When in a National Park, I like to be able to communicate with Park rangers over my radio. Because the FCC says that I’m not authorized to transmit on their frequencies (except in the case of an emergency)1, this usually means I’m listening in. But if I have their frequencies programmed into my radio, I can reach out to them should an emergency arise!

Here are frequencies2 for the parks I’m most likely to visit

Channel Islands National Park

I think that Island Packers, the boating company that holds the concession for transporting the public to the from the islands, operates on one of these frequencies, too. At least they use one of these frequencies to talk with rangers. (Now that I right that it seems too obvious.)

Frequency Input # License Type Tone Alpha Tag Description Mode Tag
171.70000 163.33750   RM 100.0 PL CINP YNEZ Rangers - Santa Ynez Peak (input 156.7 PL) FMN Federal
171.70000 163.33750   RM 100.0 PL CINP DIABLO Rangers - West Santa Cruz Island (Mt. Diablo) (input 123.0 PL) FMN Federal
171.70000 163.33750   RM 100.0 PL CINP FBI Rangers - East Santa Cruz Island (FBI) (input 146.2 PL) FMN Federal
171.70000 163.33750   RM 100.0 PL CINP SISAR Rangers - Sisar Peak (input 127.3 PL) FMN Federal
171.70000 163.33750   RM 100.0 PL CINP SNICHOL Rangers - San Nicholas Island (input 141.3 PL) FMN Federal
167.17500 163.33750   RM 131.8 PL CINP Simulcast Simulcast of 171.700 FMN Federal
166.78750 172.40000   RM   CINP Ranger 2 Rangers 2 FMN Federal
171.67500         CINP Ranger Tac Rangers Tac FMN Federal

Santa Monica National Recreation Area

Frequency Input # License Type Tone Alpha Tag Description Mode Tag
169.78750 162.23750   RM 127.3 PL SMP Solstice Solstice Repeater FMN Federal
171.72500 164.16250   RM 110.9 PL SMP Laguna Laguna Repeater FMN Federal
172.52500 164.16250   RM 110.9 PL SMP Castro Castro Repeater FMN Federal
172.52500     RM 455 NAC SMP P25 P25 Mixed Mode P25 Federal
172.57500     RM 110.9 PL SMP Net Net FMN Federal

Other parks

These and other NPS frequencies can be found here on this RadioReference.com site.

  1. If I were to have an authorized NPS employee program NPS frequencies into my radio, then I could use my radio to communicate in other non-emergency situations. 

  2. Markdown tables for this page were made using the online tool at tablesgenerator.com