Lake Dunmore Triathlon

June 23 and August 18, 2024

.9 Mile Swim | 28 mile Bike | 6.2 mile Run
Lake Dunmore, Vermont

Nestled against the Green Mountains, just below Rattlesnake Point is Branbury State Park. The lake region is a most spectacular and pristine place to swim, bike and run. Novice and advanced athletes alike marvel the beauty of our courses and enjoy the mountains, lakes and streams of Central Vermont.

Race Details

Registration / Bib Pick Up:

June: Between 6:40-7:30 am at Branbury State Park on race morning.

August: Between 6:25-7:30 am at Branbury State Park on race morning.

Detailed pre-race announcements will be emailed prior to registered participants.  Final announcements at 7:45 am.

Race Time: Race Starts at 8:00 am.

Race Cut-off:  The official race cut-off is 4 hours from wave start time.  Participants won’t have access to course support.  If you don’t think you can compete in the Lake Dunmore Triathlon in 4 hours, please consider entering the Vermont Sun Triathlon which is a sprint and is only half as long.

Photos: Beautiful professional photos free to all racers. Each racer has as many as 10 professional photos’s done by Pat Hendrick Photography.

Visit: Pat Hendrick

Important age group information: The age group of a participant will be determined by age on Dec. 31 of the event year, not by age on race day. For example: If you turn 25 years old in November of 2024, you will race and be ranked in the 25-29 age group for the entire 2024 season.

If you have finished in the top 5 of one  of our races and would like to be seeded, please email us at

Triathlon Individual Age Groups: will be every 5 years: 10-14, 15-19, 20-24, 25-29, etc. for men and women.

Relay Teams: 2 to 3 person teams. Relay teams tag in the transition area.


Triathlon-Top 3 overall  male and female, top 3 five year age groups
AquaBike-Top 3 overall  male and female
Relay Teams– Top 3 overall

Amenities: Included in your entry fee is free Professional digital photos, free sports drinks, bagels, customized silicon swim cap, Specialized custom water bottle, custom awards to top 5 overall and top 3 in each age group, fully supported aid stations, sponsor samples, safe course, and post-race refreshments.

We are excited to offer Massage ($1 per minute), custom Vermont Sun tech shirts (only $15 if ordered with online registration),  beautiful custom finisher Medals ($9.00 must be ordered 1 month in advance during pre-registration)

Food and Refreshments: Free to athletes at all events.Branbury Admittance: Included in your entry fee. Spectators will be charged $3.00 for adults and $2.00 for children at the gate. The fee is good for the entire day so bring the family and enjoy the spectacular lake, beach, and mountain setting! Dogs are welcome, but must be on a leash and are not permitted on the beach.

Thank you for supporting Branbury State Park, without whom we would not have these great events.

Massage: Available at all events

Refund/Transfer Policy: Registrations may be transferred to another race or athlete within the current series for a fee of $20 and providing it is requested at least 1 week prior to race day. Absolutely no refunds or transfers into the 2025 season.

When weather conditions or other physical conditions present a danger to participants, Vermont Sun maintains the right to cancel the event.  Less threatening conditions may cause alterations of the course or the post-awards ceremony to ensure participant, volunteer, and community safety.  Such conditions fall under the label “Acts of God,” and will not result in refunding of any race entry fees or future event credits.



June 23rd race $125 until 12/31  $150 until 4/23  $170 until 6/17

August 13th race $125 until 12/31 $150 until 6/18  $170 until 8/12

Student Pricing (ages 17 & Under) $125 until online registration closes per event


June 23rd race $180 until 12/31  $205 until 4/23  $215 until 6/17

August 18th $180 until 12/31  $205 until 6/18  $215 until 8/12

Race day registration is available if space permits. All event race dates are limited to 400 participants. Race day registration is available if space permits for a fee of $30, and you MUST have a current USAT membership prior to race day.

Rules: All Vermont Sun Triathlons will be USAT sanctioned and run by their official rules.

For the most commonly violated rules click here. Wetsuits are permitted.

Sites to Visit:

Course Maps

Click on image for a larger view.

Course Elevations

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" Just a note of thanks for running some of the best, most organized events that I have participated in. Keep up the fine work! "
- Doug Dier, Brandon, VT