18th Annual F^3 Lake Half Marathon & 5k

This Earth Day weekend, Humboldt Park becomes a place of action, not just awareness.

Rooted in collaboration with the Humboldt Park Advisory Council, the Humboldt Park Earth Day Committee, and NVIRO, the weekend brings together residents from across Chicago and the surrounding suburbs for a shared celebration of community, sustainability, and movement.

The 5K for Earth Day is the culmination of a two day, Earth Day focused weekend centered on care for the land and forward momentum.

Day one is about restoration.

Plant a tree. Clean the park. Give back to the land.

Day two is about momentum.

Cross the finish line together.

After a 13 year hiatus, the 5K for Earth Day returns not out of tradition, but out of responsibility. A responsibility to bring people together around the environment, movement, and community, and to remind us that local action still matters.

Set within one of Chicago’s most iconic green spaces, the race welcomes runners, joggers, walkers, families, and first timers alike. Participation matters more than pace.

The weekend begins Saturday, April 18, with park wide cleanup and restoration at the Humboldt Park Fieldhouse and concludes Sunday, April 19, at the boathouse as participants cross the finish line together for the return of the annual 5K for Earth Day.

This is more than a race.

It’s a shared moment to reconnect with the city, the planet, and each other.

What to expect:

• A clearly marked 5K course through Humboldt Park

• An inclusive atmosphere for all ages and abilities

• A weekend centered on environmental action

Come show up for the planet.

Come move your body.

Come be part of an Earth Day weekend that ends with momentum.

Register today and help turn intention into action.

SBM Stride for Science Run/Walk

Thursday, April 23, 2026

6:30 a.m. Start

Grant Park (Corner of E. Balbo Drive and DuSable Lake Shore Drive, Chicago)

Registration Information

Registration is now open! You may register online here or through the Annual Meeting registration form. A minimum $40 donation guarantees a run/walk shirt, sunglasses, and race bib. All proceeds support postdoctoral research through SBM's Bridging the Gap Research Award.

The ASU Alumni Association, in support of the Pat Tillman Foundation, is proud to coordinate Tillman Honor Runs, hosted by ASU Alumni Chapters & Clubs around the United States.

Join us to run or walk 4.2 miles and raise money to support the Tillman Scholar program. Tillman Honor Runs are casual, family-friendly, in-person fun runs. Participate and register in one of the following cities.

This year, all adult registrants will receive an official 2026 Pat's Run race shirt and race medal; kid's run participants will receive the kid's run shirt and kid's finishing award. All race packets will be shipped and tracking information will be shared upon fulfillment, which will come closer to the time leading up to race day.

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