[5] Fox has been active in environmental preservation endeavors since helping to organize the first Earth Day on April 22, 1970 and speaks about ecospirituality.

Along with others, she founded and is the Executive Director of Circle Sanctuary, which is one of America's oldest Pagan centers and Wiccan churches.

Fox also is the founder of the Pagan Spirit Gathering, one of the oldest Nature Spirituality festivals in the United States.

Fox has advocated for Wiccan religious freedom for religious adherents in the military, including spearheading (along with Americans United for Separation of Church and State) the inclusion of the pentacle symbol on the US Department of Veterans Affairs list of emblems of belief that can be included on government-issued markers, headstones, and plaques honoring deceased veterans.

[12][13][14] She has also advocated for equal treatment of religion in the public square, including the inclusion of a pentacle in a holiday display at the Green Bay, Wisconsin City Hall[15] and in displays at the Wisconsin state Capitol for the annual Interfaith Awareness Week,[16] as well as addressing derogatory comments made by Delaware GOP Senate candidate Christine O'Donnell during her candidacy.