If free food is your love language, lace up: the fast food giant McDonald's has bottled its own pickle brine — yes, really — and it's handing out free Pickle Boost pickle juice in Chicago this marathon weekend. The limited-edition drink is timed to the 48th Bank of America Chicago Marathon, when cramps are every runner's nightmare. And it's one of the funkiest freebies of October 2026.

Image via Fox News
Whether you're running 26.2 miles or just cheering from the sidelines, here's everything to know about scoring a bottle.
What is Pickle Boost?
Pickle Boost is a tiny 2-ounce bottle of McDonald's pickle brine, made from the same brine supplied by the chain's longtime pickle partner, Mr. Chips, Inc. The giveaway was announced October 5–6 as a marathon-weekend exclusive — and Chicago is the only city getting it. No national rollout has been announced.
Where and when to grab it
The Friday preview is already history: on Oct 9, the Lakefront Trail stop at 2401 N. Lake Shore Dr. handed out bottles from 7am to 1pm CT. Sunday is the big day. On race day — Sunday, October 11, 2026 — five Chicago McDonald's restaurants will double as “Pickle Boost Pit Stops,” serving free bottles from 7am to 3pm CT. The deal: two bottles per person, free, while supplies last. And here's the best part — you don't have to be a runner. Runners and spectators are both welcome. The five pit stops, each on or near the marathon course: 2635 N Clark St; 1563 N Wells St; 600 N Clark St; 203 N LaSalle St; and 207 E 35th St.Why pickle juice works for cramps
Athletes have sworn by pickle juice for years — sideline staffs keep it on hand for muscle cramps. A 2010 study found that about a third of a cup of pickle brine relieved cramps faster than plain water. The twist? Some researchers credit the effect not to the electrolytes, but to a nerve reflex triggered by the vinegar that tells a cramping muscle to stand down.
One weekend, one city, and a whole lot of brine. If you're in Chicago on Sunday, swing by a pit stop and grab your free Pickle Boost — your calves may thank you by mile 20.