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.
6hrs 6 Hours • Start: 08:00:00 • Fee: $90.00
6hrs Club Member 6 Hours • Start: 08:00:00 • Fee: $80.00
6hrs Relay Club Member 6 Hours • Start: 08:00:00 • Fee: $65.00
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.
Races Offered
6hrs
Jul 19, 2026
straighten
Distance —
6 Hours
terrain
Type —
Running
timer
08:00
sell
$90.00
6hrs Club Member
Jul 19, 2026
straighten
Distance —
6 Hours
terrain
Type —
Running
timer
08:00
sell
$80.00
6hrs Relay
Jul 19, 2026
straighten
Distance —
6 Hours
terrain
Type —
Running
timer
08:00
sell
$75.00
6hrs Relay Club Member
Jul 19, 2026
straighten
Distance —
6 Hours
terrain
Type —
Running
timer
08:00
sell
$65.00
Weather History
These values represent the 3-year monthly averages for July in Annapolis.
thermostatTemperature
21.9° / 30.5°
wb_sunnyFeels like
24.2° / 32.9°
light_mode
Avg sunshine hours
12h 0m
water_drop
Avg rainfall
5.5 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
8.5 km/h (Light breeze)
opacity
Sweat loss rate
Very high
terrain
Course conditions
Hard and dry surface
sunny
Max UV Index
Very High (8.0)
humidity_mid
Humidity
78.0%
wb_twilight
Sunrise
05:54
nightlight
Sunset
20:28
About Annapolis
Learn more about the host city, Annapolis.
Annapolis is the capital city of the U.S. state of Maryland. Annapolis was a thriving, wealthy town in the 1600s and 1700s. Many of the houses and other buildings from the 1800s remain, leaving a thriving, vibrant historic district with shops and restaurants along the waterfront. Brick-lined streets and quaint shops add to the feel. You could easily spend a day walking around the town's downtown harbor area shopping and eating. There is also a lively nighttime scene.
