Great Chesapeake Bay 4.4 Mile Swim & 1 Mile Bay Challenge
About this race
This event benefits the March of Dimes, the Chesapeake Bay Trust, the US Coast guard, and other local charities.
The 2026 Great Chesapeake Bay Swim is doing a Sunrise Swim in 2026!
Race Day is June 14th, 2026, with a 6:30am start time for the 4.4 Mile Swim. We are currently planning on having the 1 Mile Swim begin at 7:30am.The 1 Mile Start time is subject to final approval.
Two emails have gone out. One to the 2025 4.4 Mile Swimmers with information about the Early Bird program (complete the 4.4 mile swim with us and receive a special offer for the following year).
The other email has gone out to our 2024 4.4 Mile Swimmers who were unable to join us in 2025.
If you fall in to either of these categories and didn't receive an email from us on Sept 30th, 2025, please reach out ASAP at info@bayswim.com
Don't forget, our newly designed site (www.BaySwim.com) and our email of info@bayswim.com are your sources for all of your up to date information!!!
CURRENT WATER TEMPERATURE READINGS https://www.ndbc.noaa.gov/station_page.php?station=44063
Don't forget to follow us on Facebook at https://www.facebook.com/greatchesapeakebayswim !!
Pick your distance
Swimming
Great Chesapeake 4.4 Mile Bay Swim
Great Chesapeake 1 Mile Bay Challenge
Race-day daylight
We have no recorded weather for Stevensville yet, but sunrise and sunset follow from the venue and the date.
The sun rises at 6:09 AM and sets at 9:22 PM local time (EDT) in Stevensville on June 13, 2027 — 15h 12m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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Results — Great Chesapeake Bay 4.4 Mile Swim & 1 Mile Bay Challenge
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 3 Stevensville events
Spotted something wrong? Tell us and we'll fix it.