The Great River Challenge, Off-road Triathlon 2026
- Date
- Saturday, October 3, 2026
- Start time
- 10:00 AM start (New York)
- Location
- Northfield, Massachusetts
- Entry fee
- From $55
- 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 |
|---|---|---|---|---|
| 2 Person Junior (20 & under) Triathlon Short Course | Kids TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $88 | – |
| 2 Person Relay Team Triathlon Long Course | Half Iron TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $115 | – |
| 2 Person Relay Team Triathlon Short Course | Sprint TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $115 | – |
| 3 Person Junior (20 & under) Triathlon Short Course | Kids TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $132 | – |
| 3 Person Relay Team Triathlon Long Course | Half Iron TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $180 | – |
| 3 Person Relay Team Triathlon Short Course | Sprint TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $180 | – |
| 3 Woman Relay Team Triathlon Long Course | Half Iron TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $180 | – |
| 4 Grand Master 70+ Relay Team Triathlon Short Course | Sprint TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $220 | – |
| 4 Person Relay Team Triathlon Long Course | Half Iron TriathlonRelay or teamOpen water swim | Oct 3, 202610:00 AM | $220 | – |
| Solo Junior Triathlon Short Course | Kids TriathlonOpen water swim | Oct 3, 202610:00 AM | $55 | – |
| Solo Triathlon Female Long Course | Half Iron TriathlonOpen water swim | Oct 3, 202610:00 AM | $75 | – |
| Solo Triathlon Female Short Course | Sprint TriathlonOpen water swim | Oct 3, 202610:00 AM | $75 | – |
| Solo Triathlon Male Long Course | Half Iron TriathlonOpen water swim | Oct 3, 202610:00 AM | $75 | – |
| Solo Triathlon Male Short Course | Sprint TriathlonOpen water swim | Oct 3, 202610:00 AM | $75 | – |
| Solo Triathlon SUP Short Course | 11.25 MilesOpen water swim | Oct 3, 202610:00 AM | $75 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
Race day planning
Entry fee schedule
- 2 Person Junior (20 & under) Triathlon Short Course: $88 until Oct 2.
- 2 Person Relay Team Triathlon Long Course and 2 Person Relay Team Triathlon Short Course: $115 until Oct 2.
- 3 Person Junior (20 & under) Triathlon Short Course: $132 until Oct 2.
- 3 Person Relay Team Triathlon Long Course and 3 Person Relay Team Triathlon Short Course and 3 Woman Relay Team Triathlon Long Course: $180 until Oct 2.
Online registration closes Oct 2, 2026, unless the race fills first.
Light and altitude
Sunrise on race morning is at about 6:47 AM, and the 2 Person Junior (20 & under) Triathlon Short Course starts at 10:00 AM.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
Northfield Mountain Recreation Center, 99 Millers Falls Rd., Northfield, MA, Northfield, MA 01360
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
2025 results
All results (2 years)Solo Triathlon Male Long Course
Solo Triathlon Male Short Course
3 Person Relay Team Triathlon Long Course
Aggregated from official results (Fast Track Timing LLC) for The Great River Challenge, Off-road Triathlon. Individual finisher names are not stored here.
How fast do you need to be at The Great River Challenge, Off-road Triathlon?
At the 2025 Solo Triathlon Male Long Course, the fastest tenth finished in 2:27:11 or better, the top quarter in 2:33:34, and half the field in 2:58:36; the last tenth came in after 3:19:49.
At the 2025 Solo Triathlon Male Short Course, the fastest tenth finished in 1:51:24 or better, the top quarter in 1:57:49, and half the field in 2:12:37; the last tenth came in after 2:26:31.
At the 2025 3 Person Relay Team Triathlon Long Course, the fastest tenth finished in 2:02:57 or better, the top quarter in 2:08:11, and half the field in 2:24:45; the last tenth came in after 2:33:23.
| Age | Women | Men |
|---|---|---|
| 40-49 | n/a | 2:50:15 |
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 2025.
Finishers by year
Down 33 percent since 2023.
All events combined, from official results.
The Great River Challenge, Off-road Triathlon Half Iron Triathlon year by year
From 2023 to 2025, the field went from 26 to 13 finishers, and the median time rose from 2:50:50 to 2:58:36.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2025 | 13 (-50%) | 2:58:36 | under 2:27:11 | 1:59:06 |
| 2023 | 26 | 2:50:50 | under 2:17:27 | 1:57:56 |
From each year's official results for the Half Iron Triathlon; virtual options are left out.
Race details
- Where
- Northfield Mountain Recreation Center, 99 Millers Falls Rd., Northfield, MA, Northfield, MA 01360Map
- Course
- Road
- Included with entry
- T-Shirt
- Donations
- Accepted when you register
- Distances
- Kids Triathlon, Sprint Triathlon, Half Iron Triathlon
- Editions
- 2026 (Oct 3, 2026), 2025 (Oct 4, 2025), 2024 (Oct 5, 2024), 2023 (Oct 7, 2023), 2022 (Oct 8, 2022), 2021 (Oct 9, 2021)
Organize this race? Add details or a correction
Plan your race
Quick answers
- When is The Great River Challenge, Off-road Triathlon?
- Saturday, October 3, 2026, starting at 10:00 AM.
- How much does it cost?
- Entry starts at $55 before processing fees.
- When does registration close?
- Online registration closes Oct 2, 2026, 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?
- Kids Triathlon, Sprint Triathlon, Half Iron Triathlon.
- How big is it, and how fast?
- In 2025, 13 athletes finished the Solo Triathlon Male Long Course; the median finish was 2:58:36 and the winner finished in 1:59:06.
- Where does it start?
- Northfield Mountain Recreation Center, 99 Millers Falls Rd., Northfield, MA, Northfield, MA 01360.
From the organizers
RACE DESCRIPTION
Location: Northfield Mountain Recreation Center, 99 Millers Falls Rd., Northfield, MA 01360
The Great River Challenge is a triathlon event in the non-traditional category, being a paddle, run and bike event. We have safety on land and water as well as water stations throughout the course, making sure your experience is fun, challenging and safe! The timing is run by Fast Track Timing, who use timing chips to ensure accurate segment and transition times, so you can have record of every stage of the race.
Long Course