Connecticut · 100K · 50 Miler · 50K

Jack Bristol Lake Waramaug Ultra Races

Jack Bristol Lake Waramaug Ultra Races is a 100K, 50 Miler and 50K event held in Kent, Connecticut. Its next confirmed date is Sunday, April 25, 2027. About 85 runners take part across all distances.

Race day
April 25, 2027
Location
Kent, CT
Field size
~85 runners

Race details

Date
Sunday, April 25, 2027
Distances
100K, 50 Miler, 50K
Field size
About 85 runners
Registration
ultrasignup.com

Registration, course & weather

Start time
6:30 AM EDT
Course profile — 100K
Loop course; Road surface
Course profile — 50 Mile
Loop course; Road surface
Course profile — 50K
Loop course; Road surface

About the Jack Bristol Lake Waramaug Ultra Races

The Jack Bristol Lake Waramaug Ultra Races are described by the organizer as the oldest ultras in Connecticut and the oldest 100K in the United States, run as loops on rolling, mostly flat paved roads around Lake Waramaug. The 53rd edition is planned for April 25, 2027.

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Jack Bristol Lake Waramaug Ultra Races: common questions

When is the Jack Bristol Lake Waramaug Ultra Races?
The next confirmed date is Sunday, April 25, 2027.
Where is the Jack Bristol Lake Waramaug Ultra Races held?
In Kent, Connecticut.
What distances does the Jack Bristol Lake Waramaug Ultra Races offer?
100K, 50 Miler and 50K.
How many people run the Jack Bristol Lake Waramaug Ultra Races?
About 85 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
How do I register for the Jack Bristol Lake Waramaug Ultra Races?
Registration is handled by the organiser at ultrasignup.com. Entry fees, caps and deadlines are set there.
Is registration open for the Jack Bristol Lake Waramaug Ultra Races?
Registration status as last checked October 6, 2026: not announced.
What time does the Jack Bristol Lake Waramaug Ultra Races start?
6:30 AM EDT.