Austin (KXAN) — Hundreds of paddle boarders launched from the Mansfield Dam Monday morning, each stroke getting them closer to their destination 21 miles away and their goal of $1.4 million raised for families navigating a cancer diagnosis. The 15th annual Dam that Cancer fundraiser set off across Lake Austin early in the morning. More than 200 stand-up paddleboarders hit the water as the sun crept up over the Mansfield Dam. 15th annual Dam That Cancer fundraiser at Lake Austin Sept. 16, 2024 (KXAN Photo/Todd Bailey) 15th annual Dam That Cancer fundraiser at Lake Austin Sept. 16, 2024 (KXAN Photo/Todd Bailey) 15th annual Dam That Cancer fundraiser at Lake Austin Sept. 16, 2024 (KXAN Photo/Todd Bailey) 15th annual Dam That Cancer fundraiser at Lake Austin Sept. 16, 2024 (KXAN Photo/Todd Bailey) 15th annual Dam That Cancer fundraiser at Lake Austin Sept. 16, 2024 (KXAN Photo/Todd Bailey) 15th annual Dam That Cancer fundraiser at Lake Austin Sept. 16, 2024 (KXAN Photo/Todd Bailey) 15th annual Dam That Cancer fundraiser at Lake Austin Sept. 16, 2024 (KXAN Photo/Todd Bailey) Hundreds of standup paddleboarders set off on Lake Austin Monday morning. Each stroke on their 21-mile journey supporting families of cancer patients. The 10-hour paddle concludes at the Tom Miller Dam, the money raised by the watery trek will benefit the Flatwater Foundation. Flatwater provides therapy and mental health support to cancer patients and their families. The nonprofit said it has provided 68,000 therapy sessions to more than 400 unique recipients since it started in 2010. Jason Carrier has been participating in Dam That Cancer for ten years. He said he joined after the organization provided his family with therapy after one of his loved ones received their diagnosis. He said each year is a moment to come together as a community and support families going through similar health struggles. "A ripple goes out when there's a cancer diagnosis, and we are tasked with raising the funds to provide the mental health therapy. It's something that anybody can get behind," Carrier said.