Race Week and Race Day at Tallinn 70.3: Timeline, Common Mistakes and Plan B

The days before: arrive early, stay flexible

Get into town at least two days early, ideally three. Not because of jet lag or the trip — Tallinn is an easy travel destination — but because this race has a history of last-minute changes. In 2024 the swim course was moved from Lake Raku to Stroomi Beach (sea) three days before the race due to algae, with a beach start and roughly 200 m of wading through shallow water. The organizers have also announced small course changes via social media channels in the past. Bottom line: follow the official channels every day of race week and don't build your race around a course that might change.

A typical race week timeline

• 2-3 days out: registration at the race center (shuttle available), race packet pickup, read the athlete guide. Check for updates on the swim course and water temperature.
• Day before: bike and bag check-in. Heads up: split transition, with T1 at the lake (Karuse/Sinirebase) and T2 in front of the Unibet Arena. Two drop-offs, two locations, cut-off times to respect. Walk through T2 and the finish area.
• Night before: lay out two clothing sets, one for heat and one for cool/windy conditions. Don't decide yet.
• Race morning: check the weather and water temperature, pick the right kit, take the shuttle to the lake with plenty of margin.

The wetsuit and water question

Average water temperature is 18 °C and wetsuits are generally expected and allowed. But sources report sharp swings: 19 °C three days before the race and 11 °C one morning. The official wetsuit call comes on race days. What to do: swim in your wetsuit in cool open water before you travel, and have a mental plan for a start in colder water than expected — a longer dry-land warm-up, controlled first strokes, no panic over that initial shortness of breath.

The weather: two possible races

Averages say 12-21 °C air temperature. Race history says otherwise: 32 °C in 2024, cold days on the bike in other editions, strong wind and lateral gusts. In Tallinn you don't prepare for one forecast, you prepare for two. The hot plan means ice and fluids at every run aid station starting from the first lap. The cold plan means a windproof layer for the bike and more conservative watts into the headwind.

The common mistakes

1. Fixating on the original swim course. It can change three days before the start. Prepare for the water, not the map. 2. Underestimating the split transition. Athletes who show up to check-in at the last minute with poorly packed bags start the race already short on mental clarity. 3. Going out too hard on the bike. Fast course, adrenaline, groups forming: that's how you pick up a 5-minute penalty or burn your legs for the run. 4. Ignoring the first run aid stations. If it's hot, thermal management starts at km 2, not km 15. 5. Deciding your kit the night before. Baltic weather changes its mind overnight. Decide in the morning.

Plan B, in writing

Before you leave, write out three scenarios: normal race, hot race (above 28 °C), cold/windy race. For each: clothing, bike power targets, run pace, aid station protocol. On race morning, pick the scenario and stop second-guessing it. The times in the level-based profiles — from 4:20 to 6:30 — are rough estimates: Tallinn weather can shift them by 15-20 minutes in either direction, and that applies to every competitor.

If you arrive in Tallinn with one plan, you're gambling. If you bring three, you're racing. And after the finish line in 2024, there were showers, a sauna and a meal waiting: a good reason to close it out strong, whatever scenario you drew.