In the late 1870s, Park became interested in the suffrage movement and attended conventions in Providence, Rhode Island in 1877 and 1879.

[5] She framed two pieces of California state legislation: the 1909 California Bird and Arbor Day Act legislated the protection of trees and birds and established a day for school children to be instructed in these environmental issues; and the bill which ensured equal guardianship of minor children to both parents.

To them a great deal of credit is due for getting the votes for women in California, in giving publicity to the cause.

If they did not destroy property and do things out of the ordinary, no one would pay any attention to them, and their action would be a pure loss.

In her homes (at 611 Gilman and 510 Hamilton streets in Palo Alto) she held meetings for a pacifist group called the American Union Against Militarism.

She won the praise of the organization's founder Henry S. Salt for printing a card, in 1920, that stated: "Be Kind to Animals, For You Are One Yourself.