Great Western Half-Marathon & 10K

St. Charles, United States • 3 May 2026

Event Overview

The Great Western Half-Marathon & 10K is hosted by the Fox River Trail Runners. The event has a history of over 25 years. The event features two distances: a half-marathon and a 10K.

Course Details

Both races are described as competitive and flat out-and-back courses. They take place on the Great Western Trail, which is a public use path on a former railway line. The western portion of the trail is used.

Event Date and Charity

The event is scheduled for a Sunday in early May. The organizing club donates $5 from each participant's registration fee to charity. Additional participant donations are also collected. These funds are split equally among three local non-profit mental health charity partners. In a previous year, the combined donations totaled $4,000 for the three charities. Visit the organization's website for the most recent information.

Race information

Half Marathon
Half Marathon
10 km
10k
Visit the organization's website for the most recent information.
Trail runs nearby

Experience a 4 mile trail run through the historic St James Farm in Warrenville. Enjoy a scenic single loop course featuring rolling terrain, limestone paths, and wooded trails with awards for multiple age categories.

Celebrate Earth Day on the trails at Veteran Acres park. Choose from a 50K, 15-mile, or 5-mile loop on scenic single-track. The event focuses on being landfill-free and offers awards for top finishers.

Run through the scenic rolling trails of the Morton Arboretum on a USATF certified 10K course. Enjoy a lively post race party with live music and refreshments while supporting vital tree conservation and research.

A whimsical trail run in Deer Grove Forest Preserve featuring four distances on a wide, non-technical looped course. The event, organized by CUSS Running, includes inclusive community initiatives. One aid station at the start/finish support..