IRONMAN 70.3 Tallinn
Tallinn, Estonia · August · IRONMAN 70.3
Why people love it
- Flat, fast bike on closed roads
- Very strong finish area at Unibet Arena
- Cool August racing with a wetsuit-friendly lake
- Hotels easy to book and taxis cheap
Watch out for
- Strong crosswinds on the open bike course in 2025 and 2026
- Split transitions rely on free shuttles
- Storms, fog and rain in recent years
- Swim venue moved to Lake Raku in 2026, with a 150 m (490 ft) wade in 2025
- Small airport reportedly lost bikes and bags in 2026
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 27% of the overall score.
- Racer satisfactionLoved4.1
Athletes call the finish the best they have experienced and praise the vibe, but split transitions and storm days drew complaints. · Medium confidence
- OrganizationWell run4.1
Athletes praise organisation, aid and the finish area; split transitions bridged by shuttles and a 30-minute fog delay in 2026 were the issues. · Medium confidence
- First timer friendlyFriendly3.6
A flat, closed-road course helps, but split transitions, a rolling start and strong crosswinds in 2025 and 2026 add difficulty. · Low confidence
Course traits, not part of the score
- PR potentialFast4.2
Winners went 3:36:09 in 2024 and 3:40:06 in 2025 on a flat course, though crosswinds and a slower 2026 bike route hurt. · Medium confidence
- Course easeModerate4.0
Flat bike and run, but storms, crosswinds and cool, wet days have made races harder. · Medium confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.
- Wetsuit legalAlmost always4.5
Average water is 18 to 19 °C (64 to 66 °F), with wetsuits optional. · Medium confidence
- Water temperatureComfortable3.7
About 18 to 19 °C (64 to 66 °F), cool but comfortable in a wetsuit. · Medium confidence
- Calm waterSome chop3.1
The 2025 Sunday swim was choppy, and the 2026 swim ran in storm conditions. · Low confidence
- Swim easeEasy3.7
Rolling start in groups of four, but a 150 m (490 ft) wade to the pontoon in 2025. · Low confidence
- Swim experienceGreat3.7
Clear lake with a sandy bed, though the venue changed in 2026 and few athletes describe it. · Low confidence
Bike
Road surface, closures, scenery and wind. Counts for 19% of the overall score.
- Road surfaceGood4.2
Athletes call the closed roads good. · Medium confidence
- Road closuresFully closed4.5
Athletes describe closed roads. · Medium confidence
- Bike sceneryPleasant2.8
Open fields south of the city, with little scenic praise. · Low confidence
- WindWindy2.3
Open fields and strong crosswinds in 2025 and 2026, with gusts over 60 km (37.3 mi)/h (37 mph) in the 2026 storm. · Medium confidence
Course traits, not part of the score
- Bike speedFast4.3
Flat, fast, closed roads; the 2025 winner rode 2:00:54, though crosswinds and a new 2026 route cost time. · Medium confidence
- Bike flatnessPancake flat4.5
Described as flat, but no elevation gain figure is published. · Low confidence
- Bike simplicityMostly simple4.0
A flat, two-loop route with nothing technical reported. · Low confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportStrong3.6
A standout finish area, but few comments on crowds along the course. · Low confidence
- Aid stationsGood4.0
Aid was described as well stocked. · Medium confidence
- Run sceneryBeautiful3.5
Views of Tallinn Bay on a flat two-lap route. · Low confidence
- Run conditionsEasy3.7
Flat road run, though rain and a cold day made 2025 and 2026 tougher. · Low confidence
Course traits, not part of the score
- Run flatnessMostly flat4.4
A flat two-lap run. · Medium confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.
- Air temperaturePleasant4.1
August highs of 19 to 23 °C (66 to 73 °F), though 2024 reached about 27 °C (80 °F). · Medium confidence
- Weather reliabilityUnsettled2.3
Storm warnings and fog in 2026, wet and cold in 2025 and heat in 2024. · Medium confidence
- Venue beautyLovely3.7
Tallinn Bay views and a finish at Unibet Arena; the swim and bike are less scenic. · Low confidence
- Spectator friendlySome viewpoints3.0
Split transitions and a bike out in the countryside limit viewing. · Low confidence
Course traits, not part of the score
- Low altitudeSea level5.0
Near sea level. · High confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.
- Hotel availabilityGood4.3
A 2026 athlete found hotels easy to book. · Low confidence
- Hotel valueGood3.8
Taxis are cheap, but no race-week hotel prices were found. · Low confidence
- WalkabilitySome driving2.7
Free shuttles link the centre, race hub and start. · Medium confidence
- Travel easeOne connection3.1
Tallinn Airport is small, and one 2026 athlete's bike and bags were lost. · Medium confidence
- LogisticsSome complexity2.6
Split transitions with shuttles, and about 100 m (330 ft) of extra running between them. · Medium confidence
- Town and foodGreat4.5
A well-known old town with plenty of dining options. · Medium confidence
Key facts
- Location
- Tallinn, Harju, Estonia
- Typical month
- August
- Latest or next date
- 8 August 2027
- Organiser
- IRONMAN 70.3
- Field size
- About 2,400 athletes
- Distances
- 1.9 km (1.2 mi) swim, 90 km (56 mi) bike, 21.1 km (13.1 mi) run
- Swim venue
- Lake Raku (2026; Lake Harku listed in 2024) (lake)
- Water temperature
- 18–19 °C (64–66 °F)
- Wetsuit
- Optional
- Swim start
- rolling (groups of four, about every 5 s in 2025)
- Swim laps
- 1
- Run laps
- 2
- Air temperature
- 12–21 °C (54–70 °F)
- Nearest airport
- Tallinn (TLL)
- Where to stay
- Tallinn city centre
- Booking
- Hotels readily available per a 2026 athlete; taxis and Bolt cheap.
What racers and reviewers say
- Owen.org (Serpentine blog)Raced 2025 · blog · Positive
First middle-distance report from the 2025 edition: a rolling start in groups of four every 5 s, a flat fast course on closed good roads, and split transitions bridged by free shuttles. Calls it brilliantly organised for age-groupers, with well-stocked aid and a standout finish area; downsides were a choppy Sunday swim, wet roads and a cold day.
“The best finish line experience I have ever had in a triathlon.”
- Slowtwitch forum: Ironman Tallinn - who did itRaced 2026 · forum · Positive
Two athletes (one 70.3, one full) say organisation and vibe were great and the flat bike has good surface. The 70.3 faced a severe storm with crosswinds over 60 km (37.3 mi)/h (37 mph); fog delayed the full swim by 30 minutes. Split transitions annoyed; hotels are easy, taxis cheap, but the small airport lost bikes and bags.
- ERR News: French triathlete wins Tallinn IronmanRaced 2026 · article · Mixed
Coverage of the 2026 full-distance race with a record 4,300 entrants across both days. Windy with a level 2 storm warning, fog delayed the first-ever Lake Raku swim and rain began on the second run lap. The winner said cooler weather helped but the run was the hardest part.
- ERR News: Victory favors Estonians (70.3 results)Raced 2025 · article · Positive
Results report for the 24 Aug 2025 70.3: Henry Raeppo won in 3:40:06 (swim 24:27, bike 2:00:54, run 1:11:51) and Kaidi Kivioja in 4:12:32. No conditions commentary, but split times confirm a quick course.
- Slowtwitch: Bitados and Pohle take 70.3 European crownsRaced 2024 · article · Mixed
Report on the 2024 European Championship: bike described as fast and flat, but unseasonably warm at about 27 C (80 F) with winds to 32 km (19.9 mi)/h (20 mph), and many athletes did not finish. Winners went 3:36:09 and 3:59:40.
Show 3 more
- RaceRavesRaced 2027 · aggregator · Mixed
Course page for the 2027 edition: single-loop Lake Raku swim (clear water, sandy bed, average depth 6.4 m (21 ft) / 21 ft), flat bike south of the city, two-lap flat run finishing at Unibet Arena. Lists average water 18 C (64 F), highs 21 C (70 F). No athlete ratings yet.
- Tri247 race guideRaced 2024 · aggregator · Positive
Course guide (read via search summary; page itself blocked) calls the course flat, fast and primed for a PB, and places the 2024 swim at Lake Harku rather than the later Raku venue.
- Siim Petersell (LinkedIn)Raced 2026 · blog · Mixed
Social-media reflection (year inferred as 2026, seen via search snippet only): finished 5:11:01 and says the new bike route was over 2 minutes slower at the same power, with both transitions adding about 100 m (330 ft) of running.
Sources
Pages we used for facts and ratings. See how we rate.
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