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"Cancer would never, could never actually beat me."
In 2017, ultra-marathon swimmer and world record holder Sarah Thomas was diagnosed with an aggressive form of breast cancer at just 35 years old. While undergoing aggressive cancer treatment, including chemotherapy, surgery, and radiation therapy, Sarah never gave up on her dream of doing a swim that most people thought was impossible. One year after completing her cancer treatments, Sarah did just that - becoming the first person to complete a four-way crossing of the English Channel in 54 hours and 10 minutes. Follow and share Sarah's story as she takes on marathon swims and continues her mission to fight cancer with Swim Across America!

On October 7, 2023, Sarah became the first person to swim the length of Lake Mead, the largest man-made reservoir in the United States. Sarah completed a 47.5-mile swim of the entire length of Lake Mead from the Colorado River to the Hoover Dam. The swim took her 26 hours, 45 minutes and 45 seconds (26:45:45) to complete.

$8,431.90
$10,000.00
  •   Total Raised in 2023
      
    Progress: 0%
      Raised of   Goal
FOLLOW AND GET ALL SARAH THOMAS UPDATES

SARAH'S MARATHON SWIMS

  • CATALINA CHANNEL
    2010
    20 MILES

  • MANHATTAN ISLAND SWIM
    2011
    28.5 MILES

  • ENGLISH CHANNEL (SINGLE)
    2012
    21 MILES

  • DOUBLE LAKE TAHOE
    2013 (1st PERSON)
    42 MILES

  • DOUBLE LAKE MEMPHREMAGOG
    2013 (1st PERSON)
    50 MILES

  • LOCH NESS
    2015 (2nd AMERICAN)
    22 MILES

  • LAKE POWELL
    2016 (1st PERSON)
    80 MILES

  • LAKE CHAMPLAIN
    2017 (1st PERSON)
    104.6 MILES

  • ENGLISH CHANNEL (FOUR WAY)
    2019 (1st PERSON)
    84 MILES

  • MOLOKAI CHANNEL
    2021
    24 MILES

  • MONTEREY BAY
    2021
    25 MILES

  • DOUBLE NORTH CHANNEL
    2022 (1st PERSON)
    43 MILES

  • LAKE MEAD (LENGTH)
    2023 (1st PERSON)
    47.5 MILES

FEATURED VIDEOS

HOW CAN I SUPPORT SARAH THOMAS AND SWIM ACROSS AMERICA?

You can support Sarah and the fight against cancer by:

  • - Donating in support of Sarah's mission here. Funds raised by Sarah support clinical trials and cancer research through Swim Across America.
  • - Following and sharing Sarah's story on social media.

 

WHO IS SARAH THOMAS?

Sarah Thomas, 40, is an ultra-marathon swimmer who holds the current world record for the longest continuous (unassisted, non-wetsuit) swim done in current-neutral conditions. That record-breaking swim covered 104.6 miles over 67 hours and was completed in Lake Champlain (USA) in August of 2017. Shortly after completing this swim, Sarah was diagnosed with an aggressive form of breast cancer. She was just 35 years old. While undergoing aggressive cancer treatment, including chemotherapy, surgery, and radiation therapy, Sarah never gave up on her dream of doing a swim that most people thought was impossible. One year after completing her cancer treatments, Sarah did just that- becoming the first person to complete a four-way crossing of the English Channel in 54 hours and 10 minutes. Recently, Sarah became the first person in history to complete a two-way crossing of the North Channel, 21 hours and 46 minutes in freezing water, peppered with giant jellyfish.

Sarah lives near Denver, Colorado, with her husband Ryan, their two beagles and their rescue mutt. When she is not training or coaching open water swimmers, Sarah works as a full-time veterinarian recruiter. You can read her full story and full list of marathon swims at the Sarah Thomas Swims website.

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WHY IS SARAH PASSIONATE ABOUT SWIMMING TO FIGHT CANCER?

"I was diagnosed with stage two breast cancer in 2017 at the age of 35. It was a terrifying time and we didn't know how much my treatments would impact my ability to swim in the future. Being able to partner with Swim Across America combines two of my passions: Open water swimming and doing everything I can to fight cancer so that others won't have to go through what I went through. "

WHERE WILL THE MONEY RAISED GO?

The money raised by Sarah Thomas will fund a cancer research project guided by the Swim Across America Research and Grants Committee that will be granted in the name of her incredible challenges.

Click here to learn more about the innovative breakthrough research that Swim Across America funds.

WHAT IS THE LAKE MEAD SWIM IN SARAH'S OWN WORDS?

"After my first visit to the Hoover Dam in February 2021, I knew: I had to swim across Lake Mead. Water levels in Lake Mead are in danger of dropping so low that a swim may not always be possible across this beautiful and important body of water.

Lake Mead is the largest man-made reservoir in the United States, and to my knowledge, no one has swum a full length of the lake. I started the swim in South Cove, where my favorite river, The Colorado, enters the lake. I then followed the lake 50 miles until I ran out of water at the Hoover Dam. The swim took 24 hours and 45 minutes to complete.

The water was a balmy 78 on the surface and around 75 degrees in the swimming depth. I’m a cold water swimmer, so this was a bit warmer than I’m used to, but it ended up being lovely. I’m so excited to be able to accomplish swimming in Lake Mead, and as a breast cancer survivor, to do it during Breast Cancer Awareness Month, all while raising crucial funds for cancer research with Swim Across America."

WHAT HAS SARAH ENCOUNTERED IN HER MARATHON OPEN WATER SWIMS?

"I have never seen a shark, but when I swam the Molokai Channel, it was dark and scary- and I'm certain they were there! I have been stung by A LOT of jellyfish. In my double North Channel swim last summer, I was covered from head to toe with lions mane jellyfish stings that oozed and scabbed over after the swim. They were so huge I often couldn't see where the tentacles started and stopped! One of my most memorable encounters was in the Cook Strait (New Zealand), I was having a rough patch; the waters were really choppy and I'd swallowed a lot of sea water and my stomach hurt. It was my first big swim after finishing my cancer treatments (I was swimming 6 months after I'd had my last day of radiation). I was seriously contemplating quitting and doubting my ability to keep going. Then, out of nowhere, a giant pod of dolphins appeared. They swam all around me, jumping and playing for nearly 45 minutes. It was really incredible. My crew could see them jumping and playing, too. (No, I wasn't hallucinating! hahaha). That interaction really pulled me out of a rough patch and got me motivated to keep going."

DOES SARAH HAVE ANY OTHER FAVORITE SWIM MOMENTS?

In Lake Powell (80 miles, 2016, just up the river from Lake Mead). "The first night was this beautiful, crisp clear night. It was my first time to know I'd need to swim through TWO nights and I was dreading it. But the night was so beautiful and clear I could see shooting stars through my goggles. It didn't ease my mind, but gave me something to think about that was bigger than me and what I was doing."

HOW DO I GET A MATCHING GIFT?

Many employers sponsor matching gift programs and will match any charitable contributions or volunteer hours made by their employees. To find out if your company has a matching gift policy, please search for your employer in our matching gifts portal.

WHO DO WE CONTACT WITH MEDIA INQUIRIES?

In the U.S., please contact Jeni Howard at jhoward@jhowardpr.com for media inquiries.

  Sarah Thomas Photos