Endless Summer 6-Hour Run

The Endless Summer 6-Hour Run returns to Quiet Waters Park in Annapolis, Maryland on July 19th, offering runners the chance to participate in this endurance event for a cause that matters locally. This year marks the 15th edition of the race, which benefits the Semper Fi Fund, a non-profit organization dedicated to helping wounded and injured Marines and their families.
Quiet Waters Park is set along Quiet Waters Park Road, providing a scenic backdrop with plenty of shade for runners during the event's hot July weather. The park features multiple pavilions including the Red Maple Pavilion where participants will gather before setting off on the course at 8:00 AM sharp. Runners and spectators can expect temperatures ranging from around 21 to 30 degrees Celsius, with an average of 78% humidity adding some challenge to this year’s run.
The Endless Summer 6-Hour Run has a rich history in Annapolis, supporting the Semper Fi Fund since its inception. Over the years, it has drawn hundreds of participants who contribute both by running and through additional donations at registration checkout via Ultra Signup. This event is not just about athletic achievement but also about community support for those who have served our country.
The course loops around Quiet Waters Park with a distance of approximately 4.25 miles per lap, offering numerous opportunities to rest under the shade during breaks or while refueling at aid stations strategically placed along the route. The start and finish lines are located at the Red Maple Pavilion, making it easy for runners to orient themselves as they loop through familiar landmarks in the park.
Weather conditions on race day will feature an average temperature around 26 degrees Celsius with a UV index reaching very high levels of eight. Runners should expect occasional light rainfall totaling about five millimeters and wind speeds averaging at eight kilometers per hour, which could affect visibility or hydration needs depending on individual pacing strategies during the six-hour window.

The Endless Summer 6-Hour Run offers four distance options: a standard entry for $90.00; club member rates starting at $80.00; relay teams can enter for $75.00 per team, with discounts available to club members at just $65.00.
Registration is conducted through the Ultra Signup platform accessible via https://ultrasignup.com/register.aspx?did=138630 where participants must pay attention to deadlines and fees associated with each distance choice. On race day itself, bib pickup occurs from 7:00 AM onwards at Quiet Waters Park in Annapolis.
Runners should head directly to the Red Maple Pavilion upon arrival for check-in procedures which include a mandatory water bottle or hydration pack due to limited cups available at aid stations throughout the course. The start line officially opens as soon as 8:00 AM when temperatures will already be rising towards midday highs expected in Annapolis during July.
The Endless Summer 6-Hour Run, held annually on July 19th in Annapolis, Maryland, continues to support important local causes through its participation fees and additional donations. This enduring tradition offers both a physical challenge for endurance athletes and an opportunity to contribute positively to the community's veteran families.