To raise money and awareness in the fight against breast cancer, four women are rowing across the Pacific Ocean.

They left San Francisco on April 20 aboard a pink, 29-foot boat called Doris. They are scheduled to arrive in Cairns, Australia, in October, which is Breast Cancer Awareness month. Upon their arrival, they will have covered nearly 8,500 miles with no support.

Filmmaker Sarah Moshman is chronicling this adventure in her latest feature-length documentary. "Losing Sight of Shore" is scheduled for release next year. To follow the progress of the rowers, go to Here is a sneak peek at the film:

A total of six women will be involved with the rowing. Three are going the distance. Three others will each tackle one leg of the three-part journey. The crew had breaks in Hawaii and Samoa where one fresh rower rotated in. The age range of the six women is 24 to 40.

Related Story: 'Extinction Soup' Documentary Examines Impact Of Mass Shark Slaughter