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Angeles National Forest (ANF - Forest #01) KME 2-2

The Angeles National Forest is located in the San Gabriel Mountains of Los Angeles County in southern California. It was established on July 1, 1908, incorporating portions of the San Bernardino National Forest and parts of the former Santa Barbara (now Los Padres) and San Gabriel National Forests. It covers 655,387 acres and is located just north of the densely inhabited metropolitan area of Los Angeles and adjacent cities.

The Angeles National Forest manages the habitats, flora and fauna ecosystems, and watersheds of the largest open space in Los Angeles County. Some of the rivers with watersheds within its boundaries provide valuable groundwater recharge water for Southern California. The existing protected and restored native vegetation absorb and slow surface runoff of rainwater to minimize severe floods and landslides in adjacent communities. Most of the forest is covered with dense chaparral, which changes to pine and fir covered slopes on the peaks of the higher elevations. The land within the Forest is diverse, both in appearance and terrain. Elevations range from 1,200 to 10,064 feet. Many people do not realize the ruggedness of the San Gabriel Mountains and its dangers due to its proximity to the huge southern California metro area. Often, people who have lived in southern California for decades, have never visited this National Forest, When they do they are quite surprised at the relative solitude available in some of the more remote areas it contains.

The residents of Los Angeles County are located within a two hour drive of the forest and the 16 million residents of the five county southern California metro area are within a half day drive of the Angeles. It is likely that the frequent largest gathering and concentration of people of any area of National Forest land in the U.S occurs in San Gabriel Canyon . Traffic accidents on the Angles Crest Highway, human caused fires, law enforcement, search and rescues occur at a rate not seen on any other National Forest. The close proximity often leads to crimes being committed on the forest. An oft repeated joke about this forest is that if every dead body on the Angeles got up and started walking, the population of L.A. County would increase by 10%! This is an extraordinarily difficult forest to manage. The Angeles is divided into the Los Angeles River (District 1), the San Gabriel River (District 2), and the Santa Clara/Mojave Rivers (District 3) Ranger District, with the Forest Supervisor's Office in Arcadia.


Most radios on the forest have 9 frequencies in common: ANF Channels 1 and 2 (Forest Net), ANF Channels 3 and 4 (Admin Net), two National Air to Ground frequencies and NIFC tactical channels 1 through 3. Each ranger district and crews within each ranger district, may have different channel lineups, but they will usually have these nine in common. The variations between ranger districts and crews involve frequencies belonging to other agencies such as Los Angeles County Fire, San Bernardino County Fire, Cal Fire, and the Bureau of Land Management, as well as frequencies of adjacent National Forests. The agencies and areas that each ranger district interact with for mutual aid are different for each district.

ANF Channels 1 and 2 are called the "Forest Net" and are used primarily for fire and emergency traffic. ANF Channels 3 and 4 are called the "Admin Net." Channels 1 and 3 are simplex frequencies and channels 2 and 4 are repeated.

When users transmit on channels 1 and 3 using tone 8 (103.5 Hz) their transmission can be received by dispatch on the forest's 9 microwave linked remote bases. These remote bases are linked to dispatch located at Fox Field near Lancaster and the Forest Supervisor's Office in Arcadia. Most of these remote bases are co-located with repeaters and some are not. When someone communicates to dispatch on these channels it is not picked up by a repeater and receiving them requires being close enough to receive simplex traffic. On the other hand, if users transmit on channels 2 and 4, the tone in use must match a repeater within range or their transmission will not be heard. The Angeles National Forest radio system is comprised of 13 repeater sites situated on various mountain peaks in and around the forest which are linked to the dispatch center at Fox Field near Lancaster. Each repeater site functions as both a repeater and as a receiving antenna for dispatch. The input or repeater selection tone is not transmitted on the repeater output frequency, rather all repeaters transmit Tone 8 (103.5) on the output

The 9 remote bases are located at: Fox Field (dispatch office), Arcadia (Forest Supervisor's Office), Frazier Peak, Warm Springs, Magic Mountain, Mt. Lukens, Blue Ridge, Johnstone Peak and Santiago Peak. Those remote bases that are not co-located with a repeater are: Fox Field, Arcadia, Warm Springs and Blue Ridge.


The unit identifiers follow the function name, district, and position number system. The Angeles Interagency Dispatch Center provides dispatching for the forest and the National Park Service - Santa Monica Mountains National Recreation Area. NPS unit IDs for the NRA begin with "7." It is a 24 hour operation. Its identifier is "Angeles."

Channel Plan

Angeles National Forest Channel Lineup
Channel Tone(s) Rx Tx Alpha Tag Description
1 8 172.3750 172.3750 ANF 1 Frst Dir Forest Net Direct
2 1-14 172.3750 169.9500 ANF 2 Frst Rpt Forest Net Repeat
3 8 164.9375 164.9375 ANF 3 Adm Dir Admin Direct
4 1-14 164.9375 170.0750 ANF 4 Adm Rpt Admin Repeat
5 169.1125 169.1125 ANF 5 A/G 59 Southern California Primary Air to Ground National AG 59
6 168.4875 168.4875 ANF 6 A/G 53 Southern California Secondary Air to Ground National AG 53
7 168.0500 168.0500 ANF 7 N Tac 1 NIFC Tac 1
8 168.2000 168.2000 ANF 8 N Tac 2 NIFC Tac 2
9 168.6000 168.6000 ANF 9 N Tac 3 NIFC Tac 3


ANF Repeaters
Tone Location CTCSS Tone
1 Mt. Waterman 110.9
2 Santiago Peak 123.0
3 Mt. Hawkins 131.8
4 Frost Peak 136.5
5 Not Assigned 146.2
6 Oat Mountain 156.7
7 Josephine Peak 167.9
8 Frazier Mountain 103.5
9 Pine Mountain 100.0
10 Burnt Peak 107.2
11 Magic Mountain 114.8
12 Mt. Lukens 127.3
13 Johnstone Peak 141.3
14 Grass Mountain 151.4

Return to DB page: United States Forest Service (CA)
Return to Wiki page: California (US), US Forest Service