From the Organizer
Kicking off at 8:00 p.m. on Friday, June 19, the Firefly 3K Fun Run offers a fun fitness challenge and a chance to enjoy stunning sunset views at The Morton Arboretum.
The Firefly 3K course will follow the main paved road on the Arboretum's East Side, moving through the Arboretum’s tree and plant collections, and down Frost Hill. The course is relatively flat and well-suited for runners, walkers, and wheelchair users of all experience levels.
Participants can run the Firefly 3K Fun Run at the Arboretum or participate virtually by completing the course distance at another location and logging the results online.
All Firefly 3K Fun Run and Virtual race participants will receive branded Firefly 3K apparel. Spectators will not receive branded apparel.
Firefly 3K Fun Run
Firefly 3K: $35 member, $45 guest
Virtual Participation
Firefly 3K: $25 member, $35 guest
Spectator Ticket
$15 member, $25 guest
Events
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
82°
Typical Low
59°
Based on US Climate Normals data from Lisle-Morton Arboretum, 2 mi from the venue.
Host City
Population
23,413
as of 2023
Elevation
709 ft
Nearest Airport
ORD
Chicago O'Hare International Airport · 16 mi
Time Zone
Central Time
From Endurance Grid
A mid-size host city. Enough lodging and amenities to keep race weekend easy, without big-city sprawl.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at Firefly 3K Fun Run, put it on the calendar, and turn “someday” into a start date.
Coming Up
Ben's Memorial Mile & Community Festival
4 miles away
SMG 5K Race & 1 Mile Run
4 miles away
Lester Fun Run 2025
4 miles away
Scarecrow Scramble
Less than a mile away
From Endurance Grid
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
Firefly 3K Fun Run
Jun 19, 2026