American Hiking Society

1422 Fenwick Lane
Silver Spring MD 20910
Phone: 301-565-6704
Fax: 301-565-6714
http://www.americanhiking.org/

American Trails

P.O. Box 491797, Redding, CA 96049-1797
Phone: 530-547-2060
Fax: 530-547-2035
http://americantrails.org/

Audubon Society (San Diego Chapter)

4891 Pacific Highway #112
San Diego, CA 92110
Phone: 619-682-7200
http://www.audubon.org/

Coastwalk

825 Gravenstein Hwy North #8
Sebastopol CA 95472
Phone: 707-829-6689
Toll Free: 1-800-550-6854
http://www.coastwalk.org

Backcountry Horsemen of California - Various Chapters

http://www.bchc.org

Caballeros del Sol

One of several Backcountry Horsemen of California units in the San Diego area.
P.O. Box 12311
El Cajon, CA 92022
Phone: 858 278-9088

http://www.bchc.org/cds

Cuyamaca Rancho State Park Interpretive Association (CRSPIA)

12551 Hwy. 79
Descanso, Ca. 91916

www.cuyamaca.us

International Mountain Bicycling Association (IMBA)

P.O. Box 7578
Boulder, CO 80306-7578
Phone: 303-545-9011
Fax: 303-545-9026

http://www.imba.com

Laguna Mountain Volunteer Association (LMVA)

c/o Cleveland National Forest - Descanso Ranger District
3348 Alpine Blvd.
Alpine, CA 91901
Phone: 619-445-6235
Fax: 619-445-1753

Pacific Crest Trail Association (PCTA)

5325 Elkhorn Blvd., PMB #256
Sacramento, CA 95842-2526
Phone: 916-349-2109
Fax: 916-349-1268
www.pcta.org

Ramona Trails Association

2433 Duraznitos Place
Ramona CA 92065
Phone: 760-789-1716
Fax: 760-789-1772

http://www.ramonatrails.org

San Diego Audubon Society

2321 Morena Blvd., Suite D
San Diego, CA 92110
Phone: 619-275-0557

San Diego County Bicycle Coalition

PO Box 34544
San Diego CA 92163
Phone: 619-685-7742

http://www.sdcbc.org

San Diego County Trails Council (SDCTC)

P.O. Box 1976
El Cajon, CA. 92020

http://www.sdctc.com

San Diego Mountain Biking Association (SDMBA)

P.O. Box 881491
San Diego, CA 92168-1491
Phone: 619-258-9140

http://www.sdmba.com

San Diego Multiuse Trails Coalition

http://groups.yahoo.com/group/MultiUseTrails

San Diego Sea to Sea Trail Foundation

PO Box 19413
San Diego, CA 92159-0413
Phone: 619-303-6975

http://www.seatoseatrail.org

Sierra Club, San Diego Chapter

3820 Ray Street
San Diego, CA 92104
Phone: 619-299-1743

The Warrior's Society of the Santa Ana Mountains

Dedicated to maintaining and improving the trails in the Santa Ana Mountains and Cleveland National Forest

http://www.warriorssociety.org

City of Carlsbad - Community Services

Recreation Department
1200 Carlsbad Village Drive
Carlsbad, CA 92008
phone: 760-434-2978

www.ci.carlsbad.ca.us

Anza Borrego Desert State Park

P.O. Box 299
Borrego Springs, CA 92004
Phone: 619-767-4205 (visitor center), 619-767-5311 (administration)

http://www.anzaborrego.statepark.org

City of Escondido - Public Works Dept. - Lakes and Open Spaces

475 North Spruce Street
Escondido, CA 92025
Phone: 760-839-4680

http://www.ci.escondido.ca.us

City of Poway - Public Services Department - Trails Division

P.O. Box 789
Poway, CA 92074
Phone: 619-679-5423

City of San Diego - Department of Parks and Recreation

City Administration Building, 9th Floor
202 C Street
San Diego, CA 92101
Phone: Coastal 610-221-8900
Inland 619-685-1300
Metro 619-235-1120
Northern 619-525-8222

http://www.sannet.gov/park-and-recreation

City of San Marcos

Community Services Department
3 Civic Center Drive
San Marcos, CA 92069
phone: 760-744-9000

www.san-marcos.net

Cleveland National Forest - Descanso Ranger District

3348 Alpine Blvd.
Alpine, CA 91901
Phone: 619-445-6235
Fax: 619-445-1753

www.r5.fs.fed.us/cleveland/

Cleveland National Forest - Palomar Ranger District

1634 Black Canyon Road
Ramona, CA 92065
Phone: 760-788-0250
Fax: 760-788-6130

www.r5.fs.fed.us/cleveland/

Cuyamaca Rancho State Park

12551 Highway 79
Descanso, CA 92016
Phone: 619-765-0755

http://www.cuyamaca.statepark.org

Olivenhain Municipal Water District

1966 Olivenhain Road
Encinitas, CA 92024
Phone: 619-753-6466

Palomar Mountain State Park

P.O. Box 175
Palomar Mountain, CA 92060
Phone: 760-742-3462 or 760-765-0755

http://www.palomar.statepark.org

San Diego County Department of Parks and Recreation

5201 Ruffin Road
San Diego, CA 92123
Phone: 619-565-3600

http://www.sdparks.org

The San Dieguito River Park - Lake Hodges

18372 Sycamore Creek Road
Escondido, CA 92025
Phone: (858) 674-2270
Fax: (858) 674-2280

http://www.sdrp.org

Sweetwater Authority

P.O. Box 2328
Chula Vista, CA 91912-2328
Phone: 619-420-1413 ext. 102

Tijuana River National Estuarine Research Reserve

301 Caspian Way
Imperial Beach, CA  91932
Phone: 619-575-3613
Fax: 619-575-6913

U.S. Bureau of Land Management

1661 South 4th Street
El Centro, CA 92243
619-337-4400

U. S. Department of the Interior - Fish and Wildlife Service

2736 Loker Avenue, West, Suite A
Carlsbad, CA 92008
Phone: 760-930-0168