Barbara Hillarythe first black woman to reach the North and South poles, died on Saturday. She was 88.

Her death was announced on her website and Twitter account.

“She died in the season of 24 hour sun in the South Pole,” the announcement said. Hillary, a cancer survivor and world explorer, had “suffered significant health decline in recent months,” according to a tweet.

Barbara Hillary@northsouthpole
She died in the season of 24 hour sun in the South Pole. https://twitter.com/northsouthpole/status/1198303652211052547 
Barbara Hillary@northsouthpole

Dear friends, Barbara Hillary has died. She was 88 and had suffered significant health decline in recent months. She lives on in history, in the hearts of those who loved her, and in the inspiration she gave to so many. @northsouthpole #NorthPole #SouthPole #Mongolia #Explorer

At age 75, the trailblazer became the first African American woman to make it to the North Pole. She reached the South Pole four years later, when she was 79.

Born in New York City and raised in Harlem, Hillary was a retired nurse and editor-in-chief of a nonprofit, multiracial magazine in Queens.

After surviving breast cancer in her 20s and lung cancer when she was 67, Hillary decided to start traveling. After realizing that no black woman ever reached the North Pole, she aimed to be the first one.

An avid community activist, she made history books once again in 2011 when she became the first African American woman to stand on the South Pole.