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American Bird Conservancy (ABC) is a 501(c)(3), not-for-profit organization whose mission is to conserve native birds and their habitats throughout the Americas.

The mission of American Farmland Trust is to save the land that sustains us by protecting farmland, promoting sound farming practices and keeping farmers on the land.

The mission of the American Littoral Society is to promote the study and conservation of marine life and habitat, protect the coast from harm, and empower others to do the same.

As the national voice for hikers, American Hiking Society helps preserve and protect the hiking trails and natural areas that hikers cherish and seek for exploration, exercise and education.

Founded in 1922, the AHS is among the oldest and most prestigious horticultural organizations in the United States. Our mission is to share the critical role of plants, gardens, and green spaces while helping to create healthy, livable communities and a sustainable planet.The AHS fulfills its mission through educational programming, The American Gardener magazine, Great American Gardeners Awards, Reciprocal Admissions Program, National Children & Youth Garden Symposium, Travel Study Program, and exemplary gardens at our national headquarters, River Farm. AHS work is national in scope.

American Conservation Experience (ACE) is a non-profit organization dedicated to providing rewarding environmental service opportunities that harness the idealism and energy of a volunteer labor force to help restore America’s public lands. ACE is grounded in the philosophy that cooperative labor on meaningful conservation projects fosters cross-cultural understanding and operates on the belief that challenging volunteer service unites people of all backgrounds in common cause.

We provide knowledge and inspiration, conservation and advocacy, and logistical support for the climbing community.

Our mission is to create the largest nature reserve in the contiguous United States, a refuge for people and wildlife preserved forever as part of America’s heritage.

The American River Parkway Foundation (APRF) leads and inspires the community to conserve and nurture the American River Parkway as a unique, accessible resource for everyone to enjoy.

The American Chestnut Foundation has one simple goal: to restore the American chestnut to its native forests. Destroyed by an imported blight many consider the worst environmental disaster of the twentieth century, the American chestnut was virtually eliminated from the eastern hardwood forest between 1904 and 1940. With its loss, wildlife populations plummeted; never to return to former levels. With recent developments in genetics, there is promise that this critically important wildlife food source and timber tree will again become part of our natural heritage. To make this possibility a reality, a group of prominent scientists, in 1983, established the non-profit research-oriented American Chestnut Foundation (TACF). The Foundation's mission is simple: to restore the American chestnut as an integral part of the eastern forest ecosystem. TACF is employing traditional plant breeding techniques, backed by advanced research methods, to develop a blight resistant American chestnut tree. TACF is restoring a species - and in the process, creating a template for restoration of other tree and plant species.

PARC remains vigilant to any efforts to re-start the Auburn Dam project, and is a member of the American River Coalition. Together we collaborate to educate elected officials, agencies and the public to the benefits of protecting the natural, scenic and recreational resources of the American River watershed.

To foster the creation, development, and expansion of community gardens throughout the US and Canada in order to improve people's quality of life through well-developed methods of social interaction, self-reliance, and healthy eating habits while at the same time reducing people's food budgets and neighborhood blight, and, finally, assisting community and economic development efforts by beautifying neighborhoods, producing nutritious food, conserving resources and creating opportunities for recreation, exercise, therapy and education.