequencies. All amateur radio operators and shortwave listeners are invited to participate.