Muddy Shamrock @ The Forge

MAR
14
2026
Early-season trail races at The Forge in Lemont include a half marathon and a quarter marathon over wooded single and double track MTB trails and some gravel. Courses feature varied terrain, technical sections, and a common start and finish.
Sat 14 Mar 2026
13 miles 7 miles

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Muddy Shamrock @ The Forge

The Muddy Shamrock @ The Forge takes place on March 14, 2026, at The Forge: Lemont Quarries, 227 Heritage Quarries Dr., Lemont, IL 60439. The event includes two trail race distances run on shared start and finish areas.

  • Trail Half Marathon: approximately 13.1 miles, completed as two laps
  • Trail Quarter Marathon: approximately 6.6 miles, completed as one lap

The courses run on wooded single and double track mountain bike trails and on some gravel trails within The Forge and adjoining trail systems. Surfaces and features include dirt, grass, rocks, mud, roots, and stumps. A few sections are technical with several short but steep inclines and downhills; gravel sections are mostly flat. Trail running shoes are recommended.

There is one aid station offering water and sports drinks located at the start of the second lap for the half. Runners are expected to carry personal hydration and fuel as the event aims to limit or go cupless for the 2025 edition.

Packet pick-up is offered at local locations and on race day at The Forge. Race entry benefits listed by the organizer include chip-timed results with live splits, earned overall and age group awards, a Muddy Shamrock T-shirt, and post-race food, beer, and music. Awards include overall and age group prizes plus masters and mid-pack recognitions. Visit the organization's website for the most recent information.

13 mi
Trail Half Marathon
7 mi
Trail Quarter Marathon