In 132 days · Sat, Mar 13, 2027
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Saturday, March 13th, 2027
227 Heritage Quarries Dr., Lemont IL
Half · 10K
30–48°F · some rain risk
See last 10 years
On this date: rain 2 of the last 10 years
2026
33–47°F
dry
2025
34–60°F
dry
2024
44–67°F
dry
2023
26–34°F
dry
2022
18–53°F
dry
2021
28–55°F
dry
2020
31–47°F
dry
2019
39–62°F
rain
2018
23–37°F
dry
2017
25–31°F
rain
Best months to race in Illinois →
About this race
2026 Muddy Shamrock Results
Woods, dirt, mud, roots, and maybe some other adventurous trail stuff will be experienced at the 6th annual Muddy Shamrock Trail Races @ The Forge. And now that we've earned the 4th leaf in our clover, the race is now named the MUDDY SHAMROCK!
This early-season trail race will be run on wooded single & double-track trails with awesome scenery around the historic Lemont Quarries. Both races will traverse the single-track MTB trails within the woods and some gravel trails throughout the Forge and adjoining trail systems.
Course map
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Run clubs near Lemont to train with before race day.
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