Six of the seven Abbott World Marathon Majors will hand you a paper cup and wave you on come race day. On October 11, Chicago becomes the exception.
The Bank of America Chicago Marathon has confirmed it will offer on-course water refill stations for runners carrying their own bottles and flasks, a first for any race in the World Marathon Major circuit. Four filtered water units will sit immediately before aid stations 4, 7, 12 and 16 on the course, at miles 5.7, 10.1, 15.7 and 20.3. The announcement was made in partnership with Culligan International, which already supplies the finish line water, and HydraPak, which makes the soft flasks and collapsible cups the program is designed around.
Crucially, race organisers have confirmed that not a single existing paper cup station is being removed to make room for this. The refill points are additive, not a replacement.
- Race date: Sunday, October 11, 2026
- Refill stations: 4 filtered water points on course
- Locations: Miles 5.7, 10.1, 15.7 and 20.3
- Partners: Culligan International and HydraPak
- WMM first: No other World Marathon Major currently offers this
Where Chicago’s On-Course Water Refill Stations Are Located
The four units are placed at deliberate points across the course, spaced to cover each major section of the Chicago route rather than clustering in one stretch.
| Station | Mile Marker | Course Section |
|---|---|---|
| Before Aid Station 4 | 5.7 | North Side — Lincoln Park |
| Before Aid Station 7 | 10.1 | West Side transition |
| Before Aid Station 12 | 15.7 | West Side — Pilsen / UIC |
| Before Aid Station 16 | 20.3 | South Side push into Chinatown |
The mile 20.3 station is the one worth paying attention to. That’s where Chicago races either hold together or fall apart. A clean refill of your own mix right before the Chinatown crowd hits is better timed than it might look on paper. For the full neighbourhood breakdown and where each of these sections falls in the race, see our Chicago Marathon course guide.
What Hydration Gear Qualifies at Chicago’s Refill Points
The race describes eligible items as “approved self-carried hydration gear.” HydraPak’s official list covers soft flasks, handhelds, reservoirs and reusable race cups. Standard disposable cups do not qualify.
Check your flask before race day: If you’re planning to use the refill stations, confirm your specific bottle or flask appears on the approved gear list. HydraPak maintains that list and the race is built around their product categories. Showing up with something borderline on October 11 is not the moment to find out it doesn’t qualify.
For most runners, the regular aid stations — spaced every mile across the Chicago course — will be more than enough. The refill program is genuinely useful if you carry a specific electrolyte mix or prefer to control your nutrition intake rather than rely on what the race provides at each station. If you run on cups, nothing about your race plan needs to change.
What Chicago’s Decision Says About the Other World Marathon Majors
The fact that this is a WMM first in 2026 says as much about the other six races as it does about Chicago. Berlin, London, Tokyo, New York, Boston and Sydney have not moved here yet. Chicago doing it without touching a single existing cup station removes the main logistical objection other races might cite. If the October 11 execution is clean, expect the conversation to shift at other Majors fairly quickly.
The Culligan partnership is the structural piece to watch. Culligan already supplies Chicago’s finish line water. Extending that infrastructure into four mid-course filtered units is an operational step, not a reinvention. Other major city marathons with established water treatment partners could follow the same model without a heavy lift.
The 2027 Chicago ballot opens in late October 2026, days after this race finishes. If you’re already thinking about next year, our Chicago Marathon 2027 entry guide covers all four routes in, including the guaranteed time qualification path that most runners overlook.
Chicago has made a practical and well-timed call here. Four stations, sensibly placed, no cups removed, built on existing supplier relationships. It doesn’t change how most runners will run October 11 but it sets a precedent that the rest of the World Marathon Majors will find harder to ignore once it works. And it will work.