Lake Mills Triathlon 2027
- Date
- Sunday, June 6, 2027
- Start time
- 7:00 AM start (Chicago)
- Location
- Lake Mills, Wisconsin
- Entry fee
- From $74 · goes up to $79 on Jan 1, 2027
- Included with entry
- Includes a shirt
- Fundraising
- Takes optional donations when you register
Registration is open.
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Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| SPRINT INDIVIDUAL | Sprint TriathlonSwim 400 m · Bike 16 mi · Run 3.1 miOpen water swim | Jun 6, 20277:00 AM | $74$79 after Jan 1, 2027 | – |
| SPRINT RELAY | Sprint TriathlonSwim 400 m · Bike 16 mi · Run 3.1 miRelay or teamOpen water swim | Jun 6, 20277:00 AM | $160$175 after Dec 1, 2026 | – |
| Wisconsin Triathlon Series | Sprint TriathlonOpen water swim | Jun 6, 20277:00 AM | $339$369 after Dec 1, 2026 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Sprint Triathlon fee goes up to $79 on Jan 1, 2027.
Water temperature and wetsuits at Lake Mills Triathlon
Around June 6, the 1,369-acre lake nearest the race typically runs about 71°F at the surface (66 to 74°F across 2011 to 2020). Wetsuits were legal every year at this date.
A model estimate from the USGS lake temperature model (daily surface temperatures for US lakes), not a measurement; matched to the largest lake near the race's listed location, about 1.2 km away. Wetsuit cutoffs are USA Triathlon age-group rules. The race's own water temperature reading on race morning decides.
Race day planning
Entry fee schedule
- SPRINT INDIVIDUAL: $74 until Jan 1, then $79 until Feb 1, then $84 until Apr 1, then $89 until May 1, then $99 until Jun 5, then $109 until Jun 6.
- SPRINT RELAY: $160 until Dec 1, then $175 until Jan 1, then $185 until Feb 1, then $195 until Mar 1, then $205 until Jun 5, then $230 until Jun 6.
- Wisconsin Triathlon Series: $339 until Dec 1, then $369 until Feb 1, then $399 until Mar 1, then $429 until May 1, then $449 until Jun 6.
Online registration closes Jun 6, 2027, unless the race fills first.
Light and altitude
Sunrise on race morning is at about 5:17 AM, and the SPRINT INDIVIDUAL starts at 7:00 AM. The start sits about 820 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
Sandy Beach Park, Lake Mills, WI 53551
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Where Lake Mills Triathlon ranks
- No. 4 of 50 on Largest triathlons in the US
- No. 4 of 50 on Largest sprint triathlons in the US
National lists computed from results, entry fees, course maps and water temperatures; they refresh through the day.
2026 results
All results (5 years)SPRINT INDIVIDUAL
SPRINT RELAY
Aggregated from official results (Race Day Events) for Lake Mills Triathlon. Individual finisher names are not stored here.
How fast do you need to be at Lake Mills Triathlon?
At the 2026 SPRINT INDIVIDUAL, the fastest tenth finished in 1:16:57 or better, the top quarter in 1:25:51, and half the field in 1:36:27; the last tenth came in after 2:03:54.
At the 2026 SPRINT RELAY, the fastest tenth finished in 1:23:00 or better, the top quarter in 1:30:40, and half the field in 1:39:44; the last tenth came in after 1:56:49.
| Age | Women | Men |
|---|---|---|
| Under 20 | 1:33:58 | 1:20:27 |
| 20-29 | 1:20:26 | 1:07:31 |
| 30-39 | 1:13:26 | 1:04:03 |
| 40-49 | 1:22:00 | 1:07:16 |
| 50-59 | 1:23:35 | 1:16:31 |
| 60-69 | 1:34:56 | 1:20:22 |
| 70+ | n/a | 1:40:07 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
What would my time get me?
Where a finish time would have placed in 2026.
Swim, bike and run splits at Lake Mills Triathlon
At the 2026 SPRINT INDIVIDUAL, the bike decided the most: the middle of the field lost about 9:42 to the top quarter there, 56% of the gap across the three legs.
Compared with a typical sprint triathlon in Wisconsin, the median swim here was 0:39 faster, the bike 1:05 faster and the run 2:17 faster (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 8:22 | 9:23 | 10:51 | 12:34+ |
| T1 | 1:30 | 1:57 | 2:40 | 3:38+ |
| Bike | 42:52 | 47:15 | 52:49 | 58:55+ |
| T2 | 0:58 | 1:16 | 1:40 | 2:17+ |
| Run | 21:31 | 24:12 | 27:20 | 32:13+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
At the 2026 SPRINT RELAY, the bike decided the most: the middle of the field lost about 10:18 to the top quarter there, 58% of the gap across the three legs.
Compared with a typical sprint triathlon in Wisconsin, the median swim here was 0:36 faster, the bike 4:35 slower and the run 2:32 faster (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 8:03 | 8:37 | 10:54 | 11:27+ |
| T1 | 0:44 | 0:47 | 0:51 | 1:04+ |
| Bike | 47:08 | 53:01 | 58:29 | 1:06:13+ |
| T2 | 0:36 | 0:37 | 0:41 | 0:44+ |
| Run | 23:09 | 25:15 | 27:05 | 31:35+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Finishers by year
Up 42 percent since 2022.
All events combined, from official results.
Lake Mills Triathlon Sprint Triathlon year by year
From 2022 to 2026, the field went from 497 to 695 finishers, and the median time dropped from 1:38:33 to 1:36:27.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 695 (+8%) | 1:36:27 | under 1:16:57 | 58:59 |
| 2025 | 642 (+6%) | 1:38:46 | under 1:22:12 | 1:00:44 |
| 2024 | 605 (+9%) | 1:38:03 | under 1:18:32 | 59:32 |
| 2023 | 555 (+12%) | 1:36:58 | under 1:17:40 | 1:00:27 |
| 2022 | 497 | 1:38:33 | under 1:17:50 | 1:00:17 |
From each year's official results for the Sprint Triathlon; virtual options are left out.
How fast is it?
Faster than most Wisconsin sprint triathlons
The fastest quarter of the 2026 sprint triathlon field finished under 1:25:51, against 1:29:49 in a typical Wisconsin sprint triathlon, so times here run 4 percent faster.
Compares the fastest quarter of each field, so walkers and first-timers do not skew it. It reflects the course and the field together: a flat course, cool weather, or a competitive crowd all make times faster.
Typical race-day weather
Around June 6 the day usually runs from 56°F at dawn to 76°F in the afternoon, with measurable rain on about 31% of days. Cold snaps dip to 50°F and hot years reach 84°F.
Based on 65 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
Race details
- Where
- Sandy Beach Park, Lake Mills, WI 53551Map
- Course
- Road
- Start elevation
- About 820 feet
- Included with entry
- Official Lake Mills Tri Participant Shirt
- Donations
- Accepted when you register
- Distances
- Sprint Triathlon
- Editions
- 2027 (Jun 6, 2027), 2026 (Jun 7, 2026), 2025 (Jun 1, 2025), 2024 (Jun 2, 2024), 2023 (Jun 4, 2023), 2022 (Jun 5, 2022)
Organize this race? Add details or a correction
Quick answers
- When is Lake Mills Triathlon?
- Sunday, June 6, 2027, starting at 7:00 AM.
- How much does it cost?
- Entry starts at $74 before processing fees, and rises to $79 on Jan 1, 2027.
- When does registration close?
- Online registration closes Jun 6, 2027, unless the race fills first.
- Do athletes get a shirt or medal?
- Entry includes a shirt, according to the race's registration page. Check it for sizes and whether kids' races get the same.
- Can I donate to a cause when I register?
- Yes. The registration form offers an optional donation, usually for the charity or nonprofit the race supports. The race's own page names the cause.
- What distances are offered?
- Sprint Triathlon.
- How big is it, and how fast?
- In 2026, 695 athletes finished the SPRINT INDIVIDUAL; the median finish was 1:36:27 and the winner finished in 58:59.
- Is it a fast course?
- The fastest quarter of the 2026 sprint triathlon field finished under 1:25:51, against 1:29:49 in a typical Wisconsin sprint triathlon, so times here run 4 percent faster.
- Where does it start?
- Sandy Beach Park, Lake Mills, WI 53551.
From the organizers
Lake Mills Triathlon