The River Run 2026
- Date
- Saturday, October 31, 2026
- Start time
- 10:00 AM start (New York)
- Location
- Simsbury, Connecticut
- Entry fee
- From Free · goes up to $45 on Oct 30, 2026
- 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 |
|---|---|---|---|---|
| 10K | 10K | Oct 31, 202610:00 AM | $40$45 after Oct 30, 2026 | – |
| 5K | 5K | Oct 31, 202610:00 AM | $35$40 after Oct 30, 2026 | – |
| Kids Run | Kids | Oct 31, 202611:30 AM | Free | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The 10K fee goes up to $45 on Oct 30, 2026.
Race day planning
Entry fee schedule
- 10K: $40 until Oct 29, then $45 until Oct 31.
- 5K: $35 until Oct 29, then $40 until Oct 31.
- Kids Run: Free until Oct 31.
Online registration closes Oct 31, 2026, unless the race fills first.
What a typical finish looks like
A typical finisher at a 10K in Connecticut runs 59:07, about 9:31 a mile, based on 22 races with published results. Women typically finish in 1:03:05 and men in 54:38.
Light and altitude
Sunrise on race morning is at about 7:21 AM, and the 10K starts at 10:00 AM. The start sits about 250 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
22 Iron Horse Blvd, Simsbury, CT 06070
The pin marks the address the race lists, which is usually the start. Course maps are the organizers' own.
2025 results
All results5K
10K
Aggregated from official results (The EMPIRE Timing Co.) for The River Run. Individual finisher names are not stored here.
How fast do you need to be at The River Run?
At the 2025 5K, the fastest tenth finished in 23:15 or better, the top quarter in 27:27, and half the field in 32:44; the last tenth came in after 46:11.
At the 2025 10K, the fastest tenth finished in 45:16 or better, the top quarter in 54:04, and half the field in 1:00:11; the last tenth came in after 1:17:28.
| Age | Women | Men |
|---|---|---|
| Under 20 | 21:44 | 22:02 |
| 20-29 | 24:49 | 20:42 |
| 30-39 | 23:04 | 20:38 |
| 40-49 | 24:45 | 20:26 |
| 50-59 | 26:27 | 25:12 |
| 60-69 | 29:44 | 21:55 |
| 70+ | 44:33 | 36:16 |
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.
How fast is it?
About average for Connecticut 5Ks
The fastest quarter of the 2025 5K field finished under 27:27, against 27:02 in a typical Connecticut 5K, so times here are about average.
- 10K: Slower than most Connecticut 10Ks. The fastest quarter of the 2025 10K field finished under 54:04, against 50:52 in a typical Connecticut 10K, so times here run 6 percent slower.
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 October 31 the day usually runs from 41°F at dawn to 58°F in the afternoon, with measurable rain on about 17% of days. Cold snaps dip to 33°F and hot years reach 75°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
- 22 Iron Horse Blvd, Simsbury, CT 06070Map
- Course
- Road
- Start elevation
- About 250 feet
- Results posted by the race
- Results Page
- Included with entry
- T-Shirt
- Donations
- Accepted when you register
- Distances
- 5K, 10K, Kids
- Editions
- 2026 (Oct 31, 2026), 2025 (Sep 27, 2025), 2024 (Sep 21, 2024), 2023 (Sep 23, 2023), 2022 (Sep 24, 2022)
Organize this race? Add details or a correction
Plan your race
Quick answers
- When is The River Run?
- Saturday, October 31, 2026, starting at 10:00 AM.
- How much does it cost?
- Entry starts at Free before processing fees, and rises to $45 on Oct 30, 2026.
- When does registration close?
- Online registration closes Oct 31, 2026, unless the race fills first.
- Do runners 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 can I run?
- 5K, 10K, Kids.
- How big is it, and how fast?
- In 2025, 446 runners finished the 5K; the median finish was 32:44 and the winner ran 17:26.
- Is it a fast course?
- The fastest quarter of the 2025 5K field finished under 27:27, against 27:02 in a typical Connecticut 5K, so times here are about average.
- Where does it start?
- 22 Iron Horse Blvd, Simsbury, CT 06070.
- Is there a course map?
- Yes, the organizers publish the route on MapMyRun; the link is under Start location and course.
From the organizers
****RACE POSTPONED: NEW DATE — OCTOBER 31****
The River Run will take place Saturday October 31 at 10:00 am in picturesque Simsbury, Connecticut. Featuring USATF certified 5k and 10k road races as well as 1 mile kid's races. This is a very flat course (PR flat) along smooth roads that border parks, Farmington River, bucolic farms, & lovely residential homes.
ENTRY FEES
5K Entry Fees: Up until 8/28 = $30; 8/29-9/25=$35; Race Day = $40
10K Entry Fees: Up until 8/28 = $35; 8/29-9/25 = $40; Race Day = $45
Kids Race: Free
All Registration Fees are Non-Refundable! Race Day registration opens at 8:30
T-SHIRTS
A free t-shirt is included with your 5k or 10k pre-registration. (Subject to availability)