As Suburban Chicago Bicycling reported, local bicyclists found the Salt Creek Greenway Trail underpass at I-294 open on July 10 for the first time in years. There was no reopening announcement or sign confirming it was safe to use. Riders rode through. By July 11, members of the Cycle Brookfield club were reporting the news to each other: the underpass connecting Oak Brook to the Cook County forest preserves on the other side of the tollway was open again.
No official reopening announcement had been made at that point.
For people who use the trail, the key distinction is between the underpass reopening and the Park District's later confirmation.
A Timeline That Kept Slipping
The Village of Oak Brook first put out a detour notice back in the fall warning that the underpass closure, tied to reconstruction of the I-294 bridge overhead, would last through winter, with the trail expected to reopen in mid-May 2026. Mid-May came and went with the crossing still fenced off.
By June 8, the Illinois Tollway and the Cook County Forest Preserve District issued a joint update revising the projected reopening. The underpass was now "anticipated" to reopen in late summer, weather dependent, with a specific punch list still outstanding: finishing the I-294 bridge reconstruction itself, widening and resurfacing the trail, bridge aesthetic work, new railing, and restoration of the underpass structure. No firm date was given.
Cyclists checked the underpass on July 10 and found it open.
The Oak Brook Park District posted its confirmation that the trail was open for community use in the third week of August, roughly six weeks after riders had already been using it and more than three months after the original mid-May target.
What You Can Actually Reach From Here
The new bridge over the underpass marks the boundary in a literal way. One wall reads "Welcome to Oak Brook Park District." The other, on the far side, reads "Welcome to Forest Preserves of Cook County." You are standing at the exact seam between two park systems every time you cross it.
From that point, the trail splits into two very different experiences.
| Direction | What's along the way | What it feels like |
|---|---|---|
| West, back toward Oak Brook | Dean Nature Sanctuary, with a small loop option, then a stretch running alongside York Road with a quick detour south to Fullersburg Woods, or a longer push north toward Busse Woods in Elk Grove Village | Shorter local loops if you want a half hour, or a genuine long-distance ride if you keep going |
| East, into Cook County | Bemis Woods, then Salt Creek Woods and Possum Hollow Woods, ending at Brookfield Zoo | About seven miles one-way, mostly shaded and away from traffic, with only one signaled street crossing at La Grange Road |
Dogs are welcome on this stretch of trail as long as they're leashed, which matters if your usual evening loop has been the sidewalk along Oak Brook Road for the last couple of years while the underpass sat fenced off.
The Same Park District Is About to Get Very Busy
Here's the part that changes how you should think about the next few weeks. The Oak Brook Park District, the same organization that just confirmed the trail reopening, is about to host the two biggest single events on its calendar all year, both at the Sports Core Fields off Oak Brook Road.
From September 9 through 13, the Healing Field returns to the Oak Brook Polo Grounds at 700 Oak Brook Road. The display puts close to 3,000 individually named flags on the field, each one honoring a person lost on September 11, 2001, and this year's installation marks the 25th anniversary of the attacks. It's free, open 24 hours a day for the full five days, and includes a September 11 remembrance ceremony with a wreath placement and Bugles Across America, followed by a September 13 closing event with a reading of the names, a motorcycle "Ride to Remember," and a flag flown from an Oak Brook Fire Department ladder truck.
Then, on the evening of Saturday, September 12, right in the middle of the Healing Field's run, the Village is holding a one-time "America 250" celebration at the same Sports Core Fields. Gates open at 5 p.m. with DJ sets and live '90s tribute bands on the Ace Stage, including a Pearl Jam tribute and a Red Hot Chili Peppers tribute, running until 8:30. After that, CD Peacock is putting on a 300-plus drone display followed by a fireworks show running more than 25 minutes, with the whole event wrapping around 9:30 p.m. It's free, but organizers are already telling people to arrive early for parking and are setting up a rideshare drop-off point, because they're expecting more than 15,000 people.
Patch's own event listing points out the obvious overlap: anyone visiting the Healing Field that Saturday has an easy reason to stay and walk over to the America 250 celebration once the sun goes down. Which means September 12 is shaping up to be the single busiest evening at that corner of Oak Brook all year, concentrated at the exact Park District campus that manages the trailhead you'd normally use to reach the newly reopened underpass.
What This Actually Means for the Next Few Weekends
If your plan has been to wait for cooler weather before testing the reopened crossing, August 29 to 30 was a clear window, and September 5 to 6 is the next. After that, the Sports Core corridor gets crowded and stays that way through September 13, with the heaviest single burst of traffic and parking pressure landing on the evening of September 12.
None of this touches the trail itself once you're past Dean Nature Sanctuary heading toward Bemis Woods. The crowds are staying at the fields, not spreading out along seven miles of shaded path toward Brookfield Zoo. But if your normal routine involves parking anywhere near Oak Brook Road to start a ride or walk, plan around September 9 through 13, and especially that Saturday evening, the way you'd plan around any week when 15,000 extra people show up in your neighborhood for a few hours.
The trail reopened after the Village's original mid-May target, and the Park District confirmed community use in August. Use the quiet stretch while it's still quiet.
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