5.7 mi2 miRegistration open

Allerton Park Trail Run

Monticello, Illinois
Entry from
$35
Days to go
19

At a glance

Date
Oct 25, 2026
Location
Monticello, Illinois
Distances
5.7 mi, 2 mi
Registration
Registration open until Oct 25, 2026, via runsignup.com
Official site
runsignup.com
Listed from
RunSignUp
Last checked
Oct 5, 2026

Plan this race for free

Aid stations, cutoffs and pacing in one plan, with the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.

Build my plan

About this race

Second Wind Running Club welcomes you to the Allerton Park Trail Run!

Let's hit the trails!  A good portion of the 5.7-mile course follows the Sangamon River which has proven quite challenging over the years.  Runners may find hidden roots, ruts, sharp turns, and other obstacles.  We donate a portion of the proceeds back to Allerton Park for trail maintenance or park enhancements. Our donations have been used towards a railing at a dangerous spot, trail erosion control, recycle bins, water fountain bottle filling station, a new café in the visitor's center, and more. We feel quite fortunate that the park allows us to bring so many into it and pound the trails!

Can't join us on race day 10/25/26?  Sign-up for the VIRTUAL option instead!  Please note that you will not be eligible for any age-group awards.  Virtual results can be entered from 10/25/26 through 10/31/26.

Want to receive a race shirt?  Deadline to register and guarantee a shirt is Wednesday, October 14th, 2026.

Don't want a race shirt?  No problem!  Select 'no shirt' instead of a size from the drop-down box during registration.  

If participating in this race will qualify you for the Monticello Triple Crown, you MUST register by Wednesday, October 14th, 2026.

The race ends in the meadow where you can gather with family and friends. With the race close to Halloween, we'd love to see costumes out on the trails!  Stay after the race for the overall 5.7-mile trail run awards (top male, top female, top male masters, top female masters), age group awards (top 3 M/F; 19 and under, 20-29, 30-39, 40-49, 50-59, 60-69, 70+).  The 2-mile nature walk is non-competitive and no awards will be given for this event.  Door prizes and costume contest prizes will be given as well!

Registration is via this page only and will end promptly on race day, October 25th, at 8:30am.

Volunteers needed!  Even if you register for either activity (Trail Run or Nature Walk) for Sunday October 25th, 2026, you can also volunteer. Responsibilities will vary based on the opportunity you sign up for. The Race Director, a volunteer captain, or team lead will be available to provide direction or guidance as needed. Other experienced volunteers can also provide insights and advice. Further instructions and possibly training as needed or requested will be provided closer to the day of the event.

For safety purposes, no dogs allowed on the trail run or the nature walk.

Key dates

Registration opens

Apr 5, 2026

Tier 1 ends

Apr 13, 2026

Registration closes

Oct 25, 2026

19d

Race day

Oct 25, 2026

19d

Tier 2 ends

Oct 25, 2026

19d

Pricing

2 Mile Nature Walk

Tier 2, until Oct 25, 2026

$35

5.7 Mile Trail Run

Tier 2, until Oct 25, 2026

$35

VIRTUAL 5.7 Mile Trail Run

Tier 2, until Oct 25, 2026

$35

Email me updates about Allerton Park Trail Run

Registration openings and major changes, like a new date or a cancellation.

Entry transfers

Can't race, or need an entry? Post it here so nobody has to ask if it's still available.

Similar races

Straight-line distance

All races in Illinois
All October races
Race planning

Plan Allerton Park Trail Run with Crewable

Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.

Build my plan

Are you the race director for Allerton Park Trail Run?

Claim this race to manage registration, volunteers, and race day.

Claim your race