Course
A lapped trail race on the single and double-track mountain bike trails and gravel paths of The Forge and adjoining trail systems in Lemont. Underfoot is dirt, grass, rocks, mud, roots and stumps, with several short but steep climbs and descents; gravel sections are mostly flat. Half marathon runners complete two loops and quarter marathon runners one, from a common start/finish.
Key dates
- !RegistrationOpen now
- ★Race daySat 13 Mar 2027
About
A trail half marathon and quarter marathon on the single- and double-track mountain-bike trails around the historic Lemont Quarries in Illinois. Footing varies between dirt, grass, rock and roots, with several short but steep technical climbs and descents. One aid station serves the half marathon.
Save Muddy Shamrock @ The Forge to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Castle Ridge Shamrock Shuffle 5K
Starts at Castle Ridge resort on Lake Centralia
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Shorewood Shuffle
Flat loop through Four Seasons Park in Shorewood
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Blarney Blitz
Along the Illinois River on Peoria's Riverfront Trail
A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.