Race Discovery
Firefly 3K Fun Run

Firefly 3K Fun Run

Lisle, Illinois, United States View on map
Jun 19, 2026 (America/Chicago local time)
Running

About this race

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.

Virtual Participation

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.

Pricing

Firefly 3K Fun Run
Firefly 3K: $35 member, $45 guest

Virtual Participation
Firefly 3K: $25 member, $35 guest

Spectator Ticket
$15 member, $25 guest

Pick your distance

Running

Firefly 3K Fun Run

Jun 19, 2026 3K 8:00 PM
$50.00
Closed

Virtual Firefly 3K

Virtual runners are not eligible for awards or completion medals.

Jun 19, 2026 3K 8:00 AM
$30.00
Closed

Typical race-day weather

Based on 7 years of historical conditions on this event's race dates in Lisle.

Temp (°C)
Minimum temperature (race-day average) 8.7° / Maximum temperature (race-day average) 19.2°
Feels Like (°C)
Minimum feels like — heat index / wind chill (race-day average) 5.6° / Maximum feels like — heat index / wind chill (race-day average) 19.2°
Wind (km/h)
Average wind speed (race-day average)
20.8
Precip (mm)
Average precipitation (race-day average)
2.7mm
Humidity
Average relative humidity (race-day average)
67.3%

Course

Route map and elevation profile

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

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Different organizers, within 40 miles, in the next three months

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Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.

  • Entries, prices, waves and inclusions — the event's official registration page
  • Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
  • Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
  • Comparisons and counts — Race Discovery calendar, 8 Lisle events

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