Jack Bristol Lake Waramaug Ultra Races

APR
25
2027
Experience the historic Jack Bristol Lake Waramaug Ultra Races in Connecticut, featuring scenic and flat paved loops around the lake for 50K, 50 mile, and 100K distances.
Sun 25 Apr 2027
100 kilometers 50 miles 50 kilometers

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Jack Bristol Lake Waramaug Ultra Races

The Jack Bristol Lake Waramaug Ultra Races take place in Kent, Connecticut, and represent a long-standing tradition in the ultra-running community. This event marks its 53rd anniversary in 2027 and is recognized as the oldest 100 km race in the United States and the oldest ultramarathon in Connecticut. The event is held on a course that primarily consists of paved roads encircling scenic Lake Waramaug.

The course features rolling loops that are described as predominantly flat. Participants begin with a 2.2-mile out-and-back section before continuing with laps around the lake. The start and finish area is located near the intersection of Lake Waramaug Road and Anderson Acres Road, within the vicinity of the state park.

Available distances include:

  • 100 km: Seven laps around the lake followed by a 2.3-mile out-and-back finish.
  • 50 Miles: Six laps around the lake finishing at the state park.
  • 50 km: Three laps of 7.6 miles each followed by a 1.9-mile out-and-back finish.

The event provides four well-stocked aid stations positioned at regular intervals around the lake, with distances between stations ranging from 1.7 to 2.2 miles. Participants have access to post-race food and drinks. Finishers of the 50 km and 50 mile races receive medals, while those completing the 100 km distance receive a belt buckle. Time limits are set at 12 hours for the 50 km and 13 hours for the 50 mile and 100 km events. Visit the organization's website for the most recent information.

100 km
100k
50 mi
50 Miler
50 km
50k
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