 In 2014, Tayac marched with the Cowboy Indian Alliance to protest the proposed Keystone XL pipeline.In 2016, she participated in protests against the imprisonment of Leonard Peltier, a member of the American Indian Movement arrested in the Pine Ridge Reservation protests in the 1970s.In 2017, Tayac provided one of the opening remarks at the People's Climate March on President Trump's 100th day in office.