learn more about the Monticello Triple Crown

Allerton Trails Half Marathon &10K Race

April 6-7, 2018 - Robert Allerton Park and Retreat Center - Monticello, IL

Register Here!!! And... Follow Us On Facebook!!! And... Check out our "Sights and Sounds" 2013 race video!


Packet pickup at Allerton Park Visitor Center 5-8:15P before the Friday 5K, and Saturday morning 7:15-8:45A.

The Half Marathon (9AM Start)

Download the Course map on PDF

The 2017 Half Marathon course features a run right through a barn as you pass through the Diversified Farm! Ultimate photo op!

Two small sections of the course are run on the beautiful asphalt road from the starting line, across the Sangamon, and to the first trailhead. This enables a long, wide starting field that thins down in plenty of time to hit the double-track Schroth Trails. The first half (identical to 10K) winds through heavily wooded moderate terrain above the Sangamon River, circles through the historic Lost Garden and into a gorgeous meadow, crosses the river again, then proceeds to a meadow trail loop and a Sunken Garden/ Centaur/ Sun Singer tour before finally finishing with a 150-yard dash between the FuDogs right to the foot of the beautiful tower! In both course versions (high and low river), we're eliminating the South Allerton Road/South Entrance segment, keeping the two races together, and making up the distance with our new stretch of trails! Register Here!

FuDog Trailhead opens to the ATHM finish area
The FuDog Trailhead, which opens to the ATHM finish area