Endure Ultra Triathlon - Big Creek State Park 2027
- Date
- 4 race dates, June 7 to 11, 2027
- Start time
- 7:00 AM start (Chicago)
- Location
- Polk City, Iowa
- Entry fee
- From $395 · goes up to $445 on Feb 1, 2027
- Included with entry
- Includes a shirt
- Fundraising
- Takes optional donations when you register
Registration is open.
We earn a small commission when you register through this link, at no cost to you. Details
Official race websiteAdd to calendar: Apple or Outlook · Google
Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Monday, Jun 7, 2027 | ||||
| 1 x 5 Ultra Triathlon (Solo) | Full Iron TriathlonSwim 2.4 mi · Bike 112 mi · Run 26.2 miOpen water swim | Jun 7, 20277:00 AM | $1980$2030 after Jan 31, 2027 | – |
| Quintuple Aquavelo (Solo) | AquabikeOpen water swim | Jun 7, 20277:00 AM | $1980$2030 after Feb 1, 2027 | – |
| Quintuple Duathlon (Solo) | Duathlon | Jun 7, 20277:00 AM | $1980$2030 after Feb 1, 2027 | – |
| Quintuple Ultra Triathlon (Solo) | Full Iron TriathlonOpen water swim | Jun 7, 20277:00 AM | $1980$2030 after Feb 1, 2027 | – |
| Quintuple Ultra Triathlon (Team of 2) | Full Iron TriathlonRelay or teamOpen water swim | Jun 7, 20277:00 AM | $1980$2030 after Feb 1, 2027 | – |
| Quintuple Ultra Triathlon (Team of 3) | Full Iron TriathlonRelay or teamOpen water swim | Jun 7, 20277:00 AM | $1980$2030 after Feb 1, 2027 | – |
| Wednesday, Jun 9, 2027 | ||||
| 1 x 3 Ultra Triathlon (Solo) | Full Iron TriathlonSwim 2.4 mi · Bike 112 mi · Run 26.2 miOpen water swim | Jun 9, 20277:00 AM | $1185$1235 after Feb 1, 2027 | – |
| Thursday, Jun 10, 2027 | ||||
| Triple Aquavelo (Solo) | AquabikeOpen water swim | Jun 10, 20277:00 AM | $1185$1235 after Feb 1, 2027 | – |
| Triple Duathlon (Solo) | Duathlon | Jun 10, 20277:00 AM | $1185$1235 after Feb 1, 2027 | – |
| Triple Ultra Triathlon Relay (Team of 2) | Full Iron TriathlonRelay or teamOpen water swim | Jun 10, 20277:00 AM | $1185$1235 after Feb 1, 2027 | – |
| Triple Ultra Triathlon Relay (Team of 3) | Full Iron TriathlonRelay or teamOpen water swim | Jun 10, 20277:00 AM | $1185$1235 after Feb 1, 2027 | – |
| Triple Ultra Triathlon (Solo) | Full Iron TriathlonOpen water swim | Jun 10, 20277:00 AM | $1185$1235 after Feb 1, 2027 | – |
| Friday, Jun 11, 2027 | ||||
| Double Ultra Triathlon Relay (Team of 2) | Full Iron TriathlonSwim 4.8 mi · Bike 224 miRelay or teamOpen water swim | Jun 11, 20277:00 AM | $790$840 after Feb 1, 2027 | – |
| Double Ultra Triathlon Relay (Team of 3) | Full Iron TriathlonSwim 4.8 mi · Bike 224 miRelay or teamOpen water swim | Jun 11, 20277:00 AM | $790$840 after Feb 1, 2027 | – |
| Double Ultra Triathlon (Solo) | Full Iron TriathlonSwim 4.8 mi · Bike 224 miOpen water swim | Jun 11, 20277:00 AM | $790$840 after Feb 1, 2027 | – |
| Single Ultra Triathlon (Solo) | Full Iron TriathlonSwim 2.4 mi · Bike 112 mi · Run 26.2 miOpen water swim | Jun 11, 20277:00 AM | $395$445 after Feb 1, 2027 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Full Iron Triathlon fee goes up to $445 on Feb 1, 2027.
Race day planning
Entry fee schedule
- 1 x 5 Ultra Triathlon (Solo): $1980 until Jan 31, then $2030 until May 1, then $2080 until Jun 7.
- Quintuple Aquavelo (Solo) and Quintuple Duathlon (Solo) and Quintuple Ultra Triathlon (Team of 2) and Quintuple Ultra Triathlon (Team of 3): $1980 until Feb 1, then $2030 until May 1, then $2080 until Jun 7.
- Quintuple Ultra Triathlon (Solo): $1980 until Feb 1, then $2030 until May 1, then $2080 until Jun 6.
- 1 x 3 Ultra Triathlon (Solo): $1185 until Feb 1, then $1235 until May 1, then $1285 until Jun 9.
Online registration closes Jun 9, 2027, unless the race fills first.
Light and altitude
Sunrise on race morning is at about 5:40 AM, and the 1 x 5 Ultra Triathlon (Solo) starts at 7:00 AM. The start sits about 930 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
8794 NW 125th Ave, Polk City, IA 50226
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 7 the day usually runs from 61°F at dawn to 81°F in the afternoon, with measurable rain on about 33% of days. Cold snaps dip to 54°F and hot years reach 88°F.
Based on 70 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
- 8794 NW 125th Ave, Polk City, IA 50226Map
- Course
- Road
- Start elevation
- About 930 feet
- Included with entry
- T-Shirt
- Donations
- Accepted when you register
- Distances
- Full Iron Triathlon, Duathlon, Aquabike
- Editions
- 2027 (Jun 7, 2027)
Organize this race? Add details or a correction
Quick answers
- When is Endure Ultra Triathlon - Big Creek State Park?
- It runs on 4 dates from June 7 to 11, 2027. The next is Monday, June 7, 2027, starting at 7:00 AM.
- How much does it cost?
- Entry starts at $395 before processing fees, and rises to $445 on Feb 1, 2027.
- When does registration close?
- Online registration closes Jun 9, 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?
- Full Iron Triathlon, Duathlon, Aquabike.
- Where does it start?
- 8794 NW 125th Ave, Polk City, IA 50226.
From the organizers
Endure Ultra Triathlon will be racing at Big Creek State Park, Iowa!! Athletes come experience the fast flat course of beautiful Big Creek State Park just outside of the state capitol Des Moines in Polk City. Join us for an fast race through Big Creek State Park, where every step brings you closer to discovering what you can ENDURE. Join us for a chance to test your limits and immerse yourself in the ultra-triathlon community. Your limits will be tested, both physically and mentally, but the person you discover along the way is what allows you to endure even the unthinkable. Don’t let doubt keep you from achieving what you were set out to endure in life.