Mark your calendars for April 25, 2027, as the Jack Bristol Lake Waramaug Ultra Races celebrate their 53rd anniversary. This historic race is not just another endurance challenge; it's an iconic tradition that has been running since 1974 and remains one of the oldest 100K races in the United States. The event offers three distances: a grueling 100 kilometers, a challenging 50-mile run, and a more manageable yet still formidable 50-kilometer race. All participants will start from near the intersection of Lake Waramaug Road and Anderson Acres Road in Kent, Connecticut, with staggered start times to accommodate each distance: 6:30 AM for the longer races and 7:30 AM for the 50K. The course itself is a scenic loop around picturesque Lake Waramaug. Paved roads make up most of the route, offering runners rolling terrain that's conducive to setting personal bests. Aid stations are strategically placed every few miles along the lakefront path, ensuring participants stay fueled and hydrated throughout their journey. The race finishes back at the State Park where it all began. In addition to the stunning natural surroundings, finishers will receive custom-designed swag: a hi-tech t-shirt for everyone who participates, medals for 50K and 50-mile runners, and an impressive belt buckle for those completing the full 100 kilometers. Post-race food and drinks are also provided at the State Park. Join fellow enthusiasts in this enduring celebration of endurance running amidst one of Connecticut's most beautiful settings.
Races Offered
100K
Apr 25, 2027
straighten
Distance —
100K
terrain
Type —
Running
timer
06:30
sell
$190.00
50 Miler
Apr 25, 2027
straighten
Distance —
80.5K
terrain
Type —
Running
timer
06:30
sell
$170.00
50K
Apr 25, 2027
straighten
Distance —
50K
terrain
Type —
Running
timer
07:30
sell
$150.00
Weather History
These values represent the 3-year monthly averages for April in Kent.
thermostatTemperature
3.9° / 14.2°
wb_sunnyFeels like
-0.6° / 10.2°
light_mode
Avg sunshine hours
8h 21m
water_drop
Avg rainfall
3.7 mm
ac_unit
Avg snowfall
0.1 cm
air
Avg wind speed
14.1 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (5.0)
humidity_mid
Humidity
67.5%
wb_twilight
Sunrise
06:12
nightlight
Sunset
19:34
About Kent
Learn more about the host city, Kent.
Kent is a town in Litchfield County, Connecticut, United States. Located alongside the border with New York, the town's population was 3,019 according to the 2020 census. The town is part of the Northwest Hills Planning Region. Kent is home to three boarding schools: Kent School, the Marvelwood School, and South Kent School. The Schaghticoke Indian Reservation is also located within town borders. The town was also home to former U.S. Secretary of State Henry Kissinger. The town is also the birthplace of Family Guy creator Seth MacFarlane.
