Lake Dunmore Triathlon.
The Lake Dunmore Triathlon is the longest distance of the Vermont Sun series: 1500 metres in two laps of Lake Dunmore, 28 miles on two bike loops around the lake and Fern Lake, and 10 km on VT 53. On the last Sunday in August it closes the season at Branbury State Park.
Lake Dunmore Triathlon 2027: Course, Elevation & Route Profile
The swim is two laps of clear, usually calm Lake Dunmore, never more than 70 metres from shore, and the organiser allows wetsuits at all times. Two identical bike laps follow, each with the rolling lakeshore, the drop to Leicester, flat US 7 and the short climb back to VT 53, about 420 metres of climbing in all.
The run is an out-and-back on VT 53 to Fern Lake, with two short climbs on the way out and aid roughly every 1.5 miles. The cut-off is four hours from the wave start, and the organiser points anyone who cannot make it to the half-length Vermont Sun Triathlon held the same day.
The series has run since 1986, reaching its 42nd year in 2027 under race director Steve Hare. The race is USAT-sanctioned and capped at 400. Sprinters start half an hour later on the same day, so the state-park beach is busy.
+419 m
+80 m
Bike course
45.06 km · +419 m| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 17.4 | 1 km | 5.6 % | 7.2 % | +56 m | — |
| km 39.1 | 1 km | 5.6 % | 7.2 % | +56 m | — |
Climb categories follow the road-cycling convention and rate the terrain itself (length and gradient) regardless of sport: Cat. 4 marks the easiest rated climbs, Cat. 1 the hardest, and HC (hors catégorie, “beyond categorization”) is reserved for the most brutal ascents. Short climbs below the Cat. 4 threshold stay unrated.
Run course
10 km · +80 m| Start | Length | Ø | Max. | Gain | Cat. |
|---|
Climb categories follow the road-cycling convention and rate the terrain itself (length and gradient) regardless of sport: Cat. 4 marks the easiest rated climbs, Cat. 1 the hardest, and HC (hors catégorie, “beyond categorization”) is reserved for the most brutal ascents. Short climbs below the Cat. 4 threshold stay unrated.
How to pace Lake Dunmore Triathlon.
Settle into the race
At Olympic distance the bike decides the run. Swim the two laps evenly, ride the first bike lap deliberately below feel and fuel on the descents to Leicester so the second lap does not slow down.
Spread the effort
The classic trap is the sprinters who appear during your second bike lap and on the run: their pace is built for half the distance.
Finish strong
The second climb at around 39 km on the bike and run kilometres five to eight are where you find out whether your pacing was right.
Training plan for Lake Dunmore Triathlon: 12-week build
Build all three disciplines
Age-group athletes take about 2:30 to 3:45, a long, mostly aerobic effort with threshold portions and recurring short spikes on the climbs.
Brick sessions
The second bike lap and the second half of the run decide the race. Train long bricks of 60 to 90 minutes on rolling roads and 30 to 45 minutes of running, making sure the second half of each holds up.
Practise transitions
Late August can still be hot in Vermont. Get used to training in the warmth, test your fuelling for close to three hours, and plan with the four-hour cut-off in mind.
Arrive fresh
For the swim, sessions of 1500 to 2000 m with race-pace intervals, open-water practice and rehearsing the turn between two laps help.
Courses
Download each leg of Lake Dunmore Triathlon as its own GPX file for your watch or bike computer.
Let YOUB adapt your plan for Lake Dunmore Triathlon dynamically
Ben connects your goal, the course, current load, recovery, and calendar. Your plan stays pointed at race day even when real life is not perfectly plannable.
Everything about Lake Dunmore Triathlon.
How long is Lake Dunmore Triathlon?
Lake Dunmore Triathlon is 56.56 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
What is the profile of the bike course at Lake Dunmore Triathlon?
The bike course at Lake Dunmore Triathlon is classified as Rolling, averaging 9.5 vertical metres per kilometre. 38% of the route is flat, 30% climbs moderately (2 to 6%) and 0% is steeper than 6%.
What climbs does the bike course at Lake Dunmore Triathlon have?
The hardest climb on the bike course at Lake Dunmore Triathlon starts at kilometre 17.4, runs for 1 km at an average of 5.6% and gains 56 metres. 2 climbs are mapped in total.
Is there a GPX file for the Lake Dunmore Triathlon course?
Yes. Each leg of Lake Dunmore Triathlon is on this page as its own free GPX download — ready to import into Garmin, Wahoo, Komoot, Strava or any other app that reads GPX.
How should I prepare for Lake Dunmore Triathlon?
Preparation for Lake Dunmore Triathlon should account for 56.56 km, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
What pacing strategy works for Lake Dunmore Triathlon?
The pacing strategy for Lake Dunmore Triathlon should reflect 56.56 km and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
When does Lake Dunmore Triathlon take place?
Lake Dunmore Triathlon takes place on August 29, 2027.
Where does Lake Dunmore Triathlon take place?
Lake Dunmore Triathlon takes place in Salisbury, United States.
Which distances does Lake Dunmore Triathlon offer?
Lake Dunmore Triathlon offers 6 distances — Lake Dunmore Olympic Triathlon: 56.56 km; Lake Dunmore Olympic Triathlon Relay: 56.56 km; Lake Dunmore Olympic Aquabike: 46.56 km; Vermont Sun Sprint Triathlon: 28.08 km; Vermont Sun Sprint Triathlon Relay: 28.08 km; Vermont Sun Sprint Aquabike: 23.08 km.
How do I register for Lake Dunmore Triathlon?
Registration runs through the organiser: vermontsuntriathlonseries.com. YOUB shows you the course, elevation profile and training plan for your preparation.
