Terri Dietz

Terri Dietz and Jerelyn Watanabe pioneered the 38.6 km Molokini Kealaikahiki Channel in Hawaii in 19 hours 35 minutes from Molokini to Lānaʻi and David Bell and David Hsu concurrently swam as a relay duo with escort pilot Mike Spalding

Terri Dietz and Michael Moreau after a 45 km crossing of the Molokai Channel in Hawaii

Terri Dietz and Haley Chasin before a 45 km crossing of the Molokai Channel in Hawaii

Terri Dietz is a 54-year-old American escort crew member and an open water swimmer from Hawaii and member of the Half Century Club.

Open Water Swimming Highlights

• On 8 October 2026, she completed history's third successful Maui Nui Swim between the islands of Lana'i, Maui, and Moloka'i in 25 hours 26 minutes.
• She completed all 13 legs of the Summer Solstice Swim held in Ala Moana Beach on Oahu in Hawaii, organized by the Ala Moana Beach Swim Club on 20 June 2026. The 13-hour swimmers included Melissa Harnsberber, Ellis Garcia, John Storm, Cindy Hughes, John Hughes, Thomas Rathbun, Stefan Reinke, Knoll Kaneshiro, Heather Iwasaki, Rachel Randall, Terri Dietz, Alex Webb, Deb Merwick, Chris Chuck, Eric Hu, Ryan Leong, and Kelly Quinn.
• She served as a feeder for Marcia Cleveland of the USA on 30 March 2022 across the 45 km Molokai Channel from Molokai to Oahu with escort boat pilot Michael Twigg-Smith.
• She served as a feeder for Alessandra Cima of Brazil on 14 August 2023 across the 45 km Molokai Channel from Molokai to Oahu with escort boat pilot Michael Twigg-Smith.
• She served as a feeder for Ryan Utsumi of the USA on 31 August 31 2024 across the 45 km Molokai Channel from Molokai to Oahu with escort boat pilot Ivan Shigaki.
• She served as a feeder for Bengisu Avci of Turkey on 19 October 2024 across the 45 km Molokai Channel from Molokai to Oahu with escort boat pilot Michael Twigg-Smith.
• She served as a feeder for Haley Chasin of the USA on 10 June 2025 across the 45 km Molokai Channel from Molokai to Oahu with escort boat pilot Michael Twigg-Smith.
• She served as a feeder for Sayani Das of India on 29 April 2022 across the 45 km Molokai Channel from Molokai to Oahu with escort boat pilot Michael Twigg-Smith.
• On 10 August 2025, she completed the 45.9 km 20 Bridges Around Manhattan New York city in 9 hours 6 minutes 51 seconds.
• On 24 April 2024, she completed a 15.2 km crossing of the Saguaro Lake in the SCAR Swim Challenge in Arizona in 5 hours 5 minutes 2.9 seconds.
• On 25 April 2024, she did not complete a 14.4 km crossing of the Canyon Lake in the SCAR Swim Challenge in Arizona.
• On 26 April 2024, she did not complete a 27.3 km crossing of the Apache Lake in the SCAR Swim Challenge in Arizona.
• On 27 April 2024, she completed a 10 km crossing of the Roosevelt Lake in the SCAR Swim Challenge in Arizona in 3 hours 38 minutes 10.3 seconds.
• She serves as a member and observer and feeder of the Kaiwi Channel Association.
• She competes in a duo relay at the 2025 58 km END-WET (Extreme North Dakota Watersports Endurance Test) from North Dakota to Minnesota at the age of 54, together with Jerelyn Watanabe, in June 2025.
• On 7 January 2024, she pioneered the first 24-mile crossing of the Molokini Kealaikahiki Channel from Molokai to Lanai in Hawaii in a tandem swim with Jerelyn Watanabe in 19 hours 35 minutes 50 seconds at the age of 53.
• On 31 March 2023, she served as a feeder for Srikaanth Viswanathan's attempt of a 42 km crossing of the Molokai Channel from Molokai to Oahu under the escort of Michael Twigg-Smith.
• On 15 September 2022, she completed a 42 km crossing of the Molokai Channel in 20 hours 20 minutes at the age of 51.
• In 2021, she completed a 13.7 km crossing of the Pailolo Channel from Molokai Island to Maui at the age of 50.
• In 2020, she completed a 14.2 km crossing of the Maui Channel from Maui to Lanai at the age of 49.
• She served as an escort kayaker for Michael Moreau on his handcuffed swim of 21.54 km on 27 May 2025 in Ala Moana Beach Park on Oahu in Hawaii with kayaker Jonathan Storm and Rachael Dobosz, Jaclyn Skeweris, Jaime Ubongen, Jerelyn Watanabe, and Jill Utsumi served as observers.

External links

• Terri Dietz Joins Pantheon of Maui Nui Swimmers
• @terri_dietz
• Swimmers Spend All Day In Ala Moana During Oahu’s Summer Solstice Swim
• Summer Soltice Swim Invites Swimmers to a Unique 13-hour Event on Oahu
• The Island of Mr. Moreau Is Now Manhattan
• Seth Baetzold Defends His END-WET Title
• Seth Baetzold Looks To Defend His END-WET Title
• Haley Chasin Sets Molokai Channel Women's Record
• Michael Moreau's Record-setting Handcuff Swim in Hawaii
• Shocking Start, Tough Middle, Great Outcome for Tsanko Tsankov
• Nikko Price, Lorelei Schmidt Win SCAR after 4 Days in the Arizona Desert
• Lights Out on the Final Day of the 2024 SCAR Swim
• SCAR Day Three - Swimming Into the Belly of the Beast
• How Do You Describe SCAR?
• Jamie Tout Continues a Long, Prolific Career at SCAR 2024
• SCAR Day Two Across Canyon Lake - From Tranquil to Tough
• How He Does It - Kent Nicholas Daisy Chaining at the SCAR Swim
• Price Is Right – And So Was Day One of SCAR, a 4-Day Adventure in Arizona
• The History of Swimming 4 Long Days In SCAR
• 59 Swimmers in Taper Mode in Build Up to SCAR, a 4-Day Adventure in Arizona
• 59 Swimmers to Compete in SCAR: A 4-Day Adventure in Saguaro, Canyon, Apache, Roosevelt
• SCAR Swim
• Terri Dietz, Jerelyn Watanabe Pioneer the Molokini Kealaikahiki Channel in Hawaii
• Staying Steady - Kaiwi Channel Association Under New Ownership
• Marathon Swimmers Federation bio