When is Muddy Shamrock?

Muddy Shamrock takes place on Mar 14, 2026. That's in 2 weeks.

Where is Muddy Shamrock located?

Muddy Shamrock is held in Lemont, Illinois, United States.

What distances are available at Muddy Shamrock?

Muddy Shamrock offers the following distances: 13.1M, 6.6M.

How do I register for Muddy Shamrock?

You can register for Muddy Shamrock through the official registration page.

What is the typical weather for Muddy Shamrock?

Based on historical data, you can expect temperatures between 30°F and 48°F on race day. There's approximately a 12% chance of precipitation.

Muddy Shamrock (6.6M-13.1M) - Mar 14, 2026 | Lemont, IL

Prepare for an invigorating start to your trail running season at the Muddy Shamrock, returning to Lemont, IL, on Saturday, March 14, 2026. This popular early-season event, celebrated for its unique course and vibrant atmosphere, offers challenging 13.1-mile (Half Marathon) and 6.6-mile (Quarter Marathon) distances, promising an authentic off-road experience. Held within the picturesque setting of The Forge: Lemont Quarries, the Muddy Shamrock is an exhilarating challenge for both seasoned trail enthusiasts and newcomers.

Runners will navigate a dynamic course featuring wooded single and double-track mountain bike trails, interspersed with sections of gravel, all set against the backdrop of the historic Lemont Quarries and I&M Canal. Expect varied terrain including dirt, roots, rocks, and the namesake mud, with a few technical spots presenting short but steep inclines and downhills to test your mettle. While generally not featuring significant elevation changes, the diverse surfaces make trail running shoes a recommended choice. Participants will complete one lap for the Quarter Marathon and two laps for the Half Marathon, all beginning and ending at a common start/finish line within The Forge. One aid station, offering water and sports drinks, will be available at the start of the second lap for half marathoners, though runners are encouraged to carry their own hydration and fuel as the race aims to be cupless. Typical race day conditions in mid-March often see highs around 48°F and lows near 30°F, with a 12% chance of precipitation, creating the potential for an even more "muddy" adventure.

Beyond the challenging trails, the Muddy Shamrock fosters a strong sense of camaraderie and celebration. Your race entry includes chip-timed results, the chance for overall and age group awards, a commemorative Muddy Shamrock t-shirt, and a lively post-race party complete with food, beer, and music. Embrace the mud, the camaraderie, and the stunning scenery for an unforgettable trail running experience.