From the RubiconTrail.org website:

HAM Radio, or Amateur Radio, is the gold standard for communication on the Rubicon Trail. CB’s and Family Radio may work for short distance communication, but are not particularly useful when you need real communication. Remember you may be on your own out there, with absolutely NO cell phone coverage. If you need to call for help or a medical problem, Ham Radio or satellite phone are your only options. Satellite phones work fairly well, but are expensive to buy and use, and won’t work to call other trail users. A license is required to operate a HAM Radio!


Ham Radio Frequencies commonly used in the Rubicon

146.805 -.600 PL123.0
The KA6GWY repeater, covers the west slope of El Dorado County and the Sacramento area.

145.350 (repeater transmitter), odd split to 146.205 (repeater receiver), PL123.0
The Tahoe Basin KA6GWY repeater, linked 24/7 to the 805 ELD repeater, coverage in the Tahoe Basin.

146.805 simplex, no PL
This is the repeater output frequency of the KA6GWY repeater. Nice to have so that you can talk to
your friends right in front of you, still listen to the repeater, but not tie it up when simplex will work just fine.

444.9875 +5.00 PL156.7
The Rubicon repeater located near Spider Lake, coverage on all of the Rubicon Trail except east of Barker
Meadows OHV trail.

444.9875 +5.00 PL 107.2
Same as RUBI except that when using this PL it links to 805ELD and 805 TAH.

444.9875 simplex, PL107.2
This is the repeater output frequency of the Spider repeater. Nice to have so that you can talk to your
friends right in front of you, still listen to the repeater, but not tie it up when simplex will work just fine.
Note, PL is used because some users decode PL on their handheld radios.