2025 Chicago River Dyeing: St. Patrick’s Day

In Chicago, dyeing the river green is a cherished tradition that signals the start of St. Patrick's Day festivities. Starting in 1962 and continuing every year after, members of the Journeymen Plumbers Local Union 130 gather to dump gallons of green dye into the Chicago River, transforming it into a vibrant shade of emerald. The spectacle is an iconic part of Chicago’s yearly celebration and has even sparked similar traditions in other cities.

This year, the river dyeing will take place on the Saturday before St. Patrick’s Day on March 15th, starting at 10:00 am. The dye used is plant-based, temporary, and completely safe for wildlife.

How Does the River Turn Green?

The Chicago Journeymen Plumbers Local Union 130 carries out the dyeing process a tradition that has been passed down through generations. Using 40 pounds of vegetable-based environmentally safe dye teams aboard several boats release and mix the color into the water ensuring that the river turns a bright and vivid emerald green. The dyeing process starts at 10:00 AM covering a major stretch of the river from Columbus Drive to Orleans Street.

How Long Does the Green Last?

The vibrant green color remains in the river for several hours and depending on weather conditions it can last up to a day or two before gradually fading.

Best Places to Watch the Chicago River Dyeing

Since the lower Riverwalk will be closed the best viewing locations include:

Upper Wacker Drive – Provides a clear and elevated vantage point.

Bridges over the river – The State Columbus Clark and Dearborn bridges offer great perspectives of the transformation.

Riverfront hotels restaurants and bars – Many establishments host exclusive viewing parties including:

• RPM Seafood
• Pizzeria Portofino
• The Royal Sonesta
• LondonHouse Rooftop
• Travelle at The Langham
• Raised Rooftop Bar

Tips for Spectators:

• Arrive Early: Large crowds gather quickly so it is best to find a good viewing spot at least an hour before the event begins.
• Dress for the Weather: March temperatures in Chicago can be unpredictable so layering is recommended.
• Bring a Camera: The striking green river is a once-a-year spectacle and a great photo opportunity.
• Continue the Celebration: After the dyeing, many people head to local Irish pubs and restaurants to enjoy live music traditional food, and festive drinks.

A Must-See Chicago Tradition:

The Chicago River dyeing is one of the most unique St. Patrick’s Day celebrations in the world. Whether you are attending for the first time or it is an annual tradition witnessing the river turn green is an unforgettable experience. As the city comes alive with energy and excitement this event remains a highlight of Chicago’s St. Patrick’s Day festivities.

NOTE: Bucket Listers is not affiliated with the Chicago River Dyeing. This event is free and open to the public

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