Green Lake Triathlon 2027
- Date
- Sunday, July 18, 2027
- Start time
- 7:30 AM start (Chicago)
- Location
- Green Lake, 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 |
|---|---|---|---|---|
| OLYMPIC INDIVIDUAL | Olympic TriathlonSwim 1,500 m · Bike 24 mi · Run 6.2 miOpen water swim | Jul 18, 20277:30 AM | $84$89 after Jan 1, 2027 | – |
| OLYMPIC RELAY | Olympic TriathlonSwim 1,500 m · Bike 24 mi · Run 6.2 miRelay or teamOpen water swim | Jul 18, 20277:30 AM | $170$185 after Dec 1, 2026 | – |
| SPRINT INDIVIDUAL | Sprint TriathlonSwim 400 m · Bike 15 mi · Run 3.1 miOpen water swim | Jul 18, 20277:30 AM | $74$79 after Jan 1, 2027 | – |
| SPRINT RELAY | Sprint TriathlonSwim 400 m · Bike 15 mi · Run 3.1 miRelay or teamOpen water swim | Jul 18, 20277:30 AM | $160$175 after Dec 1, 2026 | – |
| Wisconsin Triathlon Series | TriathlonOpen water swim | Jul 18, 20277:30 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.
The swim at Green Lake Triathlon
This is an open water swim at Green Lake.
From the organizer's own race information (source). Venues and rules can change from year to year; the race's current athlete guide decides.
Water temperature and wetsuits at Green Lake Triathlon
Around July 18, Green Lake typically runs about 79°F at the surface (74 to 81°F across 2011 to 2020). The water usually runs above 78°F at this date: wetsuits are allowed but make you ineligible for age-group awards.
A model estimate from the USGS lake temperature model (daily surface temperatures for US lakes), not a measurement. 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
- OLYMPIC INDIVIDUAL: $84 until Jan 1, then $89 until Feb 1, then $94 until Apr 1, then $99 until Jun 1, then $109 until Jul 17, then $119 until Jul 18.
- OLYMPIC RELAY: $170 until Dec 1, then $185 until Jan 1, then $195 until Feb 1, then $205 until Mar 1, then $215 until May 1, then $225 until Jul 17, then $240 until Jul 18.
- SPRINT INDIVIDUAL: $74 until Jan 1, then $79 until Feb 1, then $84 until Apr 1, then $89 until Jun 1, then $99 until Jul 17, then $109 until Jul 18.
- SPRINT RELAY: $160 until Dec 1, then $175 until Jan 1, then $185 until Feb 1, then $195 until Mar 1, then $205 until May 1, then $215 until Jul 17, then $230 until Jul 18.
Online registration closes Jul 18, 2027, unless the race fills first.
Light and altitude
Sunrise on race morning is at about 5:29 AM, and the OLYMPIC INDIVIDUAL starts at 7:30 AM. The start sits about 860 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
Deacon Mills Park, Green Lake, WI 54941
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 Green Lake Triathlon ranks
- No. 28 of 50 on Largest sprint triathlons in the US
- No. 28 of 50 on Cheapest olympic triathlons in the US
- No. 30 of 50 on Largest 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 (6 years)SPRINT INDIVIDUAL
SPRINT RELAY
Aggregated from official results (Race Day Events) for Green Lake Triathlon. Individual finisher names are not stored here.
How fast do you need to be at Green Lake Triathlon?
At the 2026 SPRINT INDIVIDUAL, the fastest tenth finished in 1:19:14 or better, the top quarter in 1:25:29, and half the field in 1:34:04; the last tenth came in after 2:02:47.
At the 2026 SPRINT RELAY, the fastest tenth finished in 1:22:18 or better, the top quarter in 1:23:50, and half the field in 1:27:53; the last tenth came in after 1:53:40.
| Age | Women | Men |
|---|---|---|
| Under 20 | n/a | 1:15:16 |
| 20-29 | 1:24:35 | 1:12:25 |
| 30-39 | 1:28:38 | 1:14:49 |
| 40-49 | 1:24:37 | 1:17:07 |
| 50-59 | 1:32:56 | 1:19:41 |
| 60-69 | 1:57:04 | 1:20:35 |
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 Green Lake Triathlon
At the 2026 SPRINT INDIVIDUAL, the bike decided the most: the middle of the field lost about 7:35 to the top quarter there, 56% of the gap across the three legs.
Compared with a typical sprint triathlon in Wisconsin, the median bike here was 2:16 faster and the run 2:28 faster.
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 8:51 | 9:57 | 11:28 | 13:14+ |
| T1 | 1:21 | 1:40 | 2:07 | 2:50+ |
| Bike | 43:17 | 46:48 | 51:38 | 58:51+ |
| T2 | 0:57 | 1:10 | 1:31 | 2:05+ |
| Run | 21:37 | 24:21 | 27:09 | 31:45+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Compared with a typical sprint triathlon in Wisconsin, the median swim here was 1:14 faster, the bike 1:34 faster and the run 4:02 faster (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 8:36 | 9:11 | 10:16 | 12:18+ |
| T1 | 0:38 | 0:46 | 0:51 | 1:03+ |
| Bike | 46:20 | 47:17 | 52:20 | 1:01:42+ |
| T2 | 0:29 | 0:33 | 0:42 | 0:53+ |
| Run | 23:28 | 23:54 | 25:35 | 27:11+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Finishers by year
Down 19 percent since 2021.
All events combined, from official results.
Green Lake Triathlon Sprint Triathlon year by year
From 2021 to 2026, the field went from 245 to 313 finishers, and the median time dropped from 1:46:50 to 1:34:04.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 313 (+21%) | 1:34:04 | under 1:19:14 | 1:04:27 |
| 2025 | 258 (-4%) | 1:50:38 | under 1:28:58 | 1:10:16 |
| 2024 | 268 (+6%) | 1:54:49 | under 1:31:47 | 1:13:46 |
| 2023 | 254 (+27%) | 1:48:17 | under 1:29:00 | 1:14:53 |
| 2022 | 200 (-18%) | 1:50:53 | under 1:29:22 | 1:17:45 |
| 2021 | 245 | 1:46:50 | under 1:25:50 | 49:33 |
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 1:25:29, against 1:29:49 in a typical Wisconsin sprint triathlon, so times here run 5 percent faster.
- Olympic Triathlon: Faster than most US olympic triathlons. The fastest quarter of the 2025 olympic triathlon field finished under 2:32:55, against 2:43:48 in a typical US olympic triathlon, so times here run 7 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 July 18 the day usually runs from 64°F at dawn to 80°F in the afternoon, with measurable rain on about 17% of days. Cold snaps dip to 57°F and hot years reach 88°F.
Based on 75 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
- Deacon Mills Park, Green Lake, WI 54941Map
- Course
- Road
- Start elevation
- About 860 feet
- Included with entry
- Official Green Lake Tri Participant Shirt
- Donations
- Accepted when you register
- Distances
- Sprint Triathlon, Olympic Triathlon, Triathlon
- Editions
- 2027 (Jul 18, 2027), 2026 (Jul 19, 2026), 2025 (Jul 20, 2025), 2024 (Jul 21, 2024), 2023 (Jul 16, 2023), 2022 (Jul 17, 2022)
Organize this race? Add details or a correction
Quick answers
- When is Green Lake Triathlon?
- Sunday, July 18, 2027, starting at 7:30 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 Jul 18, 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, Olympic Triathlon, Triathlon.
- How big is it, and how fast?
- In 2026, 313 athletes finished the SPRINT INDIVIDUAL; the median finish was 1:34:04 and the winner finished in 1:04:27.
- Is it a fast course?
- The fastest quarter of the 2026 sprint triathlon field finished under 1:25:29, against 1:29:49 in a typical Wisconsin sprint triathlon, so times here run 5 percent faster.
- Where does it start?
- Deacon Mills Park, Green Lake, WI 54941.
From the organizers
Green Lake Triathlon