Sprint Triathlon Duathlon

Tri-Shark Classic Triathlon & Duathlon 2027

Date: Saturday, June 5, 2027
Start time: 8:00 AM start (Chicago)
Location: Hudson, Illinois
Entry fee: From $79 · goes up to $94 on Dec 31, 2026
Included with entry: Includes a shirt
Fundraising: Takes optional donations when you register

Registration is open.

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Official race website

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Events and entry fees

Event	Distance	When	Entry fee	Cap
Duathlon	Duathlon	Jun 5, 20278:00 AM	$79$94 after Dec 31, 2026	–
Duathlon Relay	DuathlonRelay or team	Jun 5, 20278:00 AM	$135$140 after Dec 31, 2026	–
Triathlon	Sprint TriathlonSwim 600 yd · Bike 13 mi · Run 3.1 miOpen water swim	Jun 5, 20278:00 AM	$89$94 after Dec 31, 2026	–
Triathlon Relay	Sprint TriathlonSwim 600 yd · Bike 13 mi · Run 3.1 miRelay or teamOpen water swim	Jun 5, 20278:00 AM	$135$140 after Dec 31, 2026	–

Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.

The Duathlon fee goes up to $94 on Dec 31, 2026.

The swim at Tri-Shark Classic Triathlon & Duathlon

This is an open water swim at Evergreen Lake. The organizer's wetsuit note: wetsuits allowed per USA Triathlon rules.

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 Tri-Shark Classic Triathlon & Duathlon

Around June 5, Evergreen Lake typically runs about 76°F at the surface (71 to 78°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. 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

Duathlon: $79 until Dec 31, then $94 until Feb 28, then $99 until Apr 30, then $105 until Jun 3.
Duathlon Relay and Triathlon Relay: $135 until Dec 31, then $140 until Feb 28, then $145 until Apr 30, then $159 until Jun 3.
Triathlon: $89 until Dec 31, then $94 until Feb 28, then $99 until Apr 30, then $105 until Jun 3.

Online registration closes Jun 3, 2027, unless the race fills first.

Light and altitude

Sunrise on race morning is at about 5:25 AM, and the Duathlon starts at 8:00 AM. The start sits about 760 feet above sea level.

Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.

Start location and course

13001 Recreation Area Dr, Hudson, IL 61748

Directions to the start

The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.

Typical race-day weather

Around June 5 the day usually runs from 59°F at dawn to 79°F in the afternoon, with measurable rain on about 32% of days. Cold snaps dip to 54°F and hot years reach 87°F.

Based on 60 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: 13001 Recreation Area Dr, Hudson, IL 61748Map
Course: Road
Start elevation: About 760 feet
Included with entry: T-Shirt
Donations: Accepted when you register
Distances: Sprint Triathlon, Duathlon
Editions: 2027 (Jun 5, 2027), 2026 (Jun 6, 2026), 2025 (Jun 7, 2025), 2024 (Jun 1, 2024), 2023 (Jun 3, 2023), 2022 (Jun 4, 2022)

Organize this race? Add details or a correction

Quick answers

When is Tri-Shark Classic Triathlon & Duathlon?: Saturday, June 5, 2027, starting at 8:00 AM.
How much does it cost?: Entry starts at $79 before processing fees, and rises to $94 on Dec 31, 2026.
When does registration close?: Online registration closes Jun 3, 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, Duathlon.
Where does it start?: 13001 Recreation Area Dr, Hudson, IL 61748.

From the organizers

The Tri-Shark Classic Triathlon and Duathlon is the Bloomington-Normal area's premier Triathlon/Duathlon event. This Sprint Triathlon/Duathlon course boasts a flat, fast course through Comlara Park and surrounding areas.

Race Distances:

Tri-Shark Triathlon: 600 yard swim / 13 mile bike / 5K run.

Tri-Shark Duathlon: 2 mile run / 13 mile bike / 5K run.

Tri-Shark Classic website for more information: https://tri-shark.org/