Race Intelligence · Vieux-Boucau-les-Bains, France
Vieux-Boucau's 2027 race is a 100 distance: 2 km swimming, 80 km through the Landes and 18 km running by the lake. The course map is still to come.
Lac Marin de Port d’Albret, Vieux Boucau, at dusk.
Your day in Vieux Boucau
I’m Tom, the coach behind Sense Endurance Coaching. Tell me where you are now and I’ll show you what a strong day in Vieux Boucau could look like.
The course behind your race
In 2027 the middle distance gives way to a 2/80/18 km race. The Landes roads are fast and open, so it is your job to keep the bike effort sensible. The run by the lake will tell you whether you did.
Vieux-Boucau swim · 2 km
The 2027 swim is 2 km. If it stays in the marine lake, conditions may be calm, but check the final layout and any exit before choosing your effort.
Settle without assuming calm water. Check the 2027 swim layout.
Vieux-Boucau bike · opening 25 km
Open Landes roads make speed feel free early on. Settle your effort, start drinking and hold a predictable line, since roads were open to traffic in 2026.
Start drinking early. Check effort before average speed.
Vieux-Boucau bike · middle 35 km
Through the exposed middle of the ride, let a headwind slow you rather than digging a hole, and bank nothing on a tailwind.
Ride by power or perceived effort. Bank nothing on a tailwind stretch. Do not repay a headwind by digging a hole.
Vieux-Boucau bike · final 20 km
Finish the ride at an effort that lets you run straight away. Empty the bottles you planned and let cadence rise before T2.
Finish the bottle you planned. Let cadence rise before T2.
Vieux-Boucau run · first 6 km
Start the 18 km at a controlled effort and use the early aid to check your fuelling plan before the lakeside pace tempts you.
Shorten your stride out of T2. Use the early aid deliberately.
Vieux-Boucau run · middle 6 km
Use familiar lakeside and town landmarks to check posture and fuelling rather than chasing a faster split.
Assign a check to each landmark. Keep taking aid even when you feel fine.
Vieux-Boucau run · final 6 km
Only in the final 6 km should you decide whether the day lets you race. If it does, change one thing at a time: cadence, posture, then pace.
Look for a strong 12th kilometre before committing. Keep the finish decision yours, not the crowd's.
Train for the 2/80/18 km format. Before race week, check the 2027 swim layout and wetsuit ruling, bike roads, aid and traffic rules, and run laps from the published course, and look at the wind forecast.
A race-day forecast is not meaningful yet; check back closer to the event.
Historical baseline, 2019–2025 · Open-Meteo historical archive · Updated 2026-10-25.Historical comparison only. This is not a forecast for 2027.
Make your finish prediction and I can send this plan to you in race week.
Prepare for Vieux Boucau
A finish range gives you something to work towards. The preparation is specific to this race: Practise holding bike effort when coastal wind changes speed at 100-distance intensity, then finding a repeatable 18 km run pace.
I’m Tom. With Sense Endurance Coaching, I’ll build that preparation around your life, follow how you respond and adjust the work as you get closer to Vieux Boucau.
Explore coachingTraining on your own? See half distance plans
Method
