Muddy Shamrock @ The Forge 2027
- Date
- Saturday, March 13, 2027
- Start time
- 9:00 AM start (Chicago)
- Location
- Lemont, Illinois
- Entry fee
- From $50 · goes up to $70 on Oct 14, 2026
- Included with entry
- Includes a shirt
Registration is open.
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Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Trail Half Marathon | Half Marathon | Mar 13, 20279:00 AM | $65$70 after Oct 14, 2026 | – |
| Trail Quarter Marathon | 10K | Mar 13, 20279:00 AM | $50$60 after Oct 14, 2026 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Half Marathon fee goes up to $70 on Oct 14, 2026.
Race day planning
Entry fee schedule
- Trail Half Marathon: $65 until Oct 14, then $70 until Jan 30, then $75 until Mar 14.
- Trail Quarter Marathon: $50 until Oct 14, then $60 until Jan 30, then $65 until Mar 14.
Online registration closes Mar 14, 2027, unless the race fills first.
How the price compares
At $65, entry is about 16 percent above a typical half marathon in Illinois, which costs $56 right now.
Light and altitude
Sunrise on race morning is at about 6:09 AM, and the Trail Half Marathon starts at 9:00 AM. The start sits about 660 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
227 Heritage Quarries Dr., Lemont, IL 60439
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Typical race-day weather
Around March 13 the day usually runs from 32°F at dawn to 49°F in the afternoon, with measurable rain on about 29% of days. Cold snaps dip to 19°F and hot years reach 67°F.
Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
Race details
- Where
- 227 Heritage Quarries Dr., Lemont, IL 60439Map
- Course
- Trail
- Start elevation
- About 660 feet
- Included with entry
- Shirt
- Distances
- 10K, Half Marathon
- Editions
- 2027 (Mar 13, 2027), 2026 (Mar 14, 2026), 2025 (Mar 15, 2025), 2024 (Mar 10, 2024), 2023 (Mar 18, 2023), 2022 (Mar 19, 2022)
Organize this race? Add details or a correction
Plan your race
Quick answers
- When is Muddy Shamrock @ The Forge?
- Saturday, March 13, 2027, starting at 9:00 AM.
- How much does it cost?
- Entry starts at $50 before processing fees, and rises to $70 on Oct 14, 2026.
- When does registration close?
- Online registration closes Mar 14, 2027, unless the race fills first.
- Is the entry fee high for Illinois?
- At $65, entry is about 16 percent above a typical half marathon in Illinois, which costs $56 right now.
- Do runners get a shirt or medal?
- Entry includes a shirt, according to the race's registration page. Check it for sizes and whether kids' races get the same.
- What distances can I run?
- 10K, Half Marathon.
- Where does it start?
- 227 Heritage Quarries Dr., Lemont, IL 60439.
From the organizers
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.