[6] According to its 2020 annual report, the foundation awarded just over $80 million in grants to the Sierra Club and to non-profits "to support scientific, educational, literary, organizing, advocacy, and legal programs that further our goals".

[8] In 2014, the Sierra Club Foundation announced it would be joining the Divest-Invest philanthropic campaign to more fully align its investment strategy with its mission.

[7] When Edna Bloss Thorne, a resident of Woodside, California, passed away in June 1970, she willed her summer home and its adjoining 86 acres to the foundation, stipulating the land be maintained as a nature preserve.

The district assumed the responsibility of paying the $16,600 of unpaid taxes and maintenance costs, and it formed the Thornewood Open Space Preserve.

After his case was dismissed, the Sierra Club Foundation sued Graham for malicious prosecution, winning a $2.4 million judgment in 1994 that was upheld on appeal in 1999.