Challenge Kaiserwinkl-Walchsee
Walchsee, Austria · June · Challenge Family
Why people love it
- Clear, drinking-quality alpine lake swim at about 18–22 °C (64–72 °F)
- Voted Best Bike Course in the 2021 Challenge Family Awards
- Four run laps around the lake with strong local support
- Alpine setting beneath the Kaiser mountains
Watch out for
- 1,048 m (3,438 ft) of bike climbing and descents near 70 km (43.5 mi)/h (43 mph)
- Heat of 30 °C (86 °F) or more in 2026 slowed many runners to a walk
- Drafting on the bike was criticised in 2026
- Sells out months ahead; 2027 is listed as a shorter format
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 satisfactionLoved4.4
Finishers in 2025 and 2026 praised the swim and bike, and it won Best Bike Course in 2021. Drafting and lost bags drew complaints. · Medium confidence
- OrganizationWell run3.9
Added an aid station and showers for the 2026 heat, but drafting, undelivered bags and a roadworks cut shortened the bike. · Medium confidence
- First timer friendlyDoable2.8
Rolling start and a calm lake help, but 1,048 m (3,438 ft) of climbing, technical descents and a hot run are demanding. · Medium confidence
Course traits, not part of the score
- PR potentialAverage2.6
Hilly bike and a rolling run. The 3:36:33 winning time in 2026 came on a bike cut to about 79 km (49 mi). · Medium confidence
- Course easeTough2.6
1,048 m (3,438 ft) of bike climbing, steep descents and recent heat near 30 °C (86 °F). · Medium confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.
- Wetsuit legalCoin flip3.0
Water is 18–22 °C (64–72 °F) and the 2026 swim was non-wetsuit. The rule varies by year. · Low confidence
- Water temperatureComfortable4.2
Lake water of 18–22 °C (64–72 °F) is comfortable. · Medium confidence
- Calm waterGlassy4.6
Lake with no chop reported in 2026. · Medium confidence
- Swim easeEasy4.4
Rolling start and a single lap in a clear lake. · Medium confidence
- Swim experienceSuperb4.6
A 2026 finisher called it the best water quality anywhere. Alpine lake setting. · Medium confidence
Bike
Road surface, closures, scenery and wind. Counts for 19% of the overall score.
- Road surfaceGood4.0
Alpine-region roads. No detailed surface reports. · Low confidence
- Road closuresMostly closed3.7
Roads are controlled, but drafting and roadworks detours were reported. · Low confidence
- Bike scenerySpectacular4.8
Tyrolean countryside under the Kaiser mountains. Won Best Bike Course in 2021. · Medium confidence
- WindMostly calm3.8
Sheltered valley. No wind reports. · Low confidence
Course traits, not part of the score
- Bike speedAverage2.7
1,048 m (3,438 ft) of climbing in 90 km (56 mi), though fast descents help. · Medium confidence
- Bike flatnessRolling2.5
1,048 m (3,438 ft) over 90 km (56 mi) is hilly; descriptions suggest it rides harder than the profile shows. · Medium confidence
- Bike simplicityTechnical2.4
Fast technical descents near 70 km (43.5 mi)/h (43 mph) and tight cornering. · Medium confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportStrong4.0
Children handed out drinks and spectators sprayed runners on the four-lap village run. · Medium confidence
- Aid stationsGood4.2
An extra aid station and showers were added for the heat. · Medium confidence
- Run scenerySpectacular4.5
Four laps around Lake Walchsee with an alpine backdrop. · Medium confidence
- Run conditionsModerate2.8
Heat, repeated climbs and walking were reported in 2026. · Medium confidence
Course traits, not part of the score
- Run flatnessRolling3.4
Official gain is 85 m (279 ft), but finishers describe three repeated climbs. · Medium confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.
- Air temperatureWarm or cool3.2
About 30 °C (86 °F) or more in 2026, and 2025 was hot on the run. · Medium confidence
- Weather reliabilityVariable3.0
Wet-weather shortening in 2017, heat in 2021 and 2026, roadworks in 2026. · Medium confidence
- Venue beautyStunning4.8
Alpine lake under the Kaiser mountains. A finisher called the venue spectacular. · Medium confidence
- Spectator friendlyEasy4.0
Multi-lap run and a compact village around the lake. · Low confidence
Course traits, not part of the score
- Low altitudeModerate3.3
About 658 m (2,159 ft), a modest altitude. · Low confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.
- Hotel availabilitySells out early2.4
The 2025 race sold out about seven months ahead, and the organiser urges early booking. · Medium confidence
- Hotel valueNormal3.4
Options range from campsites to five-star hotels. No price reports. · Low confidence
- WalkabilityWalkable4.0
Small village centred on the lake. · Low confidence
- Travel easeOne connection2.8
Fly to Salzburg, Munich or Innsbruck, then transfer by road. · Medium confidence
- LogisticsSimple3.6
Compact village, but bags went missing in 2026. · Medium confidence
- Town and foodFine3.4
Small Tyrolean village. · Low confidence
Key facts
- Location
- Walchsee, Tyrol, Austria
- Typical month
- June
- Latest or next date
- 27 June 2027
- Organiser
- Challenge Family
- Distances
- 1.9 km (1.2 mi) swim, 90 km (56 mi) bike, 21.1 km (13.1 mi) run
- Swim venue
- Lake Walchsee (lake)
- Water temperature
- 18–22 °C (64–72 °F)
- Wetsuit
- Non-wetsuit in 2026; varies with year
- Swim start
- rolling start
- Swim laps
- 1
- Bike climbing
- 1,048 m (3,440 ft)
- Bike laps
- 2
- Key climbs
- Steep climbs and a fast descent to Kossen reported around 70 km/h (43 mph)
- Run climbing
- 85 m (280 ft)
- Run laps
- 4
- Run shade
- partial
- Air temperature
- 20–30 °C (68–86 °F)
- Altitude
- 658 m (2,160 ft)
- Nearest airport
- Salzburg (SZG); Munich or Innsbruck also used
- Where to stay
- Walchsee village, Lakeside campsites and farmhouses
- Booking
- Organiser says book early as demand has been high; the 2025 middle distance sold out in early June, about seven months ahead (Slowtwitch).
What racers and reviewers say
- Slowtwitch forumRaced 2026 · forum · Mixed
Wetsuit-free swim in clear, calm water; bike was a highlight with a 70 km/h (43.5 mph) descent despite a chain drop and a roadworks shortening to about 79 km (49 mi). Heat of 30 C (86 F) or more wrecked the run; praised organisation but flagged drafting and undelivered bags.
“Swim is divine, best water quality anywhere.”
- Slowtwitch forumRaced 2025 · forum · Positive
Repeat racer: very fun bike, fast descents tempt overbiking, run harder than expected with three repeated hills, children handing out drinks give great atmosphere; early races had poor weather that cleared.
- Slowtwitch forumRaced 2025 · forum · Positive
2025 had perfect weather though hot on the run; recommends staying on for a holiday in the region.
- Tri247Raced 2026 · article · Mixed
2026 pro results headlined 'beat the heat'; men's bike shortened by roadworks to about 80 km (50 mi). Pro winners 3:36:33 and 4:08:47. Search snippet only; page returned 403.
- SlowtwitchRaced 2017 · article · Mixed
2017 race shortened to a 1.5 km (0.9 mi) swim and 68 km (42 mi) bike for wet weather and dangerous passages; the steep Rettenschoss descent was removed for safety.
Show 3 more
- Challenge Family race pageaggregator · Positive
Drinking-water-quality lake at about 22 C (72 F), two bike loops with 1,048 m (3,438 ft) gain, four run laps with 85 m (279 ft); book early as demand is high. Promotional.
- Tri247 heat previewarticle · Mixed
Preview noting organisers added aid stations and showers for high alpine temperatures. Page not retrievable; details from search snippet.
- Alpen-Guidearticle · Positive
German guide: 1.9 km (1.2 mi) lake swim at roughly 18-21 C (64-70 F), two bike loops with about 1,200 m (3,937 ft) of altitude difference, harder than the profile suggests. Page not fetched; snippet only.
Sources
Pages we used for facts and ratings. See how we rate.
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