

Trail Mix Duathlon
Race Date
Oct 5, 2025
Location
Rockford, IL
Quick facts
- Date
- Sunday, October 5, 2025
- Location
- Rockford, Illinois
- Distance
- Half marathon (13.1 mi) + 14 Miles, 20 Miles, 10 Miles, 7 Miles
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Not listed
- Finishers on record
- 36
The Experience
This year we are hosting an off-road duathlon and a mountain bike race on the same day! Two distances for each event. The Trail Mix duathlon is a 2 mile run, 10 mile bike, 2 mile run (individual or team of 2 people, 1 runner and 1 biker) The Half Mix duathlon is a 2 mile run and 5 mile bike. The Trail Mix Competitive mountain bike race is 20 miles The Trail Mix Sport mountain bike race is 10 miles.
Sign up for both a duathlon and a mountain bike race and receive a 25% discount at checkout! The run loop is at https://www.strava.com/segments/29916486 and goes clockwise. The bike loop is at https://www.strava.com/segments/32772773 and goes counter-clockwise. Both courses and transition will be thoroughly marked. All of the events are at the Atwood Park Trail System, 7074 Rydberg Rd, Rockford, IL 61109. Both runs and the ride will be on the off-road trails. A mountain bike is strongly recommended. Sign up as an individual or a team consisting of 2 people. Professional chip timing by Tri-3 Sports Timing. Your entry includes a custom Purist water bottle, your choice of meal from Sizz n Fizz food truck, and ice cream from Dairyhäus on site! Prairie Street Brewhouse will also be on site with beer, soda, and water. There's not any packet pickup to worry about ahead of time. Pre-racing meeting for the duathlon will be at 8:45am. You must be checked in before then. The MTB course will be open for pre-riding at 11a with non race course trails open all day. Pre-race meeting at 11:45a. We will cap the total duathlon entries at 90 and the total mountain bike entries at 125. There is not race day sign up. 100% of proceeds for the duathlon will be donated to trail building at Atwood Park. This event is co-hosted by Rock River Multisport and Rockford Area Mountain Biking Alliance. Artwork donated by Aaron Johnson of Aaron Branding at www.aaronbranding.com.
Logistics
Race Day
Sunday, October 5, 2025
Start Time
9:00 AM
Start Location
7074 Rydberg Rd, Rockford, IL, 61109
Course Info
Course Type
Loop Course
Terrain
road
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
5 years running
~9 finishers a year
small race — neutral
11% returning runners
3 timing sources
runners from 2 states
winner 0:39:48
typical high 72°F
Race Day Weather
5-year historical avgStart (Low)
53°
Afternoon (High)
72°
Warm — hydration strategy is key, start conservatively
0.1"
Precipitation
11 mph
Wind
66%
Humidity
Historical Finish Times
How 36 finishers actually crossed the line across 5 years.
Most recent
2026
Total finishers
36
Median time
58:24
Latest turnout
9
States
3
Turnout by year
2022–2026
Hover the histogram to inspect specific finish times.
Frequently asked
When is the Trail Mix Duathlon?
The Trail Mix Duathlon is held on Sunday, October 5, 2025, starting at 9:00 AM.
Where does the Trail Mix Duathlon take place?
It takes place in Rockford, Illinois.
What distances does the Trail Mix Duathlon offer?
The half marathon (13.1 miles), plus 14 Miles, 20 Miles, 10 Miles, 7 Miles.
Is the Trail Mix Duathlon course flat and good for a PR?
The Trail Mix Duathlon is a ultra-flat, loop course course.
How many people run the Trail Mix Duathlon?
HalfRuns has finish records for 36 runners who have completed the Trail Mix Duathlon.
HalfRuns editorial — independent, no paid placement.
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