Jeff Miller - 15 miles off St John, U.S. Virgin Islands. Photo by Lee Richter.
- Jan 5-9: Global Marathon Swimming Awards winners announced.
- Jan 2: New Documented Swim: Triskelion Relay - Isle of Man to Ireland.
- Dec 26: U.S. Marathon Swim calendar updated for 2018.
- Dec 17: New Documented Swim: Sarah Thomas - Grand Lake, Oklahoma.
- Dec 12: New Documented Swim: Sarah Thomas - Lake Champlain.
- Dec 8: Recognized World Solo Distance Records list published.
- Dec 6: New Documented Swim: Brian Lanahan - Around James Island, South Carolina.
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