Allerton Races
Race Date
Apr 11, 2026
Location
Monticello, IL
The Experience
Trail/Road Half Marathon, 10K Run/Walk, or nighttime Trail-Glo 5K Run/Walk, benefitting Robert Allerton Park! Trail-Glo 5K start time is 8:30PM 11 April. Half Marathon and 10K start time is 9:00AM 12 April. More race info at our website! Help us help Make-A-Wish families! For our 14th consecutive year, Allerton Races is fundraising for Make-A-Wish Illinois. Be a "Wish Warrior" by donating $10 or more, and you'll get a special logo on the sleeve of your race T! (If you register with a race T) Donate to Make-A-Wish Illinois by clicking HERE!
Logistics
Race Day
Saturday, April 11, 2026
Start Time
9:00 AM
Giveaway
Tech T-Shirt
Start Location
515 Old Timber Rd, Monticello, IL, 61856
Course Info
USATF CertifiedCourse Type
Loop Course
Terrain
road
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
USATF Certified Course
IL18002JW · Expires 2028 · Alpine Races Half Marathon
Relatively flat with minimal net elevation change. Loop course — start and finish are close together.
Historical Performance
Median Finish
2:11:02
10:00/mi
Winning Time
1:16:15
5:49/mi
Finishers (2025)
96
States Represented
5 / 50
Gender Split
Finish Time Distribution
FASTER 25%
1:55:51
MEDIAN
2:11:02
SLOWER 25%
2:30:46
Race Day Weather
5-year historical avgStart (Low)
43°
Afternoon (High)
64°
Pleasant conditions — light layers at start, comfortable by finish
0.1"
Precipitation
15 mph
Wind
61%
Humidity
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